Replace generic email tools with MultiMail's purpose-built agent email — adding graduated trust and oversight to Composio's 250+ integration ecosystem.
Composio provides 250+ pre-built tool integrations for AI agents, handling authentication, rate limiting, and schema management. While Composio offers generic email tools, MultiMail provides purpose-built email infrastructure with agent-specific features like graduated oversight modes that generic integrations lack.
By using MultiMail through Composio's custom tool system, your agents get email capabilities designed for the trust ladder: start in gated_send mode where every email requires human approval, and progress to autonomous as trust builds. This is a fundamentally different approach from generic SMTP or Gmail integrations.
Integration uses Composio's custom action system. Define MultiMail API calls as custom actions, and any framework connected to Composio (LangChain, CrewAI, OpenAI) can use them.
Composio's standard email integrations send immediately. MultiMail adds graduated oversight (read_only, gated_all, gated_send, monitored, autonomous) that generic email tools simply don't provide.
Define MultiMail tools once in Composio, and they work with every framework Composio supports — LangChain, CrewAI, OpenAI, and more. One integration, universal access.
MultiMail's API is designed for programmatic access by agents, not human users clicking buttons. Every action has structured inputs and outputs that agents can reason about.
Use Composio's 250+ integrations alongside MultiMail email. Your agent can check a CRM via Composio, then send a follow-up email via MultiMail with full oversight controls.
No code, no dashboard. Paste this to your AI agent — it connects MultiMail, creates an inbox, and builds the flow for you.
Sign up at multimail.dev, create a mailbox, and generate an API key from your dashboard. Your key will start with mm_live_.
Install the Composio SDK and the adapter for your preferred framework.
Define custom actions in Composio that wrap MultiMail API calls for send, inbox, reply, and contact management.
Use Composio's framework adapter (composio-langchain, composio-crewai, etc.) to make MultiMail tools available to your agents.
Review emails queued by your agents in the MultiMail dashboard. All emails from gated_send mode require approval before delivery.
Email infrastructure built for AI agents. Verifiable identity, graduated oversight, and a hosted MCP server. Formally verified in Lean 4.