Composio

Composio provides SDKs that let developers equip AI agents and large‑language‑model applications with live access to thousands of external services. The TypeScript and Python libraries expose a unified API for retrieving tool definitions, invoking them, and handling authentication, allowing agents to call APIs such as Gmail, Slack, Notion, GitHub, and a curated list of over 250 pre‑built integrations. The platform manages OAuth flows, sandboxed execution, and parallel calls, so the agent can request the right tool at the right time without manual configuration.

The SDKs are framework‑agnostic and can be paired with OpenAI, Anthropic, or other provider agents. Users initialise a client with an API key and optionally a provider wrapper, then fetch a set of tools for a given user and pass them to an agent. The agent’s prompt can reference those tools, and the SDK coordinates the execution, returning the external data to the model for further reasoning.

Composio is released under the Elastic‑2.0 license, offers a self‑hostable free tier without subscription requirements, and is marked as stable. It targets developers building autonomous agents that need dynamic, secure, and scalable access to a wide range of third‑party applications.