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mcp/harbor
Grok

Fax.Plus for Grok

plus.fax.app/mcp

Send and receive faxes from any MCP-compatible AI assistant using the Fax.Plus API

client:Grok transport:streamable-http

Install Fax.Plus in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "mcp": {
      "type": "http",
      "url": "https://mcp.fax.plus/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

Fax.Plus in other clients

Fax.Plus MCP server