# PayPerFax [Health: Active]

**Category:** 💻 Developer Tools  
**Repository:** https://github.com/payperfax/fax-mcp  
**GitHub Stars:** 0  
**Views:** 0  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/payperfax

## Description
Send a fax from AI. Pay per fax. No registration or subscription. Pay only for successful faxes.

## Tools
Capabilities this server exposes over MCP:

- **create_fax** — Prepares a fax and returns a link. The assistant gives the fax number, your email address, and either a letter it wrote (Markdown) or a notice that a file is still needed
- **get_fax_status** — Reads the status of a fax: queued, sending, delivered or failed
- **list_supported_formats** — Lists the input types, the size limits and the languages

## Claude Desktop Quick Installation
Remote MCP endpoint (confidence: high). Install path detected from listing signals. Add as a URL/SSE server in your client:

```json
"mcpServers": {
  "payperfax": {
    "url": "https://fax.payperfax.com/mcp"
  }
}
```

## Documentation

## What PayPerFax MCP server does

The PayPerFax MCP server lets an AI assistant prepare a fax without handling payment directly. The assistant can provide a destination fax number, an email address, and either a Markdown letter it generated or a notice that the user still needs to attach a file. The service returns a link where the user can review the fax, see its price, add a file when needed, and pay in a browser.

No account, subscription, or API key is required. The hosted endpoint is available at `https://fax.payperfax.com/mcp`.

## How it works

The connection uses Streamable HTTP and does not require authentication. After the assistant calls `create_fax`, the user opens the returned link and completes the review and payment flow. Nothing is sent or charged before payment. A person—not the assistant—authorizes and pays for each fax.

For generated correspondence, Markdown text supplied by the assistant becomes the fax document. MCP does not transfer files from a chat application to the server, so users with signed forms, scans, or PDFs add those files in the browser after opening the pre-filled link. Coding agents with shell access can also send a file over HTTP using the separate PayPerFax API, but that API is outside the MCP tool set described here.

## Setup and configuration

Add a custom MCP server in a compatible client’s connector or integration settings. Use `PayPerFax` as the name and `https://fax.payperfax.com/mcp` as the URL, then enable the connection. The assistant should be told the user’s country so the displayed price can use the appropriate currency.

Gemini CLI can install the repository extension with:

```sh
gemini extensions install https://github.com/payperfax/fax-mcp --ref main
```

The extension connects to the hosted service; it does not run the server locally. Use `/mcp` in Gemini CLI to inspect the connection and available tools.

## Tools and capabilities

The PayPerFax MCP server exposes three tools:

- `create_fax` prepares a fax and returns a payment and review link. Inputs include the fax number, email address, and either Markdown content or an indication that a file is required.
- `get_fax_status` reports whether a fax is `queued`, `sending`, `delivered`, or `failed`.
- `list_supported_formats` returns accepted input types, size limits, and supported languages.

The preview, payment page, and email communications can be presented in English, Spanish, German, French, Japanese, or Korean.

## Limitations and notes

The hosted server implementation is not included in the public repository, which documents the service and its registry entry. The repository files are MIT-licensed, but that license does not apply to the hosted implementation.

Users should verify destination numbers independently before sending, especially for sensitive documents. The assistant may identify a number from an external source, but the material specifically recommends checking an IRS number against irs.gov before faxing tax documents. Payment must happen in a browser for every fax, and a file already present in a chat app is not automatically transferred through MCP.

_Full upstream README: https://allmcps.com/mcp/payperfax/readme_