Composio

Composio is a developer platform that connects AI agents to the apps they need. It gives tools like Claude and Codex secure, authenticated access to more than 1,500 applications, from Gmail and Slack to Salesforce and GitHub. Composio handles the hard part: connecting all those apps securely. A free tier gets you started, with paid plans for heavier use. The platform is SOC 2 Type II certified, so security teams can trust it. It works with frameworks like LangChain, CrewAI, and the Vercel AI SDK.

Key Features

1. 1,500+ app integrations

One platform connects agents to more than 1,500 apps, from email and chat to CRM and code hosting. You skip building each integration by hand.

2. Auth handled for you

Composio manages OAuth tokens and refreshes behind the scenes. Your agent never sees raw passwords or API keys.

3. Managed MCP gateway

A single endpoint exposes every connected tool to Claude Code, Cursor, Codex, or any agent that speaks MCP, the open standard for connecting AI tools.

4. Smart tool router

The router loads only the tools a task needs, keeping the agent's context small. That cuts token waste on every run.

5. Developer-first tooling

Python and TypeScript SDKs, a command-line tool, and full tool-call logs make it easy to build and audit agents.

Frequently Asked Questions (FAQ)

How is Composio different from Zapier?

Zapier runs fixed, step-by-step recipe flows. Composio gives an AI agent authenticated tools, and the agent decides at runtime which tool to call. It is built for agents that act in code, not for scheduled syncs.

What happens to my API keys?

They stay with Composio, encrypted at rest and in transit. Tokens are injected on the server side when a tool runs. Your agent never sees the raw credentials.

Is there a program for startups?

Yes. Early-stage startups can apply to the Composio startup program for extended credits and priority support. It is meant for teams building a real product on the platform.

Do I pay per user seat?

No. You pay for the tool calls your agents make, not for seats. The free tier covers 20,000 calls a month, and paid tiers raise that limit.

Conclusion

Composio solves the boring but hard part of agent building: talking to other apps. Managed auth, 1,500 integrations, and a single MCP gateway save weeks of plumbing work. The free tier is enough to ship a prototype, and usage-based pricing grows with you. If your agents must act across many tools, it is worth testing.