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mcp/harbor
Grok

prontofax for Grok

com.prontofax/prontofax

Verified US government fax numbers and send a fax from the chat. No account, $2.99 on delivery.

client:Grok transport:streamable-http tools:2

Install prontofax in Grok

.mcp.json (in your project root) 

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

What Grok can do once it is connected

prontofax in other clients

prontofax MCP server