FaxOnline MCP

An official MCP server provided by FaxOnline that allows AI agents to prepare PDF faxes for US recipients. The server exposes tools to store documents, generate checkout links for one-time payments via Stripe, and track transmission status, ensuring human authorization before any fax is sent.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-18Operated by FaxOnline

MCP endpoint (Streamable HTTP)

https://faxonline.app/mcp/fax

Vendor documentation

What you can do with it

Prepare a PDF document for fax transmission to a US number
Generate a secure checkout link for one-time payment authorization
Track the delivery status of a fax after payment is completed

Tools advertised by the last live check:

prepare_fax
get_fax_status

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http faxonline-mcp https://faxonline.app/mcp/fax

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add faxonline-mcp --url https://faxonline.app/mcp/fax

Cursor

Merge this server into .cursor/mcp.json in your project, then enable faxonline-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "faxonline-mcp": {
      "url": "https://faxonline.app/mcp/fax"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "faxonline-mcp": {
      "type": "streamableHttp",
      "url": "https://faxonline.app/mcp/fax",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start faxonline-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "faxonline-mcp": {
      "type": "http",
      "url": "https://faxonline.app/mcp/fax"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http faxonline-mcp https://faxonline.app/mcp/fax

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "faxonline-mcp": {
      "url": "https://faxonline.app/mcp/fax"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "faxonline-mcp": {
      "serverUrl": "https://faxonline.app/mcp/fax"
    }
  }
}

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