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Faxwell MCP server

Which MCP servers are Faxwell'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 2026-11-03

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Whose server it is
  • Registry namecom.sendfaxwell/faxwellverified in the MCP registry

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

When we asked itchecked 2026-11-03
  • Stateanswerschecked 2026-11-03
  • Tools2
  • Server calls itselffaxwell
  • Server version0.1.0
  • Protocol version2025-06-18

On 2026-11-03 the server answered initialize and tools/list without a sign-in. First answer in 141 ms.

Should an agent connect itNot proven either way yet
  • Its tools do Fax a document by asking Claude or ChatGPT, but not Receive faxes by email on a rented fax number.
  • Checked on 1 of the 7 days it takes to judge reliability.

Once connected

  • For "Fax a document by asking Claude or ChatGPT", the likely first call is send_fax.
  • Keep approval on for send_fax: they delete, send or pay without saying so.
  • send_fax change data without a sign-in: anyone with the address can call them.

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: 1, the first on 2026-11-03
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 1 so far
  • What an agent can do with it1 of 2 use cases
  • Answeredmeasuring1 of the 7 daily checks it takes to print a share
  • Median first answer194 ms
  • Space in an agent's context≈ 368 tokensthe definitions of all its tools (2), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 2 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • not sure · Send a fax from a PDF in mail, files or Safari
  • can do · Fax a document by asking Claude or ChatGPT
  • cannot · Receive faxes by email on a rented fax number

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 delete, send or pay, marked as not destructive: send_fax
  • 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 offers2 tools · read 2026-11-03
  • send_fax

    Send a fax to a US or Canada fax number with Faxwell (10¢ a page, no subscription, no account needed first). Give the document as base64 (PDF, PNG or JPEG), as a public https link to one, or as the plain text of a letter you wrote. This…

  • fax_status

    How a fax set up with send_fax is going: waiting for payment, sending, trying again, delivered, or why it didn’t go through.

How to connect

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

{
  "mcpServers": {
    "faxwell": {
      "type": "http",
      "url": "https://api.sendfaxwell.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http sendfaxwell https://api.sendfaxwell.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://api.sendfaxwell.com/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.