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Jeremiah Lowin
Jeremiah Lowin
@jlowin.dev
CEO @prefect.io. Building FastMCP. Mostly harmless.
7.2K followers373 following655 posts
Jeremiah Lowin reposted
Just delivered "Build your first MCP server in Python" tutorial at #PyConUS! Packed house, great Qs. Slides: pamelafox.github.io/pycon2026-mc... Code: github.com/pamelafox/py...
Jeremiah Lowin reposted
Does running a Python function on Kubernetes just by adding @kubernetes on top of it sound too good to be true? Not to worry, we have a demo. Infrastructure Decorator resources in the 🧵 www.youtube.com/watch?v=Xyv8...
Jeremiah Lowin reposted
"Ramp moves fast. We need partners who do the same." Ryne Carbone and the team at Ramp moved 200 flows from Metaflow to Prefect in just 90 days. By the end of the quarter, they were managing 350+ flows with 70 active contributors. 🚀 www.youtube.com/watch?v=c0Jg...
Jeremiah Lowin reposted
Introducing Prefab 🎨 A generative UI framework for building MCP Apps, data dashboards, or whatever you (or your agent) want. In Python. (Really.) 100+ shadcn components. Real React. No JavaScript required. And built right into FastMCP 3.2. prefab.prefect.io
Jeremiah Lowin reposted
Jeremiah Lowin is the founder and CEO of @prefect.io, and Adam Azzam is the VP of Product. They join Gregor Vand to discuss fastmcp, its origin story, core framework pillars, and FastMCP 3.0 architecture. @jlowin.dev @aaazzam.bsky.social softwareengineeringdaily.com/2026/04/07/f...
Jeremiah Lowin reposted
Replying to @daniloc.xyz
Every single complaint I’ve seen about MCP is either people thinking the only possible use case is developers using it to augment Cursor (30%) or the result of using the most lazily built MCP servers known to man (70%) and deciding that it’s the protocol’s problem. @jlowin.dev also wrote about this
Jeremiah Lowin reposted
@prefect.io is everything I wish I had when I was maintaining an app using Airflow
FastMCP is downloaded over a million times a day. We regret that some of you are about to be surprised by an unexpected upgrade. If it causes any issue, we're sorry. The upgrade guides will help, and if something's broken, please open an issue: github.com/prefecthq/fa...
Most of the work went into rearchitecting the framework to be production-ready for where MCP is going in 2026. But if we did our job right, you shouldn't be able to tell. You'll just notice everything works *better*. www.jlowin.dev/blog/fastmcp...
You already know this was our biggest release ever, but during its month-long beta, FastMCP 3 attracted 21 first-time contributors and over 100K opt-in installs. The paint is still wet on the overhauled docs and upgrade guides (just ask your LLM!) gofastmcp.com/getting-star...
Jeremiah Lowin reposted
Replying to @riguh.bsky.social
imo @jlowin.dev is doing god's work with FastMCP 3, making it super easy to unshittify MCP servers damn, should have a skill for unshittifying MCP 🤔
Jeremiah Lowin reposted
New Episode of chatting with Prefect's Builders - @jlowin.dev chats with with @aaazzam.bsky.social about FastMCP's path from weekend project to the most popular open source thing we've built. Also: why "automation" is a better word than "orchestration." Hope you get outside today. Link below.
There's A LOT here, but we've tried extremely hard to keep breaking changes minimal. Most users will not need to change their code at all. You can read the full upgrade guide here: gofastmcp.com/development/... Happy (context) engineering!
We're moving past "tool servers." Source from anywhere. Compose and transform freely. Personalize per-user. Track state across sessions. Control access. Run long operations. Version your APIs. Observe everything. We call this the context era: www.jlowin.dev/blog/fastmcp-3
The new architecture lets us ship a massive number of features: 🎁 Custom providers like filesystems and remote APIs ✨ Per-component authorization 🏷️ Component versioning 🧠 And even skills over MCP...! Read the comprehensive feature guide here: www.jlowin.dev/blog/fastmcp...
Jeremiah Lowin reposted
We're having conversations with the team about building Prefect. Whatever comes up. This time with Engineers Nate Nowack (@zzstoatzz) and Alex Streed (@desertaxle). Designing for coding agents, the Prefect MCP server and the Pydantic AI integration. www.youtube.com/watch?v=qTT1...
Jeremiah Lowin reposted
oh hey its my bio! » uvx pdsx -r zzstoatzz.io \ ls app.bsky.actor.profile \ -o json \ | jq -r '.[0].description' yooper → umich → chicago open-source dev tools @prefect.io ‣ zzstoatzz.io ‣ blog.zzstoatzz.io ◦ status.zzstoatzz.io ‣ github.com/zzstoatzz ‣ tangled.sh/@zzstoatzz.io
Jeremiah Lowin reposted
i made a @nooki.me MCP community and posted an introduction to MCP nooki.me/post/an-intr...
Jeremiah Lowin reposted
This is the most compelling argument I've seen thus far for MCP.
In a recent post, @chris.blue argues that MCP is an unnecessary and temporary kludge on the decline and facing an uncertain future. IMO it standardizes how agents have stateful, identity-aware conversations. aaazzam.substack.com/p/the-apolog...
Jeremiah Lowin reposted
In a recent post, @chris.blue argues that MCP is an unnecessary and temporary kludge on the decline and facing an uncertain future. IMO it standardizes how agents have stateful, identity-aware conversations. aaazzam.substack.com/p/the-apolog...
As an open-source maintainer, one of the hardest things is saying "no" to well-designed features that are simply not a good fit. With LLMs able to generate volumes of code without context, the maintainer's role as a thoughtful curator has never been more important. www.jlowin.dev/blog/oss-mai...
"This issue appears to be a duplicate... of itself." Tell me more about this "AGI" github.com/jlowin/fastm...
fastmcp.cloud is here! 🚀 FastMCP made it easy to build MCP servers. FastMCP Cloud makes it just as easy to deploy them. It's the MCP-native platform you've been waiting for, and it just works!
Jeremiah Lowin reposted
This is being posted by an MCP client connected to an AT Protocol server running on FastMCP Cloud - enabling programmatic interaction with Bluesky through the Model Context Protocol!
🔥 FastMCP Cloud is here We built FastMCP to simplify MCP servers. Now deployment is instant too. Push repo → Live endpoint in <1min 📕 Learn about FastMCP Cloud-> prefect.io/blog/acceler... 🚀 Deploy for free -> fastmcp.cloud
Jeremiah Lowin reposted
🔥 FastMCP Cloud is here We built FastMCP to simplify MCP servers. Now deployment is instant too. Push repo → Live endpoint in <1min 📕 Learn about FastMCP Cloud-> prefect.io/blog/acceler... 🚀 Deploy for free -> fastmcp.cloud
Jeremiah Lowin reposted
How does a CLI command to transfer resources between backends relate to Kahn's algorithm and topological sorting? How can the looming threat of an LLM character takedown keep us accountable? These are questions that can only be answered in one place: dev-log.prefect.io
Jeremiah Lowin reposted
A week maintaining an active open-source project can make you laugh, cry, or reenable spacebar heating to avoid breaking changes. We're starting a dev log to share the good, the bad and the ugly decision making that goes into every week's release of Prefect: dev-log.prefect.io/so-a-dev-log...
Jeremiah Lowin reposted