mcp.build hosts open-source MCP servers so your agent can take real action — send emails, run Python, and more — with nothing to deploy and nothing to configure. Copy an endpoint, connect it in seconds, and give your agent new superpowers.
Every MCP is already running. No servers, no infra — just a URL you paste and go.
MCPs on mcp.build are designed to take natural-language prompts and turn them into the right tool calls. No rigid schemas, no boilerplate.
Every MCP is open source. Inspect the code, self-host it, or contribute your own.
Hosted, ready-to-connect MCP servers. Pick one, copy its endpoint, and your agent is ready to go.
Send emails from natural language prompts.
https://next.hal9.ai/mcp/mcpbuild/send-email
Run Python and install packages from natural language prompts.
https://next.hal9.ai/mcp/mcpbuild/run-python
New to MCPs? Learn how to install MCPs.
Machine-readable catalog: agents.json
· Agent instructions: llms.txt
· Want to add one? See contributing on GitHub