Intégrations

AgentSend works with any AI agent framework. Use the REST API directly or follow one of the framework-specific guides below.

Overview

AgentSend exposes a simple REST API, so it fits naturally into any agent stack. Whether you're building with a high-level orchestration framework or calling the API by hand, the same primitives apply: create an inbox, send a message, read replies.

ℹ

All integrations use the same underlying REST API. Framework-specific guides just show you how to wire it in idiomatically for each tool.

Framework Integrations

Pick your framework for a step-by-step guide, including tool definitions, example agents, and webhook handling.

🧭

LangChain

Build email tools for LangChain agents. Works with LCEL, LangGraph, and the legacy AgentExecutor.

🚀

CrewAI

Add email capabilities to CrewAI crews. Expose send, read, and thread tools to any agent in your crew.

⚡

OpenAI Agents

Connect OpenAI function-calling agents to email using the Responses API or Assistants tool_call format.

🚀

Claude MCP

Use AgentSend as an MCP server. Claude picks up send_email, list_messages, and reply_to_thread as native tools.

Direct API

For any framework not listed above, call the REST API directly. Every language with an HTTP client works out of the box.

javascript — fetch

await fetch(`https://api.agentsend.io/inboxes/${inboxId}/messages`, {
  method: "POST",
  headers: {
    "x-api-key": process.env.AGENTSEND_API_KEY,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    to: ["user@example.com"],
    subject: "Hello from my agent",
    bodyText: "This was sent by an AI agent via AgentSend.",
  }),
});

bash — curl

curl -X POST https://api.agentsend.io/inboxes/$INBOX_ID/messages \
  -H "x-api-key: $AGENTSEND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": ["user@example.com"],
    "subject": "Hello from my agent",
    "bodyText": "This was sent by an AI agent via AgentSend."
  }'

See the API Reference for the full list of endpoints, request schemas, and response examples.

Claude Code & Cursor

AgentSend exposes a /skill endpoint for MCP tool integration. Add it to your mcp_servers config and Claude Code or Cursor will automatically discover send_email, list_messages, and reply_to_thread as callable tools.

json — .claude/mcp_servers.json

{
  "mcpServers": {
    "agentsend": {
      "command": "npx",
      "args": ["agentsend-mcp"],
      "env": {
        "AGENTSEND_API_KEY": "your-api-key",
        "AGENTSEND_INBOX_ID": "your-inbox-id"
      }
    }
  }
}

💡

For a full walkthrough of the MCP setup, see the Claude MCP integration guide.

Community

Using AgentSend with a framework not listed here? We'd love to see it. Share your integration on our Discord and we'll feature it in the docs.

Join the AgentSend Discord →

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