SingleFax MCP server

SingleFax is the official remote MCP server from singlefax.com. It answers at https://singlefax.com/mcp over streamable HTTP and asks you to sign in with your singlefax.com account before it lists its tools, so your client opens a login the first time it connects. Our probes reached it 6 of 6 times since 10 September 2026; the last check, on 19 October 2026, got the sign-in challenge, so it is up.

Send a fax from Claude, ChatGPT, or Cursor. Upload a PDF, pay, get delivery status.

Description as the publisher wrote it.

What SingleFax needs before it works

A sign-in. The server refused to list its tools to an anonymous client and answered with an authentication challenge, which is how an MCP server protected by OAuth behaves. Add it with one of the setups below; the first connection opens a login for your singlefax.com account, and the tools appear once you have approved it.

Add SingleFax to your AI client

Every block below points at https://singlefax.com/mcp. Pick your client and copy.

claude mcp add --transport http singlefax https://singlefax.com/mcp

{
  "mcpServers": {
    "singlefax": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://singlefax.com/mcp"]
    }
  }
}

{
  "mcpServers": {
    "singlefax": {
      "url": "https://singlefax.com/mcp"
    }
  }
}

{
  "servers": {
    "singlefax": {
      "type": "http",
      "url": "https://singlefax.com/mcp"
    }
  }
}

{
  "context_servers": {
    "singlefax": {
      "url": "https://singlefax.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "singlefax": {
      "serverUrl": "https://singlefax.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "singlefax": {
      "url": "https://singlefax.com/mcp"
    }
  }
}

name: SingleFax
version: 0.0.1
schema: v1
mcpServers:
  - name: SingleFax
    type: streamable-http
    url: https://singlefax.com/mcp

{
  "mcpServers": {
    "singlefax": {
      "httpUrl": "https://singlefax.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "singlefax": {
      "type": "http",
      "url": "https://singlefax.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "singlefax": {
      "url": "https://singlefax.com/mcp"
    }
  }
}

goose://extension?url=https%3A%2F%2Fsinglefax.com%2Fmcp&type=streamable_http&id=singlefax&name=SingleFax

Is SingleFax up right now?

It answered our last check on 19 October 2026 in 291 ms. Over 6 checks since 10 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.

MCP servers similar to SingleFax

Questions about SingleFax

Is there an official SingleFax MCP server?

Yes. It is published by singlefax.com and served from singlefax.com, the vendor's own domain: https://singlefax.com/mcp.

How do I sign in to SingleFax?

Add the server with a setup above. The first time your client connects it opens the sign-in page for singlefax.com; approve it and the tools load.

Is SingleFax down?

It answered our last check on 19 October 2026 in 291 ms. Over 6 checks since 10 September 2026 it answered 6.

How do I add SingleFax to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://singlefax.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does SingleFax need an API key?

It needs a sign-in rather than a key you paste: the server answered with an authentication challenge, so your client runs the login when it first connects.

Where this comes from

Publisher: com.singlefax. Endpoint host: singlefax.com. ARD identifier: urn:air:com.singlefax:mcp:mcp. First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.