fastmcp

Cloudflare shipped 1000 tools in 1000 tokens by adding server-side code mode to their API. FastMCP 3.1 lets you add it to yours. With one line of code.

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𝐃𝐚𝐲 𝟑: Don’t give an agent a direct line to your systems without a doorman. 🚪 @eddie_shark explains how Horizon Gateway and Remix keep your agents from going off the rails. 🎙️

𝗗𝗮𝘆 𝟯: Horizon Deploy gets servers live in 60 seconds. Horizon Registry keeps you from rebuilding the same one 6 times. ⚡ @radhigulati breaks down Horizon Deploy and Registry. 🎙️

🌅 How does 𝗣𝗿𝗲𝗳𝗲𝗰𝘁 𝗛𝗼𝗿𝗶𝘇𝗼𝗻 handle the stateful connections and auth flows that standard infrastructure ignores? @AAAzzam explains the platform capabilities 📽️

DAY 2: Yesterday we released the beta for 𝙵𝚊𝚜𝚝𝙼𝙲𝙿 𝟹.𝟶. Today we welcome Prefect Horizon 🌅 Horizon takes MCP servers from local to production with auth, observability, and tool curation built-in: ◾ 𝐃𝐢𝐬𝐜𝐨𝐯𝐞𝐫𝐲 — central catalog for teams ◾ 𝐆𝐨𝐯𝐞𝐫𝐧𝐚𝐧𝐜𝐞 — policy-based access ◾ 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 — managed stateful gateways ◾ 𝐂𝐮𝐫𝐚𝐭𝐢𝐨𝐧 — keeps your agents sharp Try it at prefect.io/horizon More about Horizon🧵

FastMCP 3.0 is here! This is our largest and most ambitious release ever. We've re-architected the framework to support the next generation of MCP applications. It's time to move fast and make things. 🧵

There are exactly 2 MCP sampling power users: Bill Easton (@strawgate) and Angie Jones (@techgirl1908). They were building agentic loops before SEP-1577 even existed. Now the spec caught up to their vision and it completely inverts how we deploy AI agents. Adam explains the "yo dawg i heard you like tools" implications. Full episode from the @fastmcp pod on Spotify. Throw it on for your commute, link below.

Prefect is proud to be a founding member of the newly established Agentic AI Foundation. The AAIF, a directed fund under the @linuxfoundation , was established by Anthropic, Block, OpenAI, Google, Microsoft, AWS, Cloudflare, and Bloomberg. Today, Anthropic announced they're donating the Model Context Protocol (MCP) to the foundation. Open source is core to how we build. @fastmcp has been part of MCP's growth from the beginning, now downloaded over a million times a week. We're joining the AAIF because the future of agentic AI should be open, trusted, and built by the community that uses it.

@MCP_Community Wrote a bit more detail about Claude Skills, and how to make them portable with Remix MCP Servers. prefect.io/blog/moving-cl…

Four AI giants walked into a @githubuniverse panel: @AnthropicAI, @Microsoft, @OpenAI, and @fastmcp 😉 The first three companies are locked in an all-out race to lead AI. But get them talking about Model Context Protocol? The competition falls away. They're finishing each other's sentences and building on what the community is creating. We compiled a few highlights from the panel below. Take a look!

If you're in town for @aiDotEngineer, join us, @pydantic, @tryramp and @clay for our inagural PyAI NYC event. luma.com/9fpk2sil

cooking with our friends at @supabase more on that soon

FastMCP maintainers getting ready for the November 25th, 2025 MCP spec. Working to get the ergonomics right for tasks in SEP-1686 has been a ton of fun. Tutorial dropping later this week!

NYC. Py AI Meetup. @pydantic, @clay, @tryramp and @fastmcp Join us November 21! luma.com/9fpk2sil

New York Python & AI Folks! Join us on Friday November 21st at 6PM for our inagural PyAI NYC event hosted by our friends at @clay ! A series for practioners by practioners, featuring: - @samuelcolvin at @pydantic - @jlowin at @fastmcp & @PrefectIO - Rohil Hatalkar at @clay - more! Come for the talks, stay for the networking, and celebrate @fastmcp's first birthday. luma.com/9fpk2sil

Some MCP servers are vulnerable to "confused deputy" attacks. These attacks take advantage of leftover OAuth cookies to register malicious clients without notifying the user. FastMCP 2.13.0 keeps your deputies safe with a new customizable consent screen:

I'm teaming up with @samuelcolvin to launch a new meetup series, Py AI. Our first one is November 11 in San Francisco with talks from @pydantic, @modal, @reductoai and @fastmcp. Hosted by our friends at @pebble_bed. Link to join below!