SendThisFax

endpoint

https://www.sendthisfax.com/mcp

protocol

streamable-http ·2025-06-18

authentication

none observed

public key

none — nobody has proven they own this listing · is it yours? claim it

karma

0 · newcomer

Is SendThisFax live?

Yes — it answered the hub's last check (checked 8m ago). It answered 100% of checks over the last 30 days.

Is SendThisFax free to use?

Not anonymously — it asks for a key or a login before it will serve. Whether that key costs anything is the operator's plan to say: the hub measured the door, not the pricing.

What tools does SendThisFax have?

4 tools: get_price, get_fax_status, send_fax, check_balance.

Is SendThisFax safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

• check_balance reads auth-required 14h ago

  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.

  mcp-tool

  1234

  {
    "type": "object",
    "properties": {}
  }

  arguments 4 lines copy
• get_price reads unknown 14h ago

  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).

  mcp-tool

  1234567891011121314151617181920

  {
    "type": "object",
    "required": [
      "page_count",
      "billing_country"
    ],
    "properties": {
      "page_count": {
        "type": "integer",
        "maximum": 1000,
        "minimum": 1,
        "description": "Number of pages in the PDF"
      },
      "billing_country": {
        "type": "string",
        "pattern": "^[A-Za-z]{2}$",
        "description": "ISO 3166-1 alpha-2 country code of the payer (e.g. DE, FR, NL)"
      }
    }
  }

  arguments 20 lines copy
• get_fax_status reads unknown 14h ago

  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.

  mcp-tool

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  {
    "type": "object",
    "required": [
      "fax_id"
    ],
    "properties": {
      "fax_id": {
        "type": "string",
        "pattern": "^fax_",
        "description": "The fax public id (fax_...) returned by the upload"
      }
    }
  }

  arguments 13 lines copy
• send_fax sends messages unknown never probed

  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 "[email protected]" 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.

  mcp-tool

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  {
    "type": "object",
    "required": [
      "fax_public_id",
      "recipient_number"
    ],
    "properties": {
      "locale": {
        "enum": [
          "en",
          "de",
          "fr",
          "nl",
          "es",
          "it"
        ],
        "type": "string",
        "description": "Language for emails and the checkout page (default: en)"
      },
      "sender_email": {
        "type": "string",
        "format": "email",
        "description": "Payer email for the receipt and delivery notification. Required without an API key; defaults to the key's email otherwise."
      },
      "fax_public_id": {
        "type": "string",
        "pattern": "^fax_",
        "description": "The fax public id (fax_...) from the upload step"
      },
      "billing_country": {
        "type": "string",
        "pattern": "^[A-Za-z]{2}$",
        "description": "ISO 3166-1 alpha-2 country of the payer, determines VAT. Required without an API key; fixed by the key's first purchase otherwise."
      },
      "recipient_number": {
        "type": "string",
        "pattern": "^\\+[1-9][0-9]{6,14}$",
        "description": "Recipient fax number in E.164 format, e.g. +49301234567"
      }
    }
  }

  arguments 41 lines copy

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.