Installing MCPs

Add to Claude

Claude (claude.ai and Claude Desktop) connects to any mcp.build MCP as a remote MCP custom connector. Every MCP's page has an "Add to Claude" button that opens Claude's connector settings with the name and URL already filled in:

1. Click "Add to Claude"On any MCP's page — it opens claude.ai/customize/connectors with a pre-filled "Add custom connector" form
2. Review and confirmCheck the connector name and URL, then click Add
3. Authorize, if askedSome MCPs require an auth header or token — the MCP's own page will say if one is needed
4. Start promptingAsk Claude to do the thing the MCP does — it will call the right tool automatically

Prefer to add it by hand instead of using the button? Open claude.ai/customize/connectors, click the + button, choose Add custom connector, and paste in the MCP's endpoint URL yourself.

Claude Code / CLI

If you use Claude Code, add any mcp.build MCP as a remote server from the command line:

claude mcp add <name> <mcp-endpoint-url>

Other MCP clients

Any MCP-compatible client works the same way — add the MCP's endpoint URL as a remote server in the client's MCP settings:

Finding an endpoint

Every MCP's endpoint URL is shown at the top of its docs page in a copyable box, and also listed in the machine-readable agents.json catalog under each agent's endpoint field. For example, send-email's endpoint is:

See all available MCPs for the full list.

Troubleshooting

• Connector doesn't appear

  Refresh claude.ai/customize/connectors — new connectors can take a few seconds to register.

• Tool isn't called

  Make sure the connector is enabled for the conversation (check the tools/connectors picker), and phrase the request the way the MCP's example prompt does.

• Auth errors

  Some MCPs need an API key or header — check that MCP's own docs page for any required setup.