Connect

8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "fax": {
      "type": "http",
      "url": "https://www.sendthisfax.com/mcp",
      "headers": {
        "Authorization": "Bearer ${FAX_TOKEN}"
      }
    }
  }
}

claude mcp add --transport http fax https://www.sendthisfax.com/mcp --header "Authorization: Bearer ${FAX_TOKEN}"

[mcp_servers.fax]
url = "https://www.sendthisfax.com/mcp"
bearer_token_env_var = "FAX_TOKEN"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "fax": {
      "type": "remote",
      "url": "https://www.sendthisfax.com/mcp",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:FAX_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "fax": {
      "type": "http",
      "url": "https://www.sendthisfax.com/mcp",
      "headers": {
        "Authorization": "Bearer ${FAX_TOKEN}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=fax&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vd3d3LnNlbmR0aGlzZmF4LmNvbS9tY3AiLCJoZWFkZXJzIjp7IkF1dGhvcml6YXRpb24iOiJCZWFyZXIgJHtGQVhfVE9LRU59In19"
}

{
  "servers": {
    "fax": {
      "type": "http",
      "url": "https://www.sendthisfax.com/mcp",
      "headers": {
        "Authorization": "Bearer ${FAX_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "fax": {
      "httpUrl": "https://www.sendthisfax.com/mcp",
      "headers": {
        "Authorization": "Bearer ${FAX_TOKEN}"
      }
    }
  }
}

extensions:
  "fax":
    enabled: true
    name: "fax"
    type: streamable_http
    uri: "https://www.sendthisfax.com/mcp"
    headers:
      "Authorization": "Bearer ${FAX_TOKEN}"
    timeout: 300

Placeholders to fill from your own secret store: ${FAX_TOKEN}. The registry never accepts secret values.

Quality 85 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene86 · weight 30

pass
tools.descriptionsevery tool has a description
warn
tools.description_length1 tools have descriptions over 1,024 characters, which crowds the context
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations4 of 4 tools declare readOnlyHint or destructiveHint
warn
tools.directory_hints1 of 4 tools declare all four hints; missing: get_price (destructiveHint, idempotentHint); get_fax_status (destructiveHint, idempotentHint); check_balance (destructiveHint, idempotentHint)
pass
tools.token_costabout 967 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

4 tools, about 967 tokens to load them all · tool set 920ae6f54b74 · checked 2026-10-20 14:21 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 75 / 100

no-repository

provenance55

liveness99

freshness65

hygiene80

+dns-namespace +website +reachable +uptime-97% ~updated-104d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://www.sendthisfax.com/mcp` streamable-http	none	yes	97%	639 ms	2025-06-18	2026-10-20

Tools (4)

`check_balance`read-only	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.
`get_fax_status`read-only	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.
`get_price`read-only	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).
`send_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 "[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.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "com.sendthisfax/fax",
  "title": "SendThisFax",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://www.sendthisfax.com/mcp",
      "type": "streamable-http",
      "headers": [
        {
          "name": "Authorization",
          "isSecret": true,
          "description": "Optional: Bearer stf_live_... prepaid API key for autonomous sending (buy at https://www.sendthisfax.com/en/credits). Omit for pay-per-fax checkout links."
        }
      ]
    }
  ],
  "version": "1.0.0",
  "websiteUrl": "https://www.sendthisfax.com/en/mcp",
  "description": "Send real faxes to EU institutions: pay per fax via checkout link or prepaid API key."
}