Largest Open Source MCP Repo (280)
Ash here, founder of Activepieces (open source automation). 2 years ago, we launched Activepieces as the open source Zapier (https://news.ycombinator.com/item?id=34723989). Ever since, we grew total integrations (pieces) to 280 of which 60% were built by our community! Now with the growing popularity of MCP, we built tools around these to turn them into MCP servers. So now every open source integration on Activepieces is an MCP, and we like to think it’s the largest open source MCP repo so far (MIT licensed). With these tools, you can: - Self host the MCP server or use our…
What it does
In the maker’s words, at launch
Ash here, founder of Activepieces (open source automation). 2 years ago, we launched Activepieces as the open source Zapier (https://news.ycombinator.com/item?id=34723989). Ever since, we grew total integrations (pieces) to 280 of which 60% were built by our community! Now with the growing popularity of MCP, we built tools around these to turn them into MCP servers. So now every open source integration on Activepieces is an MCP, and we like to think it’s the largest open source MCP repo so far (MIT licensed). With these tools, you can: - Self host the MCP server or use our cloud for free. - Connect any of the 280 tools in your MCP server. - Provide the server to an MCP client (like Claude Desktop, Cursor or Windsurf). - Ask the LLM to take actions! For example, you can ask the LLM to: - Add meetings to your calendar. - Check your tasks on Jira. - Post a tweet for you. In the next few weeks, we’ll make the automation flows available as MCPs too. and we will make MCPs usable by LLMs inside our flows. - List of MCPs and instructions: https://www.activepieces.com/mcp - GitHub repo: https://github.com/activepieces/activepieces
Does the same job
all alternatives →More dev tools this month
the category →



Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com

OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com

Launched alongside, April 2025
the whole month →- IB
Hi everyone, I built PyXL — a hardware processor that executes a custom assembly generated from Python programs, without using a traditional interpreter or virtual machine. It compiles Python -> CPython Bytecode -> Instruction set designed for direct hardware execution. I’m sharing an early benchmark: a GPIO test where PyXL achieves a 480ns round-trip toggle — compared to 14-25 micro seconds on a MicroPython Pyboard - even though PyXL runs at a lower clock (100MHz vs. 168MHz). The design is stack-based, fully pipelined, and preserves Python's dynamic typing without static type restrictions.…
Dev tools · 2025 · runpyxl.com
- UC
Life & fun · 2025 · filiph.github.io
- IB
https://the-pocket.github.io/Tutorial-Codebase-Knowledge/
AI · 2025 · github.com


