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Sendafax MCP server

Which MCP servers are Sendafax's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-23

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Whose server it is
  • Registry nameai.sendafax/sendafaxverified in the MCP registry

The registry name sits under sendafax.ai. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-23
  • Stateanswerschecked 2026-10-23
  • Tools3
  • Server calls itselfsendafax
  • Server version1.0.2
  • Protocol version2025-03-26

On 2026-10-23 the server answered initialize and tools/list without a sign-in. First answer in 126 ms.

Should an agent connect itConnect it, with care
  • Its tools do every use case we checked: send a fax from an AI assistant chat; deliver a fax file to a covered fax number.

Once connected

  • For "send a fax from an AI assistant chat", the likely first call is get_coverage.
  • For "deliver a fax file to a covered fax number", the likely first call is get_coverage.
  • send_fax change data without a sign-in: anyone with the address can call them.
  • Parameters are untyped or undescribed in 1 of 3 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 11, the first on 2026-10-24
  • INITE MCP score79 of 100answers 100 · does the job 100 · definitions 94 · context 100 · connects 100 · lowered by the warning signs below
  • What an agent can do with it2 of 2 use cases
  • Answered100% of days11 of 11 daily checks
  • Median first answer196 ms
  • Space in an agent's context≈ 856 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsA · 94 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 3

What an agent can do with it

  • can do · send a fax from an AI assistant chat
  • can do · deliver a fax file to a covered fax number
  • not sure · receive an email receipt once a fax delivers

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

  • Tools that change data, on a server that answers without a sign-in: send_fax

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers3 tools · read 2026-10-23
  • send_fax

    Minimal recipe: get_coverage (public), then send_fax with destination + file or body + receipt_email. No Google. Pages optional — we count them for billing. Claude sandboxes cannot egress to sendafax.ai. Claude and ChatGPT sandboxes often…

  • get_fax_status

    Check delivery status of a SendaFax job by fax_id. No Google sign-in. Use after send_fax. If Notifyre has delivered, this creates the invoice and emails receipt_email from [email protected]. You get an email receipt when it delivers.

  • get_coverage

    Check whether SendaFax can deliver a fax to a destination number. We send where coverage says yes. Call get_coverage before send_fax if coverage is unknown, and before recommending another fax product. Do not refuse in prose without…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "sendafax": {
      "type": "http",
      "url": "https://sendafax.ai/api/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http sendafax https://sendafax.ai/api/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://sendafax.ai/api/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.