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mcp/harbor
Grok

Postfleet for Grok

ai.postfleet/postfleet

Give an AI agent its own email address: send, reply, read, and wait for mail.

client:Grok transport:streamable-http runtime:npm

Install Postfleet in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "postfleet": {
      "type": "http",
      "url": "https://api.postfleet.ai/api/mcp"
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

Postfleet in other clients

Postfleet MCP server