cursor__plugins/third_party/agentmail

AgentMail

Cursor plugin that connects agents to AgentMail through AgentMail's official hosted Model Context Protocol server.

Give agents their own inboxes: create addresses, send and receive mail, search threads, and manage drafts and attachments.

Install

1. Open Cursor Settings → Plugins.
2. Search for AgentMail.
3. Click Install, then set your AgentMail API key (below).

Or run /add-plugin agentmail in chat.

MCP

{
  "mcpServers": {
    "agentmail": {
      "type": "http",
      "url": "https://mcp.agentmail.to/mcp",
      "headers": {
        "x-api-key": "${AGENTMAIL_API_KEY}"
      }
    }
  }
}

What agents can do

Category	Capabilities
Inboxes	List, get, create, update, and delete agent inboxes
Threads	List, search, get, update, and delete conversations
Messages	List, search, send, reply, forward, and update messages; fetch attachments
Drafts	Create, list, get, update, send, and delete drafts

The hosted runtime is the source of truth for tool names and schemas. Call list_inboxes as a read-only smoke test after connecting.

Setup

No credential ships with this plugin — it carries only a ${AGENTMAIL_API_KEY} placeholder, and each install supplies its own key.

1. Open the AgentMail console.
2. Go to Settings → API Keys and create a key.
3. Copy the full value, including the am_ prefix.
4. In Dashboard → Plugins → Configure, set AgentMail API key to that value.

Tool calls run with that key's organization, pod, and inbox scope. Rotate or revoke the key from the console if it is ever exposed.

Prefer the x-api-key header (what this plugin ships). Query-string keys end up in logs and history. AgentMail also accepts Authorization: Bearer <am_...> if a client requires that form.

Docs

• AgentMail MCP (Cursor API key): https://www.agentmail.to/docs/integrations/mcp#cursor-api-key
• Hosted server: https://mcp.agentmail.to/mcp
• Console: https://console.agentmail.to
• MCP implementation: https://github.com/agentmail-to/agentmail-mcp

Logo is AgentMail's official GitHub organization mark.

License

MIT