Tool integration platform that connects AI agents to 1,000+ external services with managed authentication, sandboxed execution, and framework-agnostic connectors for LangChain, CrewAI, AutoGen, and OpenAI function calling.
Connects your AI agents to 1,000+ business tools like Gmail, Slack, and Salesforce — so your AI can actually do things in the real world with managed authentication and sandboxed execution.
Composio is a tool integration platform that gives AI agents access to 1,000+ external services through a unified API. Rather than building individual API integrations for each service your agent needs — handling OAuth flows, API versioning, rate limiting, and schema differences — Composio provides pre-built, authenticated connections to tools like GitHub, Slack, Gmail, Salesforce, Jira, and hundreds more.
The core value proposition is eliminating the 'last mile' problem in agent development. Building a capable agent is one challenge; giving it reliable access to the tools it needs is another entirely. Composio handles authentication (OAuth2, API keys, JWT), maintains connections, and exposes each tool's actions through a consistent interface that works with major agent frameworks including LangChain, CrewAI, AutoGen, LlamaIndex, and OpenAI's function calling.
The platform organizes tools into actions — discrete operations like 'create GitHub issue', 'send Slack message', or 'query Salesforce contacts'. Each action has a well-defined schema that maps directly to function calling formats, so LLMs can understand what parameters are needed and what the action will return.
Composio manages per-user authentication through 'Entities' — each user can connect their own accounts, and agents operate with appropriate permissions. This is critical for multi-tenant applications where different users need agents that act on their behalf.
The platform includes built-in execution environments: agents can run code, manage files, interact with shells, and access browsers within sandboxed environments (Docker, E2B, Fly.io). This gives agents both tool access and compute environment without separate infrastructure.
Composio also provides an official MCP (Model Context Protocol) server implementation, enabling standardized agent tool integration through the emerging MCP standard. Just-in-time tool calls, secure delegated auth, and parallel execution across apps are supported.
Honest assessment: Composio saves enormous development time if your agents need to interact with SaaS tools. Without it, you'd spend days per integration handling auth flows and API quirks. The tradeoff is dependency on a third-party service for a critical part of your agent stack. For agents that primarily do reasoning or work with your own APIs, Composio adds unnecessary overhead. But for 'do things in the real world' agents, it's the most comprehensive option available.
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Composio provides the widest selection of pre-built tool integrations for AI agents with a generous free tier of 20,000 tool calls/month. The managed authentication and Entity model solve genuinely hard problems in multi-tenant agent development. Quality of individual integrations varies, but breadth is unmatched. The 200-500ms latency overhead and cloud dependency are real tradeoffs. Best for teams building agents that need to interact with multiple SaaS tools; overkill if your agent only needs one or two integrations.
Ready-to-use integrations for GitHub, Slack, Gmail, Google Calendar, Salesforce, HubSpot, Jira, Notion, Trello, Linear, and hundreds more. Each includes multiple typed actions with parameter schemas for just-in-time tool calls.
Use Case:
Handles OAuth2 flows, API key management, JWT tokens, and session management. Supports per-user authentication through Entities with secure credential isolation for multi-tenant applications.
Use Case:
Native integrations with LangChain, CrewAI, AutoGen, LlamaIndex, and OpenAI function calling. Tools are automatically formatted for each framework's expected schema with no manual mapping required.
Use Case:
Managed environments where agents can execute code, manipulate files, run shell commands, and interact with browsers. Supports Docker, E2B sandboxes, and Fly.io instances with parallel execution.
Use Case:
Filters available actions by use case, tags, or semantic relevance to reduce the tool set presented to the LLM. Prevents context window bloat and improves action selection accuracy.
Use Case:
Official Model Context Protocol server implementation for standardized agent tool integration, enabling interoperability with any MCP-compatible agent framework.
Use Case:
Free
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$29.00/month
month
$229.00/month
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Custom
Ready to get started with Composio?
View Pricing Options →Building AI assistants that connect to each user's personal Gmail, Calendar, Slack, and CRM accounts while maintaining secure credential isolation and data separation
Creating agents that automate cross-tool business processes — Jira ticket creation from customer emails, Salesforce updates from meeting notes, Slack notifications from pipeline changes
Setting up agents that automatically respond to real-time triggers like new GitHub issues, incoming support emails, or Slack mentions to triage, categorize, and take action
Adding real-world tool capabilities to LangChain, CrewAI, or AutoGen agents in minutes rather than weeks, enabling fast iteration on agent architectures without rebuilding integrations
Composio works with these platforms and services:
We believe in transparent reviews. Here's what Composio doesn't handle well:
Composio uses an 'Entity' model where each user has their own connected accounts. When a user connects a service, Composio handles the OAuth flow and stores tokens securely. Agents reference the entity ID to use the correct credentials, enabling multi-tenant applications with isolated data access.
Since tool calls route through Composio's servers, an outage prevents agents from accessing external tools through Composio. For critical systems, implement fallback logic with direct API calls for essential tools. Composio publishes uptime status and provides webhook notifications for service incidents.
Yes. Composio supports custom actions where you define the schema, implementation, and auth method. You can also use OpenAPI import to automatically generate actions from any OpenAPI/Swagger specification. Custom actions work identically to built-in ones across all framework integrations.
Each tool call counts against your monthly quota. The free tier includes 20,000 calls, Growth includes 200,000 for $29/month, and Business includes 2,000,000 for $229/month. Overage is $0.299 per 1,000 calls on Growth and $0.249 per 1,000 on Business. A typical agent workflow performing 5-10 actions per task means the free tier supports roughly 2,000-4,000 agent tasks per month.
The Composio SDK and core framework are open source on GitHub, allowing inspection, contribution, and understanding of how integrations work. The managed authentication, hosting, and action execution infrastructure is a cloud service. You can self-host the open-source components, but managed auth and triggers require Composio cloud or enterprise self-hosted deployment.
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Composio expanded to 1,000+ app integrations with just-in-time tool calls and parallel execution. Added official MCP server support for standardized agent tool integration. Pricing restructured with a generous free tier (20,000 calls/month), Growth at $29/month (200K calls), and Business at $229/month (2M calls).
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