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Ask HN: Who is using MCP in production?
110 points by sukit a day ago | 131 comments

I’ve been following MCP since it first came out. It got a lot of attention early on, but I haven’t come across many people using it in production. I may simply have missed them.

If you’re using MCP in production, what are you using it for? What advantages have you found over a normal API or direct tool integration or just CLI?

rgbrgb a few seconds ago | parent | next [-]

[delayed]

jamesponddotco an hour ago | parent | prev | next [-]

I built an MCP server for my voice assistant. By default, Home Assistant offers a few tools to the models, but I felt like it was missing some, so I built it.

It has tools to get real jokes, do math, unit conversion, get stock information, search the web with Kagi, and other things I consider to be essential in a voice assistant. It even got approved by my wife.

At work I use our MCP server to debug and troubleshoot issues with our code too. Just yesterday I used it to figure out why a tag wasn’t showing up in traces; using the MCP server, the LLM was able to see that the tag was present in parent traces, but was lost along the way, and figured out why.

Could I find that without the MCP server? Yes, but I’d take me hours of going through lengthy traces, while the MCP and LLM found the issue in minutes.

erikus 26 minutes ago | parent [-]

I use MCP for a voice assistant as well.

I got a Pebble Index 01 ring and it has support for custom MCP servers. I run one on Tailscale and it can interact with Home Assistant, my home issue tracker, my Anki setup, etc.

I've come full circle on MCP. With agents with a shell tool they quickly became unnecessary but these days I've been coming up with more agentic use cases where I don't want to give the agent a shell, and a narrower MCP interface is a great fit.

Aldipower 7 hours ago | parent | prev | next [-]

We use MCP in production since March 26 for user-facing endurance sports analytics and planning that integrates directly with the MCP host, in this case the chat interfaces of ChatGPT, Claude, Grok, Perplexity.ai, Mistral, you name it. All of those let users add either custom MCP servers, which users can do with a simple explanation. To connect Claude for example: https://www.tredict.com/faq/connect-claude-web-with-tredict/ This way users can use Claude to create and push workouts with their Garmin devices based on a prior analysis. We also have a ChatGPT App, which uses MCP in the background: https://chatgpt.com/plugins/plugin_asdk_app_69aef5b699a08191...

The point here is, MCP is the backbone behind the product and enables regular users to do things without knowing anything about it.

The whole "is MCP useless?" discussion is totally pointless from a regular consumer-user perspective, they even do not know what MCP is sometimes. The Tredict ChatGPT App connects with one click and a simple oauth flow. That's it.

adityapatadia 6 hours ago | parent [-]

This. We also thought MCP was useless, but now the workflows by ChatGPT and Claude are so good; it's as good as installing an app from the App Store. We launched MCP for our SaaS and immediately found users using it.

API and MCP all are just buzzwords for customers. What they care about is whether they can get tasks done in our SaaS using Claude or ChatGPT. If that happens, it's a success.

deadbabe 3 hours ago | parent [-]

Do you not expose a standard REST api?

edgyquant 30 minutes ago | parent [-]

MCP is not just a rest api its a layer on top

patwolf an hour ago | parent | prev | next [-]

I don't use MCPs much for personal use, but I've come to see the benefits of having a standardized mechanism for distributing tools across non-dev teams, especially when they're using a hodgepodge of agents.

I'm also excited about the upcoming SEP-2640 extension to MCP, which will be allow skills to be delivered via MCP. While the skill format has been standardized, skill distribution hasn't. I know there are tools like Vercel skills CLI, but that's not a good option for non-devs.

5ersi 4 hours ago | parent | prev | next [-]

MCPs are diminishing in value a bit, because AI Agents are getting smarter about using API/CLIs. For example, I use gh cli via Claude instead of their MCP, because I already had cli setup, so no need to use MCP.

MCPs can potentially have great value if they cross multiple sources and combine results. For example at work we use an in-house MCP for log/metrics search across five different (legacy) systems. It finds correlation across events in different system within minutes.

kobalsky 14 minutes ago | parent | next [-]

MCP doesn't expose service credentials to the AI.

newman314 3 hours ago | parent | prev | next [-]

FWIW, it appears that using the gh cli is much more token efficient than MCP so that's a plus.

https://medium.com/@ravi.madabhushi/mcp-is-up-to-32-more-exp...

sammorrowdrums 3 hours ago | parent [-]

I see benchmarks a lot working on this, and I honestly think there’s too many things to cover in this comment but: - this article doesn’t enable tool search for starters where tokens start at near zero for MCP too - even with the above, talks of the raw token count don’t consider that for very long trajectories the prompt cache amortises much of this cost, and a feature of MCP is you can also customise the tools to a select subset, and that’s powerful - you can add tool confirmations for write/destructive actions trivially - the old training data on CLIs is good but actually for new features the fact MCP advertises them is also a bonus, but that takes longer to see, MCP isn’t that old

There are many more aspects, but even with GitHub MCP, where the agent has a huge amount of pre-training on the CLI, there are still reasons why people use it extensively - you don’t hear it a lot here but suffice to say usage never stopped growing to this day.

I think if CLIs are working for you then good, I also like our cli and did some work on it too, like adding gh skill subcommand.

Do use what works, and measure and improve - but this article is not doing justice to the MCP server IMHO.

throwup238 2 hours ago | parent [-]

> - this article doesn’t enable tool search for starters where tokens start at near zero for MCP too

Is that why I have to constantly remind Claude and ChatGPT that they do have access to a Github plugin that can access my account, instead of trying and failing to use the gh cli?

gycom 23 minutes ago | parent [-]

"claude, stop shelling out to grep, your search tool uses ripgrep and it's faster."

skerit 3 hours ago | parent | prev [-]

I use MCPs all the time, but just like in your case: they're my own MCP servers.

They do exactly what I want and how I want it. They expose just the information and the features I want the LLM to have. And just like in your case, it combines multiple sources of information into 1 response.

cgarvis 2 hours ago | parent | prev | next [-]

MCP is for when your end user (the one driving an LLM Agent) is non technical. Most non technical people are not going to install a CLI on their computer. Most are not going to be driving the LLM agent via a terminal.

It also very helpful when you need auth. MCP OAuth with CIMD makes it easy instead of cumbersome process of generating API Keys.

If you are technical and already using CLIs, then MCP doesn't give you much.

edgyquant 30 minutes ago | parent [-]

Even with a cli it doesn’t have a nice list of all commands and a nice description of when to call such a tool

konart 2 hours ago | parent | prev | next [-]

My company (I'm not part of the team that's responsible for anything AI related) has MCP's for Jira, Confluence, Mattermost fork and a few other integrations.

I have no idea about MCP vs API question but I always assumed that the whole point of MCP was an abstration between the model and the tool\service.

As in model does not have to know about a certain API (not to mention a particular version of it) to work with a service.

harijoe 31 minutes ago | parent | prev | next [-]

MCP Apps are the only way to build a connector that's actually usable from inside the Claude and ChatGPT apps. They return chunks of UI alongside the tool result, so a CLI simply can't provide the same functionality.

And you can't expect an average user to install a CLI on their machine just to search for flights or do shopping for example.

I work at Alpic, where we build Skybridge, a framework for developing MCP Apps. Our users have apps published on the ChatGPT and Claude stores, and they've seen traffic quietly growing over the last few months. Traffic isn't massive yet, but it costs little to stake out ground on a new channel and be ready if it takes off.

MitziMoto 10 hours ago | parent | prev | next [-]

We use MCP in production for our customer facing voice agents. Our custom MCP server defines tools and resources that the voice agents need access to to interact with our customers. (E.g. scheduling appointments, checking order status, etc).

Now we can point any voice agent platform we choose -- eleven labs, vapi, pipecat, whatever -- at our custom MCP server and it instantly has an understanding of the tools available, their inputs, and how to use them.

Compared to the alternatives everyone on HN champions, like clis and APIs, this is a no brainer. I'm honestly not even sure what the realistic alternative would even be.

Am I supposed to package and distribute a cli to ElevenLabs and ask them to use it? Give them a full API spec to implement for me?

I give them an endpoint and credentials and their platform instantly knows how to talk to mine. No one at ElevenLabs knows or cares about our implementation details.

HN has trouble seeing past the "developer in a terminal coding with Claude Code" use case for using AI. Real production agents have use cases that are very different!

When you don't own every piece of an integration with another system, there needs to be a well defined standard. That's what MCP provides.

denkmoon 10 hours ago | parent [-]

Excuse me for being dense but I'd love to know more, if you can share. So you offer a voice agent for checking appointments and orders and stuff, is that through your app or website or something? So you make a button in your app which says "talk to our AI", and you've got the button set up so that it can send the customer's input query, along with a bit of text saying "our MCP is here, use it to answer the query", to any one of the voice agent providers? then you get some audio data in return that you play to the user?

MitziMoto 10 hours ago | parent [-]

We use a Twilio integration to make it work over a real phone line, but it could just as well be an app or websocket connection in a browser.

Voice transport medium aside, the actual use case is not quite what you described.

Companies like Eleven Labs and Vapi provide a full end to end voice agent platform. They handle the STT -> LLM -> TTS pipeline and infrastructure for voice agents. Think of a customer talking to a virtual receptionist to schedule an appointment.

On the ElevenLabs platform, you provide them a system prompt (or an entire workflow/graph of system prompts) that instruct the voice agent on how to talk to the customer, tone, guardrails, how to answer specific questions, etc.

At some point we need that LLM agent, running on an infrastructure we don't control, to talk to our "CRM" (for simplicity sake). Enter MCP.

The MCP server we build and host supplies the "tools", like list_appointments, schedule_appointment, cancel_appointment-- whatever they may be.

When eleven Labs voice agent connects, it sees all the tools available and can use them per the instructions in the system prompt.

jdironman 9 hours ago | parent [-]

How is security handled in a situation like this? (I'll end up reading up on it). But I mean things like how does the API let a specific session with a specific user only surface information for that specific user from the available tooling?

edgyquant 24 minutes ago | parent | next [-]

You first authenticate via the phone (you can run an initial api call on phone start,) save session credentials in state on 11labs side and can then pass them back to future tool calls. You can then authenticate via a passcode if you wish

cco 8 hours ago | parent | prev [-]

Not the poster, but working on this right now.

The current framework that solves this the best right now is FiPA.

Establish identity the same way we always have, AS defines the challenges, the client (voice agent in this case) goes and gets them. OAuth from there!

cagz 7 hours ago | parent | prev | next [-]

Yes, quite a few uses in prod, main use case being abstracting API access for agents. In our case these are mostly in-house MCP servers, purpose built for the given agent.

Why MCP instead of CLI or agent accessing API directly?

Direct access (Curl/own small function): This requires agent to have full understanding of the API spec. Yes, context can be protected using progressive disclosure, but this essentially means agent needing to understand the API again and again, before every use in that context. Also, a typical API spec may or may not be agent-friendly. If there are nuances when calling an endpoint, where do we put these? Into OAS description? Works, but clunky.

CLI: It works beautifully, especially when a 3rd party CLI already exists for a complex backend. Assumes a well documented, agent friendly CLI, most CLIs are designed for human or CI/CD consumption. Talking about MCP taking up too much context, think about agent starting with my_cli --help, and going down through the switches and parameters one at a time to figure out how the CLI should be called. Less of a problem when calling a well know CLI (e.g. aws), but anything more niche (or custom) requires multiple turns to compose the final CLI command.

MCP: Has its issues, but offers an agent-native solution. Everything agent needs to know about a tool becomes available at once. In an enterprise environment MCPs can be served through an MCP Gateway, providing governance and permission management, this is quite contrast against running a CLI that requires agent to have execute permissions in its shell.

I must mention that we also utilise lazy-loading of MCPs. In use cases where 10s of tools needs to be loaded, only the most common ones are pre-loaded, then agent kernel connects the others as an when needed, and release them after a timeout (in case of long running sessions). This keeps the context lean.

trickleup 5 hours ago | parent | next [-]

We have taken to letting our agents use specific CLIs directly and we narrow down their access control with nono tool sandboxing via a customized Pi agent running headless. We have one agent that can use the aws CLI and nono feeds in a phantom SigV4 credential and then policy limits to just read-only http methods and certain L7 filtering on paths to limit its abilities - this means we can have it monitor and debug deployment failures without it doing any damage.

It was all largely based off this example https://github.com/nolabs-ai/nono/tree/main/tool-sandbox-exa...

0x696C6961 2 hours ago | parent [-]

How is this better than using MCP?

InfinityByTen 4 hours ago | parent | prev [-]

I'm really curious how you're dealing with lazy loading. Is the MCP then more like a tool-helper instead of the tools themselves?

I was trying to find out if the MCP has some sort of lazy loading feature/primitive in the works, but there seem to be a lot of disagreements about it.

Intuitively, lazy loading seems to be somewhere between a CLI and vanilla MCP. In the end, it sounds very similar to tiered/ progressive loading similar to images on low bandwidth connections.

0x696C6961 2 hours ago | parent [-]

The lazy loading is a harness concern.

navigate8310 6 hours ago | parent | prev | next [-]

I OCR'd my Chinese textbooks and made a stateless MCP that allows me to ground my Chinese language studies according to the textbook only. With this I can start a quiz, understand differences between words that have similar meanings knowing no extra grammar is fed when reviewing. I specifically use it with glm 5.3 as it is the most language specific LLM that understands nuances.

Here's the repository: https://github.com/iodize6399/xuexi-keben

And here's the server itself: https://keben.555420.xyz

AtomicSaboteur 4 hours ago | parent [-]

That's an awesome example! I'll definitely make use of your repo and idea for my German classes. Did you use a specific OCR method? I'm trying to get something better than tesseract :(

navigate8310 3 hours ago | parent [-]

I used Mistral 3. It costed me literally pennies. My workflow was kinda rudimentary but it worked really well. I suggest take a look at this https://github.com/docling-project/docling as well.

tasoeur 11 hours ago | parent | prev | next [-]

My context is realtime visual effect creation, but I’ve used MCP extensively in my (native) custom harness as a way to drive in—app UI updates and of course bidirectional state queries, including framebuffer capture for closed loop verification.

I feel like CLI would probably work too but then I’d end up implementing something similar. That being said, I’ve been bitten by the usual suspects: too many tools will cause context windows to grow quickly and some agents will sometimes skim through a subset of the tool list without querying the entire thing, causing incorrect behavior.

If you have tokens to burn I invite you to check out the source code see how extensively it’s being used: https://github.com/sxp-studio/subjective-zero

(video to see the MCP in action, it’s a bit long so feel free to skip: https://www.youtube.com/watch?v=DcI1tsPJ8eM)

Another kind of cool use of MCP that I’ve encountered is actually from… the French government! They do it for their open data initiative: https://github.com/datagouv/datagouv-mcp

RebeccaTheDev 10 hours ago | parent | prev | next [-]

For what I am using it for, I recently wrote a little web app called Afterfeed [0] that lets you view backups from social media websites as a single unified timeline.

To put this into perspective, I was a voracious social media user for decades. For me, this is 25 years of data, close to 100,000 posts, spanning everything from LiveJournal in 2001 to Mastodon in 2026. But when put together, it is a timeline of my life.

As kind of a last minute idea, I added an MCP server because why not? Once I wired an LLM up to it, I could ask introspective questions and find new ways of looking at myself and my own history. Simple things like "what was I doing 10 years ago around this time?" to more complex things like researching past thought patterns.

[0] https://github.com/rebeccathedev/afterfeed/

altmanaltman 8 hours ago | parent [-]

Interesting idea. I left social media over half a decade ago and just nuked my accounts. Something like this could have been useful. Like a personal archive

jitl an hour ago | parent | prev | next [-]

My employer Notion offers an MCP that’s mentioned in a few posts here.

Notion’s monorepo has 16+ MCP configs with many in opt-in plugins developers choose to activate.

Very useful; i particularly like sending an agent to debug an alert across slack/honeycomb/incident.io/materialize db

Eldodi 4 hours ago | parent | prev | next [-]

MCP usage is at an all-time peak - 17M daily (!) downloads of the official SDKs.

We're using MCP for virtually all our SaaS and infra providers (CRM, ATS, banking and accounting, Notion, Linear, all dev tools and hosting platforms) it's become a hard requirement in our buy bechmark. No MCP = NOGO

The advantages are:

- baked-in auth: no need to configure anything, it just works with our employees accounts

- one click install with Codex Plugins and Claude Connectors

simonw 7 hours ago | parent | prev | next [-]

I recently started using it as a way to make my own custom software available to regular ChatGPT and Claude, both of which support MCP if you dig around deep enough. Here's my TIL: https://til.simonwillison.net/llms/mcp-in-claude-and-chatgpt

tducret 6 hours ago | parent | next [-]

Same here. I was inspired by your post https://simonwillison.net/2026/Jul/31/stateless-mcp/

I reversed engineered my supermarket API and made a custom MCP to automate my grocery shopping. Now I can fill my cart through ChatGPT.

More details about it on https://ducret.dev/grocery-shopping-with-ai/

tajd 4 hours ago | parent | prev [-]

me three (at this point)

I've developed and deployed my own self hosted (on cloudflare / workerd) tool here https://github.com/TAJD/projektor and the key part was to be able to add it as a custom mcp server

mcnx097 an hour ago | parent | prev | next [-]

I use feedbackjar mcp. It's a feedback tool which also collects metadata like device, os, browser console etc. So my coding agent gets all the context of the feature request or bug report. https://feedbackjar.com

earthdeity 12 hours ago | parent | prev | next [-]

I hooked up claude code to Jira and Figma. This is more a condemnation of Jira than anything, but being able to interact with it in natural language in the terminal is a huge relief. Sadly, it's still limited in some ways. If it's available, it makes things a tiny bit easier than interfacing directly via api, so it's a nice to have.

jadar 11 hours ago | parent | next [-]

I did this as well. I found that it was really inefficient because if I was doing anything with a significant amount of text, it has to shuttle all of that through the model to the MCP invocation. It was way better to work with temporary files and pipe them around CLI tools once you’re happy with the contents. E.g. developing a user story and creating the Jira issue.

agentdev001 12 hours ago | parent | prev [-]

> "it makes things a tiny bit easier than interfacing directly via api"

By what metric? I would expect that a thin API client (with readable code) is generally going to out-perform a tool-surface which you don't have the ability to manage/edit.

Our_Benefactors 12 hours ago | parent | next [-]

If you don’t use the MCP Claude will default to taking screenshots of figma designs.

altmanaltman 8 hours ago | parent | prev [-]

This is what I don't get often when people say "ai will be the ui". Like pressing a button to get an action done for me will always be quicker than asking an LLM to do an action and then waiting for it to understand and do that action. Why will I not prefer to just press the button?

I run a lot of services to track my life and work and theoritically I could hook up their apis or mcp if supported to a harness and pretend like "oh its a talking computer that can do whatever i ask" but in reality, I can go through the native ui of those services esp with things like hot-keys for a faster and more ergonomic experience than talking to a jarvis and having to recorrect it if its wrong

fl0id 6 hours ago | parent | next [-]

not OP, but then I'm washing the dishes and don't need to do anything else.

lazyasciiart 6 hours ago | parent | prev [-]

When you are holding a pet, or washing the dishes?

throwup238 2 hours ago | parent | prev | next [-]

I use MCP for two types of things: ones where I need to give access to the memory of the process like an MCP server to inspect a Qt gui, and ones where I need to give authenticated access to my data to ChatGPT/Claude web/mobile apps. For these uses CLIs would be too cumbersome in use or auth.

For the latter, Cloudflare Tunnels + Zero Trust + Github SSO means securing them is rather easy and with the recent cf cli the agent does all the work. Their native support for base64 encoded images is also helpful to “encourage” the LLM to look at stuff without constant prodding.

SegmentTree 7 hours ago | parent | prev | next [-]

We use MCP when security and tight capability boundaries are important.

For example, even GitHub’s fine-grained tokens aren’t always fine-grained enough for our use cases. In those situations, it’s straightforward to build a small MCP server that exposes exactly the operations we want an agent to have access to.

That gives us a much smaller and more explicit attack surface, without having to manually audit every possible GitHub CLI invocation the agent might make.

kqr 6 hours ago | parent [-]

I get this use-case, but what makes an MCP server better than a custom CLI tool that exposes those same operations? That's how I've solved similar things in the past.

edgyquant 17 minutes ago | parent [-]

Mcp just wraps the existing calls with a description of when to use them. Why would you write a cli for something like this? And clis generally have a help call but that doesn’t say when to use a tool just what it does

boredumb an hour ago | parent | prev | next [-]

We offer MCP and then consume it with our in-app assistant to go from a non technical prompt to a series of what is essentially API calls they can automate for themselves for repetitive tasks or things that require a few screens to accomplish can be done from the assistant widget itself, etc.

josete89 3 hours ago | parent | prev | next [-]

At Adidas we use MCP in production, both flavors stdio and remote. Remote is more for secure autonomous agents or agents workflows and stdio is more intended for local development. So far we are good with this still don't see the point of A2A except some really specific cases, if you have the tools and a smart model do you need really split with different agents?

div3rs3 3 hours ago | parent | prev | next [-]

I assume the target audience for the question is developers. That will generate many responses along the lines of ”just use a CLI”.

The current, main driver I see for MCP servers are non-technical people who want to securely connect data sources to their AI application.

olmo23 6 hours ago | parent | prev | next [-]

For us it's pretty much a standard request from our clients now: that they are able to use their chatbot to interact with the ERP systems.

peaxkl 3 hours ago | parent | prev | next [-]

We (HappySupport [1], help center with lots of automation) recently added an MCP server - this was highly requested. Our users are using it to reorganize their help center, answer questions (internally) and to create/edit/move/publish/unpublish or delete articles.

It was also pretty handy for importing existing documentation from obscure providers without having to build an integration for each of them.

We also added WebMCP [2] for agents to consume our public documentation/help center, but we haven't seen it used yet.

An API would work for all of these cases too, but since customers are using it in their AI tools anyway, MCP is just simpler for them.

[1] https://www.happysupport.ai/en [2] https://developer.chrome.com/docs/ai/webmcp

morelandjs 2 hours ago | parent | prev | next [-]

In many cases, you can partition data at rest (eg parquet) on the user access key, then load it once into an agent container at runtime. In this way, one authentication pass provides access to all data in a sandbox, versus repeatedly authenticating against MCP calls. It also just reduces the connective tissue between the harness and the data. There are obviously drawbacks in that you aren’t leveraging real time APIs, but it works well for most business use cases.

dorianniemiec 44 minutes ago | parent | prev | next [-]

I do, was using Grafana MCP to a local Grafana instance for QA-testing my web server.

bretpiatt 3 hours ago | parent | prev | next [-]

Running a bunch alongside APIs for suite of internal services where domain experts are using agents to setup environments for their work. Getting them to update their LLMs to a new SDK version every time we iterate API capabilities is all the headache you'd imagine. The MCP avoids inconsistent user reports of capabilities.

The specifics, now user can ask, "Provision 200Gi PostgreSQL 18 with PostGIS 3.6 and then copy over our most recent Texas set of layers."

Behind the scene Talos, k8s, NiFi, and bunch of things go to work. Big productivity boost vs. the users needing to login to bunch of provisioning web interfaces which is the other method we publish that avoids version drift issues.

mlitwiniuk 3 hours ago | parent | prev | next [-]

I use it for fully auditable agentic compliance work - many of my customers already used MCPs for their compliance work, and recent changes made that fully auditable. I have to admit that it's much easier to use and work on compliance this way than using the agent built into the app.

https://auditbadger.com/auditable-agentic-compliance/

boltguo 13 hours ago | parent | prev | next [-]

I built a small MCP service tool to my own learning; it retrieves study materials and course content, enabling me to learn through voice-based interactive conversations with ChatGPT. logs my learning data, which I can then retrieve and analyze to assess my overall progress.

jimmy-c 4 hours ago | parent | prev | next [-]

We (Prostack, UK managed hosting) launched an MCP server for our control panel- https://mcp.prostack.uk - to allow users to interact with Claude/Cursor etc, for debugging & deployment.

"Why is my site showing an error", "Deploy this project" etc are the key flows, and users have been building on top of them. It's a nice link between dev & prod, and a great debugging assistant. It's been very well received so far.

Implementation was pretty straightforward (tools mapped to our API) with appropriate guardrails for destructive actions.

mstade 6 hours ago | parent | prev | next [-]

We (Synqly) have a production MCP server which several of our customers use in their production services. The functionality ranges from mundane management capabilities such as walking through how to add an integration in natural language (e.g. support bot) to more than exciting use cases such as making complex queries across a number of tools to create aggregate reports.

It's a very popular part of our platform.

itzprintz 5 hours ago | parent | prev | next [-]

Reporting is what we use MCP for.

We do social media community management ( https://trollwall.ai/mcp ) and our customers want to know what their followers are talking about - topics, sentiment, why are people angry, showing actual example comments, comparing to last month.. Having a conversation about this is much better UX than having dashboard or static report (.. your Claude can at the end even generate PDF report on what you talked about).

We tried to build different analytics screens for this and we always found out that different types of customers what their own angle. MCP, together with knowledge/memory of their own ChatGPT/Claude, allows them to super customize it for what they want and need.

kizum 4 hours ago | parent | prev | next [-]

I (SiteSpeakAI) use MCP in production in 2 ways, to analyze usage and make improvements to the app itself to hopefully improve the customer experience, and then also as a feature for each customer so they can interact with their own cx install and monitor / improve prompts etc. Been really useful, but important to note most customers are at least a bit tech savvy, so MCP makes sense for them.

Don't think it would be that useful for non-tech users.

bhagyeshsp 7 hours ago | parent | prev | next [-]

I'm using in production for one of my physical products. The product is a set of 50 printed cards for facilitation. The MCP server can be used by the facilitator to plan their workshop. The reason behind providing MCP is simple: my end-users do not need traditional API, they need something that they can install in their Claude Desktop app and work with the proprietary data of the product. My product's data lives at edge in Cloudflare Workers. (Of course, a determined user can scrap the data if they want, but that's fine.)

Other uses of other people's production MCP I'm using is Dodo Payments' MCP server. It has helped me a ton for looking up their documentation etc. 10xed my OpenCode agent's speed in building payment integration. This was the first serious usage and benefit I experienced of MCP servers.

Reference: My production MCP server: https://www.npmjs.com/package/@sisyphus-consulting/wuwei-mcp

falbala 5 hours ago | parent | prev | next [-]

As a user, I use a couple of them with Claude: dash0 + linear + readonly access to a prod db, I can now understand and debug our user's issues in minutes with all the forensic automated.

In our product, we found it hard to onboard people on our platform because even though the data was rich, our features were subpar and in development. I've opened the MCP API based on our GraphQL API (like 100 lines of code and config, piece of cake), and we got heavy usage day 1. The adoption went from convincing them to use the platform, to them flooding us with new feautres and data requests.

thinkindie 4 hours ago | parent | prev | next [-]

I've ramped up my MCP game this year, I started with Linear and Notion and I recently launched an internal MCP for internal data that is being used by my colleagues too for reporting and preparing for meetings with customers (we do upsells for hotels www.upsellguru.com ). It seems like that some of the most tech savvy customers are looking forward to use it too and we may open to them too.

ma2kx 11 hours ago | parent | prev | next [-]

In general the advantage of MCP would be the possibility for a fine grained control over the tools the agent is allowed to use. But unfortunately there is a myriad of nightmarish awful mcp servers around which are worse than direct API access or even a cli integration.

I wont advertise any commercial mcp I use but to give an example for a well designed and useful mcp server I could name the nixos mcp. Its useful because it bundles all the nix resources to one endpoint which is more efficient than web search and gives you better control over the sources.

https://github.com/utensils/mcp-nixos

Another one would be this filesystem mcp which is in my opinion to prefer over direct cli access. Of course this depends also on your general sandbox strategy but if you just use a generic docker image there are still many potentially dangerous binaries available and such an mcp can restrict the models capabilities.

https://github.com/modelcontextprotocol/servers/tree/main/sr...

And of course there are many service provider offering their mcp with its own llm / agent behind e.g. most web search provider. In this case you most likely already use an mcp without noticing it.

mootothemax 12 hours ago | parent | prev | next [-]

I recently created a planning applications scraper for every council/local planning authority in the UK, very much with Claude's help. As you can no doubt imagine, it's the type of task where the mechanics are far less important than everything surrounding them.

Getting things like this to work well, for me, often boils down to finding out the things I don't know that I don't know in as little time as possible. I worked with Claude to create a basic debugging front-end as part of that - for my own use, inspecting the data, looking for patterns - when, largely on a whim, I asked Claude to create an MCP interface on top: last run status, what's looking good, whats not, where are the coverage gaps in the individual data points.

And I added the MVP to Claude and would check in regularly to ask how things were going.

And then - I'd ask for some nuance about why something doesn't look quite right. Or what happened to councils in general last night? And - out of nowhere, not being prompted or asked - Claude would query the MCP alongside looking at the code. Immediate production-grade insight while I'm debugging from the comfort of my chair.

And I thought "Oh."

And "this is really quite good," because the key detail is, I think, if an MCP is good and works well, and relevant to what you're doing every day at that point in time, it's yet another addition to your toolbox.

And that got me thinking about how I can do the same for my 9-5 users.

pixxxel 4 hours ago | parent | prev | next [-]

In my previous company we used MCP for voice agents. It was easy to use open-source mcps, since we did all the oauth and account management on our side. This also makes it easy for customers to bring their internal tools in a standardized format.

brettdav 10 hours ago | parent | prev | next [-]

I’ve deployed mcp to prod on numerous internal apps where ai-integration has been first party requirement. Obviously, agents can use an existing api, however maximum capability requires it to be well designed and documented. As many of you may have experienced, that is not something that can be assumed and improvements may be “impossible” or at least out of current scope.

That’s where mcp (and recently webmcp) have their benefits. By design, the protocols provide predictable structure that allows agents to discover and use the tools you provide.

I’ve had success using mcp variously as an agent friendly wrapper to an existing api and as a greenfield product designed for agentic workflows. Agentic workflows can string together multiple api endpoints together into a single tool call and or use their own dedicated backends.

To share my learnings, I’ve released a free tool at https://anc.dev . While It’s still very much a work in progress, I’d love dialog and constructive feedback.

hnlmorg 7 hours ago | parent | prev | next [-]

Advantages vs skills: connecting to enterprise systems via OAuth.

Yeah you could call CLI tools that support OAuth, but then you have two sets tools (CLI plus a skills file) to manage manually instead of a hosted MCP server.

baalimago 6 hours ago | parent | prev | next [-]

When writing agentic apps (apps which embed an agent for semantic work), exposing the same tools which are injected into the agents as an MCP allows for practically the same functionality to be debugged and run in a normal agentic harness.

Good for both development and cost reduction, as the agentic harnesses often allow for much greater amount of token usage per subscription, as opposed to API key which always is per volume.

moezd 5 hours ago | parent | prev | next [-]

Chatbot+MCP, agentic workflow+harness seems to be the divide in my workplace: Business people want a chat UI, they get MCP. Developers want to automate things, they plug in their dotfiles and other scripts. Not sure if it reflects the larger population.

cientifico 4 hours ago | parent | prev | next [-]

Custom connector to paperless for processing fetching, reason... Off any physical contract or letter received by the company. Google drive for everything digital. Paperless for more legal things.

VanTodi 7 hours ago | parent | prev | next [-]

I don't know if it counts as production, but I use it for my task tracking, as well as a web GUI. When talking to Claude and working on a plan for a feature, I tell it to cut the tasks into small tickets and write it to my selfmade Ticketboard.

My phone's AI assistant can talk to it too, so if I remember a task mid walk out in the sun, I can just talk to it and it can write it down.

igor_nast a day ago | parent | prev | next [-]

We have it, a fresh tool that landed recently in prod. Makes it easier to communicate with the app resources. And it's a standardised way for agents to talk to a remote resource, easier for them to understand what is available and how to use it.

Read more about mcp tools/resources/prompts.

latchkey 12 hours ago | parent [-]

I don't understand the need to make things easier for a robot. Point them at an API and they can figure it out. Can you explain in more detail what is easier?

DANmode 12 hours ago | parent [-]

MCP apparently reduces probabilistic failures - aka the common fatal flaw of all of these robots (hallucinations, missing stuff in the API doc, etc).

This makes it a little more interesting to me, knowing those results.

It definitely underlines what we already know about the specific weaknesses of LLMs replies/results.

mapcars 8 hours ago | parent | next [-]

>MCP apparently reduces probabilistic failures

Does it really do that much difference? I mean in the end robots process MCP output the same way they would process API docs.

latchkey 12 hours ago | parent | prev [-]

I think that was a problem 6 months ago, but GPT 5.6 Sol on xhigh doesn't have those sorts of issues. I don't think it'll last. Things are moving fast.

bigstrat2003 12 hours ago | parent | next [-]

People say that with every single model release, and every single time they're wrong. I bet you anything that it's no different this time than the last dozen times.

latchkey 11 hours ago | parent [-]

i'm burning 500m tokens a day "writing code" for 83 days straight. one of those projects i'm building integrates netbox, stripe, quickbooks, mercury and deel all together via api. i wrote zero lines of code and read zero api docs. it does exactly what i want and gives me a 360 degree view of every aspect of my multi million dollar arr biz.

how about you?

hypfer 8 hours ago | parent [-]

360°? That's weak.

The real experts have a 720° FoV with multiverse time travel.

DANmode 12 hours ago | parent | prev [-]

I’d be willing to believe that!

Corporate still runs lots of bullshit for compliance, though.

latchkey 12 hours ago | parent [-]

what happens when openai offers compliance as a service?

ballsac 11 hours ago | parent [-]

Why don’t you tell us instead of asking questions

DANmode 11 hours ago | parent [-]

I’m getting most of it, but fair critique lol

It’s not clear, but if you have a handle on how it might go, I’m interested in that take (saying this to anyone).

hhh 8 hours ago | parent | prev | next [-]

We use it for access to gitlab, ado, github, datadog, rancher. I think the rancher one is the worst. We develop custom MCP servers for our internal stuff for agents to use, and it all gets accessed thru agentgateway.

I don’t really like having to use MCP but we don’t have a good solution for authorizing individual calls outbound from a sandbox without choosing to just not care about the sandbox.

jalev 4 hours ago | parent | prev | next [-]

Our company has an MCP which hooks into a bunch of metrics/analytics that we've been using to do RCA on a whole slew of issues.

mhammerc 6 hours ago | parent | prev | next [-]

We use MCP in our monitoring systems.

A claude routine runs without access to internet except for Slack (API) and Sentry (MCP).

It reads the Sentry MCP, compare the errors to the app source code and post a daily digest to Slack.

The reports are very accurate.

muzani a day ago | parent | prev | next [-]

I used one for an AI tool that allows people to report bugs/feature request directly.

It searches to make sure it isn't a duplicate, writes up the ticket, then submits it.

Because it's a production tool, we want the cheapest possible one without it being too inaccurate. If you used a API etc, you'd end up building what's effectively a MCP-like adapter on top of it anyway so it could communicate in natural language instead of dealing with JSON and such.

Linear's MCP is also very clean and well designed, probably one of their core advantages over, say, Jira. I wouldn't know what the API looks like because the MCP works great.

blackqueeriroh 8 hours ago | parent | next [-]

Atlassian’s MCP is phenomenal and they e had theirs longer than Linear

InfiniteLoup 18 hours ago | parent | prev [-]

>Linear's MCP is also very clean and well designed, probably one of their core advantages over, say, Jira.

I was under the impression that Linear's MCP server code isn't public. How do you know that it's well-designed beyond following spec[1][2]?

[1] https://linear.app/docs/mcp [2] https://modelcontextprotocol.io/specification/2026-07-28

jcheng 11 hours ago | parent | next [-]

They probably mean the tool APIs that the MCP server exposes are well designed. Definitely makes a big difference.

tbrntbqm 18 hours ago | parent | prev [-]

That's what we used in our product - a bug report tool that uses Linear MCP to create a task. Works great.

cjonas 8 hours ago | parent | prev | next [-]

We use mcp as a "gateway" for a customer facing cloud agent. It basically is just a tool registry and could have been built using open-api... but MCP is arguably more robust/aligned for context management and the agent frameworks and observability tools support it first class.

krenerd 2 hours ago | parent | prev | next [-]

even if you try to provide an MCP of your existing product so any AI client can interact with it, I would argue APIs are a better implementation.

les 3 hours ago | parent | prev | next [-]

well it is in production but very low usage mapkin.eu and jotkin.eu mainly tools i use myself to send stuff to clients basically persist chat via mcp.

rcarmo 7 hours ago | parent | prev | next [-]

I work with corporate customers, and it has become (literally) the new API management layer, to isolate and audit connections between systems and prevent people from developing random API clients.

skiing_crawling 8 hours ago | parent | prev | next [-]

Having a hard time understanding what MCP is really for. Even for my small local models, if MCP is not available, they seem to do just fine connecting to anything I need with an API and falling back to using a browser.

Surac 8 hours ago | parent | prev | next [-]

My Company developed a MCP ti control our product we ship to Customers. So we use it inhouse for testing. It was so convenient that multiple Software developer adopted the mcp tosetup there test environents

caudena 12 hours ago | parent | prev | next [-]

Caudena released some of its enterprise capabilities within MCP last year, and made them available to the consumer market this year at https://mcp.caudexcatena.com/.

We have received very good feedback from clients across the enterprise and consumer segments, they really like it.

xcf_seetan 8 hours ago | parent | prev | next [-]

I am being working on a new ui framework and will deliver a mcp, a lsp and a skill to help create new apps, because as it is new, it is not in any data used for training any llm.

insin 10 hours ago | parent | prev | next [-]

I work on an F100's internal, vendor/model-independent LLM chat app whose agent runs in your browser, so CLI isn't an option, direct API is out as the agent deliberately doesn't have any tools for hitting arbitrary URLs and it can't access the network via its iframe-sandboxed code execution tool, so we use MCP in the harness to let it do third-party things, with e.g. Atlassian and GitHub MCP servers pre-configured and support for BYO MCP if there are compatible third-party servers you want to use, or are running your own locally to provide tools to let it do things on your machine (it can already be given R/W access to your local filesystem via showDirectoryPicker()).

The biggest issues are usually that a third-party MCP server you're trying to use either has misconfigured CORS so the browser can't hit it, has a bespoke OAuth setup which doesn't work with @modelcontextprotocol/client, or they don't support Dynamic Client Registration (DCR) so you can't just point at it and use it. It's nice when none of these apply and it Just Works, the user can auth easily with the third-party and refresh tokens automatically handled in the background by the client.

That's the advantage, really - you didn't have to define the tools yourself, auth is handled for you, and the agent doesn't need to (and can't) access credentials or tokens as it knows nothing about MCP.

Bossie 5 hours ago | parent | prev | next [-]

Linear MCP, custom made Node-RED MCP and a custom made ERP vendor MCP.

All prove great value.

Motheki 12 hours ago | parent | prev | next [-]

I use fff [1] For the performance improvements when reading files. I prefer in most scenarios to use skills.

(1) https://github.com/dmtrKovalenko/fff

willsmith72 8 hours ago | parent | prev | next [-]

Internally we have MCPs for many many tools, I would expect if anyone builds a product or new feature today it has an MCP or skill

btables 11 hours ago | parent | prev | next [-]

Building an agent runtime at cadenya.com and MCP servers have been the hardest part to create adapters for. For a two year old spec, there's far too many permutations.

mrubon 16 hours ago | parent | prev | next [-]

I find clis or calling apis directly to be waaay cheaper and faster. The only mcp i use at this point is the jira mcp only because i set it up a while ago and it's been there for a long time now

sonofaragorn 12 hours ago | parent | next [-]

We used to use the jira mcp, then a jira skill, and now simply use the jira acli. Much cheaper and works fine

altbdoor 13 hours ago | parent | prev [-]

Jira/Atlassian APIs are so convoluted anyways, I'd rather use the MCP

reilly3000 12 hours ago | parent | prev | next [-]

MCP is still the main way I use Cursor with enterprise systems like Glean, Jira, and Port. Other than that, everything, especially you GitHub, is moved to CLIs (+skills as needed)

m00dy 2 hours ago | parent | prev | next [-]

We use MCP in production.

We built an MCP integration for agentic access to our platform, Proxybase [0]. It lets agents buy and sell bandwidth through SOCKS5 proxies directly from the platform.

The main benefit is simpler integration with agentic harnesses. MCP still accounts for only around 20% of the agents using Proxybase, but it has made the integration process much easier for those users.

[0]: https://proxybase.xyz

ntlm1686 13 hours ago | parent | prev | next [-]

many things once needed a MCP server now could be easily done via using CLI by agent

branislav 8 hours ago | parent | next [-]

I’m curious, how do you handle authorization of the user without leaking tokens/api keys to model context without an MCP server (which supports OAuth, in principle)?

royal__ 12 hours ago | parent | prev [-]

This is the answer.

sonofaragorn 12 hours ago | parent [-]

yes! I think it's yet another fad that is slowyly dying. I wish my company hadn't spent a whole team working for like 6 months creating an MCP server that no one will ever really use at scale

steammaho 5 hours ago | parent | prev | next [-]

We use for jira, confluence, excel. Attlassian projects require Rovio and this is additional payments. So we wrote our mcp to connect and work with them

cbeach 4 hours ago | parent | prev | next [-]

I use MCP for Stackography, a tool I built that visualises my estate (hosts, apps, databases, tunnels, proxies etc), showing a force-directed graph, which includes live health, and a flexible search tool. It's very good for answering questions like "what stuff am I running under Docker", or "show me everything that makes up app X". Also shows the history of changes, summarised by LLM.

MCP is useful because it has instructions to Claude (or the agent of your choice) that tell it how and when to manage the graph. Integrating with Stackography is a one-line operation:

    claude mcp add --transport http stackography https://app.stackography.com/mcp --header "Authorization: Bearer stk_...

Now when Claude builds me something new, it knows to update Stackography.

invite link: https://stackography.com/invite/8J22NXZSFT

flanked-evergl 4 hours ago | parent | prev | next [-]

I use almost no MCPs and feel like I'm not missing out on anything, I just use APIs directly or CLIs. I honestly don't quite see the point of MCPs any longer.

KaiserPro 5 hours ago | parent | prev | next [-]

Yup, but with some caveat. For things like backstage, which have MCP servers but are really fucking insecure, we have a wrapper API that is then linked to a skill.

NietTim 6 hours ago | parent | prev | next [-]

Over the past 3 months we've been using it a LOT. I made one for our admins so they can work with the CMS and get statistics in their client, the statistics part has been a huge unlock. The big advantage here is that a normal API, direct tool integration or CLI are unpractical to set up for my less technical coworkers.

Other then that I've been building MCP's in pretty much all (personal) tools I'm making now, it's very useful to have a central way for an agent to look at production data without having to ssh into a server.

spiderfarmer 6 hours ago | parent | prev | next [-]

For some of my projects I use it instead of a CMS. I still have that CMS, but I rarely use it anymore.

Could I have used an API? Maybe. But Laravel MCP makes it very easy to run a MCP server.

JohnHaugeland 12 hours ago | parent | prev | next [-]

i’m a day or two from releasing my programming language’s new mcp

agentdev001 11 hours ago | parent | prev | next [-]

I am not using MCP in be production- but, my team is. My team also produces MCP servers for other teams, and I find it a bit maddening. I wonder if anyone can relate to my experience here.

It feels like there is a significant amount of baggage with MCP. It had first mover advantage- coming in at a time when the frontier looked much different. Models were significantly less predictable, would consistently screw up tool calls- and couldn't quickly find a good path to interfacing directly with an API.

Things are much different now- and I'm frustrated to see that new projects on my team still consider MCP as a reasonable first pass solution for getting data in front of a model. Everyone uses Claude Code (cli, desktop; I also am frustrated that so many people use CC over alternatives- that's another rant) and thus, everyone has an harness that'll happily leverage shell + skills to get things done precisely. So- why? Why is it that I see my team-mates all using the same Atlassian MCP server that's flawed- which we don't control the tool surface of? Why not point an agent at the API spec? If the answer is that it's too slow to startup, having to read the API spec to figure out what to do- then, point it at your .claude/.codex/.whatever directory- find where the agent has used tools from the MCP server, and create skills or some thin client surface.

And I will grant that yes, I have observed that a well-engineered MCP server can offer better performance than giving an agent a loosely defined task to perform with an API. However- 'well-engineered' is not easy to achieve. You must run many iterations of benchmarks and evaluations, observe trajectories, and improve the tool surface over many iterations. You also cannot predict users- so you need to monitor the usage, and improve over time. It's a heavy lift.

Additionally- no-one is benchmarking this stuff. They throw MCP at the problem, and call it a day once an agent can achieve the task. Frustrating.

I tried for a while to speak up and suggest that maybe MCP might not be worth the effort compared to improving the UX (or, AX) of API surfaces, or instead putting cycles towards better data storage and presentation. But I find that I'm starting to feel like a dick for bringing vocalizing this consistently when MCP is mentioned.

I realize this is deep into rant territory by this point. However, anonymous posting on the internet can be good for the soul. Anyway- it generally feels as though others are not as interested as I am in eating their pride, generating research, and improving what we know, and how we do things. This goes back to CC- I am the only member of my team that is not using CC as their daily driver. Again- I feel like a dick, but my god, I sound like a broken record suggesting that others try different models and harnesses. I hear constant half-complaints about verbosity of output, or churn- and barely anyone has been willing to give OpenAI models a spin.

I can't bear to hear a group pity-party about how model output is exhausting to read- when the complaints are exclusive to Anthropic models, and no-one has even read the prompting guidance which states clearly how to drop the verbosity/density/flowery-ness of output.

And for the love of god. Stop trying to make models from other providers work in CC. It is not impossible; but it is by nature, a hacking-unfriendly platform. I promise you that CC cli is not the only coding-agent cli tool that you will feel comfortable using. Actually- I'm willing to double down and bet that you will loathe CC cli once you see what the grass looks like out of that orange walled garden. Bah!

-

Edit: AND! What's the obsession with these (https://artificialanalysis.ai/articles/search-api) products? What's wrong with: https://platform.claude.com/docs/en/agents-and-tools/tool-us... and https://developers.openai.com/api/docs/guides/tools-web-sear... (or, OpenAI's alpha/search endpoint)

porridgeraisin 6 hours ago | parent [-]

Many of the other search APIs are better than in the inbuilt claude or codex ones. You can try this out yourself by e.g enabling exa in codex plugins.

vips7L 8 hours ago | parent | prev [-]

Dead tech