# Composio documentation

Research date: 2026-09-07

Documentation coverage: partial.

Reference index, not a mirror of complete vendor documentation. Retrieved pages do not prove the MCP works.

## What it does

A hosted integration/auth platform that lets AI agents and MCP clients call actions across 1,000+ SaaS apps (HubSpot, Slack, Gmail, GitHub, Notion, Stripe, and others) through Composio-managed OAuth.

## Access and connection

MCP support: official

Access requirements: free (100K tool calls/mo, 50K trigger events/mo, unlimited connections on the Free plan, no credit card)

Authentication: Composio brokers OAuth for each connected toolkit (HubSpot, Gmail, Slack, etc.) on the user's behalf, then gates the MCP endpoint itself with an x-api-key header (required by default for new orgs). MCP endpoint pattern is https://backend.composio.dev/v3/mcp/{server_id}?user_id={user_id}.

Research checked: 2026-09-07

These details come from catalog research. Check vendor sources for current setup instructions; this is not proof of a tested connection.

## Sources

- https://composio.dev
- https://composio.dev/pricing
- https://docs.composio.dev/docs/single-toolkit-mcp
- https://github.com/ComposioHQ/GHMCP
- https://connect.composio.dev/mcp

## Retrieved pages

- https://docs.composio.dev/docs/single-toolkit-mcp (fetched)
- https://github.com/ComposioHQ/GHMCP/issues (fetched)
- https://github.com/ComposioHQ/GHMCP/actions (fetched)
- https://github.com/ComposioHQ/GHMCP/pulls (fetched)
- https://github.com/ComposioHQ/GHMCP/pulse (fetched)
- https://github.com/ComposioHQ/GHMCP/forks (fetched)
- https://github.com/ComposioHQ/GHMCP/tags (fetched)
- https://github.com/ComposioHQ/GHMCP (fetched)
- https://github.com/ComposioHQ/GHMCP/activity (fetched)