Faxdrop Mcp

@klodr

About Faxdrop Mcp

Send real faxes from any MCP-enabled AI assistant. Wraps the FaxDrop API (PDF/DOCX/JPG/PNG, international numbers, status polling) with rate limits, dry-run mode, audit logging, outbox jail, and 3-layer phone gate (TYPE → COUNTRY → per-number pairing).

#fax #faxdrop #communications #healthcare #legal #mcp-server

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "faxdrop": {
      "command": "npx",
      "args": [
        "-y",
        "faxdrop-mcp"
      ],
      "env": {
        "FAXDROP_API_KEY": "fd_live_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
      }
    }
  }
}

Tools

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Overview

What is Faxdrop Mcp?

Faxdrop Mcp is a Model Context Protocol (MCP) server that lets AI assistants (Claude, Cursor, Continue, OpenClaw, etc.) send real faxes through the FaxDrop API. It wraps the FaxDrop hosted fax service’s HTTP API, targeting users who still need faxing for US healthcare, government forms, and legal/financial workflows.

How to use Faxdrop Mcp?

Install globally via npm install -g faxdrop-mcp or run directly with npx faxdrop-mcp. Set the FAXDROP_API_KEY environment variable (get your key at faxdrop.com/account) and configure the server in your MCP client’s mcpServers JSON. Three tools are exposed: faxdrop_send_fax, faxdrop_pair_number, and faxdrop_get_fax_status.

Key features of Faxdrop Mcp

Input validation (absolute path, file extension, 10 MB cap)
TOCTOU-safe file read with continuous size enforcement
No secret leakage in error objects or audit logs
Dry-run mode via FAXDROP_MCP_DRY_RUN=true
JSONL audit log with FAXDROP_MCP_AUDIT_LOG
3-layer phone gate (type → country → paired number whitelist)

Use cases of Faxdrop Mcp

Send signed healthcare forms directly from an AI assistant
Deliver government document faxes without leaving a chat interface
Automate legal/financial fax workflows with agent safeguards
Test fax prompts safely with dry-run before real sending

FAQ from Faxdrop Mcp

How do I get a FaxDrop API key?

Sign up at faxdrop.com/account to obtain your key. Set it as the FAXDROP_API_KEY environment variable when running the server.

Can I test faxing without actually sending a fax?

Yes. Set the environment variable FAXDROP_MCP_DRY_RUN=true to simulate sending and validate prompts without incurring cost.

What file formats and size limits are supported?

You can send PDF, DOCX, JPG, and PNG files up to 10 MB. The server validates the file extension and size before opening the file.

Is there a free tier available?

Yes, FaxDrop offers a free tier that includes 2 faxes per month.

How does the phone gate security work?

The server enforces a three-layer whitelist: fax type, country, and per-number pairing. Numbers must be added via the faxdrop_pair_number tool (human-in-the-loop approval) before they can be used.

Frequently asked questions