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mcp/harbor
Grok

AgentFirstStack Mail for Grok

com.agentfirststack/mail

Email inboxes for AI agents: wait for mail, pull out verification codes and links, reply. Free.

client:Grok transport:streamable-http

Install AgentFirstStack Mail in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "mail": {
      "type": "http",
      "url": "https://mail.agentfirststack.com/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

AgentFirstStack Mail in other clients

AgentFirstStack Mail MCP server