# SendThisFax (remote · www.sendthisfax.com)

Send real faxes to EU institutions: pay per fax via checkout link or prepaid API key.

- Trust score: 65/100 (medium)
- Change this week: +2
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `www.sendthisfax.com`: 65/100 (this document), [markdown](https://verifymcp.io/servers/com-sendthisfax-fax/www.md), [page](https://verifymcp.io/servers/com-sendthisfax-fax/www)

## Channel facts

- Endpoint: `https://www.sendthisfax.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 66/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 835 tokens (~208/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http com-sendthisfax-fax https://www.sendthisfax.com/mcp
```

### Codex

```toml
[mcp_servers.com-sendthisfax-fax]
url = "https://www.sendthisfax.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-sendthisfax-fax": {
      "type": "remote",
      "url": "https://www.sendthisfax.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-sendthisfax-fax --url https://www.sendthisfax.com/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-sendthisfax-fax:
    url: "https://www.sendthisfax.com/mcp"
```

### Other

```json
{
  "mcpServers": {
    "com-sendthisfax-fax": {
      "type": "http",
      "url": "https://www.sendthisfax.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-02 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 64, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 63, −1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-28 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 63, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 62)

First indexed and scored.

## MCP tools (4)

### `get_price` (~106 tokens)

Get fax price quote

Get the price quote in euro cents for sending a fax. Pricing: 5.00 EUR for up to 5 pages, plus 0.50 EUR per extra page, plus VAT based on the payer's billing country (0% VAT outside the EU).

Input parameters:

- `billing_country` (string, required): ISO 3166-1 alpha-2 country code of the payer (e.g. DE, FR, NL)
- `page_count` (integer, required): Number of pages in the PDF

### `send_fax` (~436 tokens)

Send a fax

Submit an uploaded PDF for faxing.

Step 1 (before this tool): upload the PDF over plain HTTP multipart, using any HTTP client you have — shell, JavaScript fetch with FormData, Python, etc.:
  curl -F "file=@document.pdf" https://www.sendthisfax.com/api/upload
  fetch("https://www.sendthisfax.com/api/upload", {method: "POST", body: formDataWithFile})
The response contains fax_public_id and page_count. PDFs must be unencrypted, at most 50 MB and 1000 pages.

Step 2: call this tool with the fax_public_id and the recipient fax number.

Two modes:
\- With an API key (Authorization: Bearer stf_live_... on this MCP connection): the fax price is debited from the prepaid credit balance and sending starts immediately — no checkout, no browser. sender_email and billing_country are optional (they default to the key's records). Buy credits at https://www.sendthisfax.com/en/credits.
\- Without an API key: sender_email and billing_country are REQUIRED and the tool returns a checkout_url the USER must pay in a browser; the fax is sent automatically once paid.

In both modes, poll get_fax_status until status reaches "delivered" or "failed" (failures after payment are auto-refunded).

For integration testing, +19898989898 is the designated test recipient number.

Input parameters:

- `billing_country` (string): ISO 3166-1 alpha-2 country of the payer, determines VAT. Required without an API key; fixed by the key's first purchase otherwise.
- `fax_public_id` (string, required): The fax public id (fax_...) from the upload step
- `locale` (string): Language for emails and the checkout page (default: en)
- `recipient_number` (string, required): Recipient fax number in E.164 format, e.g. +49301234567
- `sender_email` (string): Payer email for the receipt and delivery notification. Required without an API key; defaults to the key's email otherwise.

### `get_fax_status` (~108 tokens)

Get fax status

Get the current status of a fax. Poll this after send_fax until a terminal state.

Fax lifecycle: draft (uploaded, not submitted) -> pending (submitted, awaiting payment) -> sending -> delivered | failed.
Payment lifecycle: unpaid -> verifying/open (checkout in progress) -> paid | failed | canceled | expired.
A fax that fails after payment is refunded automatically to the payer.

Input parameters:

- `fax_id` (string, required): The fax public id (fax_...) returned by the upload

### `check_balance` (~65 tokens)

Check credit balance

Get the prepaid credit balance of the API key used to authenticate this MCP connection. Requires a bearer API key (stf_live_...). Buy or top up credits at https://www.sendthisfax.com/en/credits — credits never expire and failed faxes are re-credited automatically.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-sendthisfax-fax/www#diagnostics

## Score history

- 2026-08-03: 65
- 2026-08-02: 65
- 2026-08-01: 64
- 2026-07-31: 64
- 2026-07-30: 63
- 2026-07-29: 64
- 2026-07-28: 64
- 2026-07-27: 63
- 2026-07-26: 62

## Links

- Remote endpoint: https://www.sendthisfax.com/mcp
- Website: https://www.sendthisfax.com/en/mcp
- Changelog RSS feed: https://verifymcp.io/servers/com-sendthisfax-fax/www/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-sendthisfax-fax/www/changelog.json
- HTML version of this page: https://verifymcp.io/servers/com-sendthisfax-fax/www