Show HN: Largest Open Source MCP Repo (280) (opens in new tab)

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