Composio — 250+ pre-built tool integrations for AI agents.

TL;DR — Composio is a tool integration platform for AI agents. It provides 250+ pre-built integrations (GitHub, Slack, Gmail, Jira, Salesforce, databases, file systems…) with managed OAuth, auth, and API handling. Plug tools into LangChain, CrewAI, AutoGen, or any framework with one line. The agent calls tools; Composio handles the auth and API translation.

What it is

Composio is a managed service + SDK that turns SaaS APIs into agent-ready tools. Each integration comes with pre-defined actions (e.g., "create GitHub issue", "send Slack message", "query Salesforce") that are already formatted as tool schemas. You connect a user's account via OAuth, and the agent can call those actions without you writing API glue code.

Why it exists

Building tool integrations is 80% auth and API wrangling, 20% actual logic. Every team writing agents ends up building the same GitHub/Slack/email connectors. Composio centralizes that: managed OAuth flows, token refresh, rate limiting, and error handling across hundreds of services.

Install & setup

pip install composio-core composio-langchain
composio login   # authenticate with Composio
composio add github   # connect a GitHub account

Usage with LangChain

from composio_langchain import ComposioToolSet, Action
from langchain.agents import create_agent
from langchain_openai import ChatOpenAI

toolset = ComposioToolSet()
tools = toolset.get_tools(actions=[Action.GITHUB_CREATE_ISSUE])

agent = create_agent(
    model=ChatOpenAI(model="gpt-4o"),
    tools=tools,
)
agent.invoke({"messages": [{"role": "user",
    "content": "Create a GitHub issue titled 'Fix login bug' in repo myorg/myapp"}]})

Available actions

Each integration exposes typed actions: GITHUB_CREATE_ISSUE, SLACK_SEND_MESSAGE, GMAIL_SEND_EMAIL, JIRA_CREATE_TICKET, NOTION_CREATE_PAGE, and hundreds more. Filter by app or use-case:

tools = toolset.get_tools(apps=["github", "slack"])  # all actions for these apps

When to use, when to skip

Use it when your agent needs to interact with SaaS tools and you don't want to build OAuth + API wrappers yourself. Massive time saver for agents that work across multiple services.

Skip it when you only need one or two simple API calls (just write the tool directly), or when you need deep customization of API interactions.

vs the alternatives

Tool	Best for	Trade-off
Composio	250+ managed SaaS integrations	Hosted dependency, cost
Custom @tool functions	Full control, simple APIs	You build everything
MCP servers	Standardized tool protocol	Fewer pre-built integrations

Verified against Composio docs (docs.composio.dev), May 2026.