Composio
Giving an agent authenticated access to real applications — Gmail, Slack, GitHub, Jira — without building an OAuth flow per service.
Wiring an agent to one external service is a morning’s work. Wiring it to Gmail, Slack, GitHub, Notion, and Jira is a quarter — because the hard part was never the API call. It’s OAuth per provider, token storage and refresh, per-user credentials, scope management, and rate limits, five times over, before the agent does anything useful.
Composio does that part. It exposes a catalogue of applications as tools an agent can call, and owns the authentication: users connect their accounts at runtime, the platform holds and refreshes the tokens, and your code never sees a credential.
Use it
pip install composio # a TypeScript SDK exists too
from composio import Composio
composio = Composio()
# a user connects their own account; the OAuth dance is the platform's problem
request = composio.toolkits.authorize(user_id="user-42", toolkit="GITHUB")
print(request.redirect_url)
# hand the tools to whatever agent framework you're using
tools = composio.tools.get(user_id="user-42", toolkits=["GITHUB", "SLACK"])
The tools arrive in the shape your framework expects — OpenAI tool definitions, LangChain tools, CrewAI, the Anthropic SDK — so it slots into an existing agent rather than asking you to adopt a new one.
There’s also an MCP endpoint, which is the shortest path of all: one server address gives an MCP-capable client access to the catalogue, instead of installing and configuring one MCP server per application.
What it’s actually solving
| Problem | Without | With |
|---|---|---|
| OAuth per provider | You build and maintain each flow | Handled, including refresh |
| Per-user credentials | Your database stores tokens | Held by the platform, scoped per user |
| Tool definitions | Hand-written per API | Generated, in your framework’s format |
| Multi-app workflows | Glue code between clients | One interface across the catalogue |
Multi-tenancy is the case where this pays for itself. “Every user connects their own Slack” is a genuinely hard thing to build safely and a configuration line here.
Before you build on it
- You are handing a third party your users’ OAuth tokens. That’s the trade, and it’s a real one: read the security and data-handling terms, and check whether your compliance position allows it. The project is MIT-licensed with a self-hostable option if not.
- Free tiers move. Usage-based pricing with a monthly free allowance of tool calls is the current shape; check the numbers against your expected volume rather than inheriting someone’s blog post.
- Give agents the smallest toolkit that works. An agent holding twenty applications makes worse decisions than one holding three, and the blast radius of a mistake is larger. Scope by task.
- Confirm before consequential actions. A tool that sends email or closes tickets should be behind a human confirmation until you trust it — the platform grants access, it doesn’t supply judgement.
Where it fits
If your agent only needs your own APIs, you don’t need this: define the tools yourself and keep the surface small. Composio earns its place when the agent must reach other people’s software on your users’ behalf, and the authentication — not the logic — is what’s standing between you and shipping.
Next
An agent that can act still needs to know things → Exa
Last updated 25 Aug 2026, 00:00 UTC.