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Faxwell

com.sendfaxwell/faxwellsendfaxwell.comstreamable-httpv1.0.0Scanned

Send a fax to any US or Canada number. 10¢ a page, no subscription, no account needed first.

2 tools: 1 do something that can't be undone and 1 change things.

Tools: 0 delete, 1 irreversible, 1 write, 0 read.
  • Reads private data · 0
  • Reads text others write · 1
  • Can send data out · 1
  • 1 finding

Anlyon alternative

2 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →
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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

2 tools

Can't be undone 1Claude Code: ask
  • send_faxSend a fax to a US or Canada fax number with Faxwell (10¢ a page, no subscription, no account needed first).Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "send_fax" says "send": a word for sending, and what is sent cannot be taken back.
    • The input addresses people (input.to): what it sends cannot be taken back.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • outboundThe name "send_fax" says "send": it sends or publishes something to other people.
    • outboundThe input takes a destination (input.to): what the tool writes goes there.
    Description, as the server wrote it
    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 prepares the fax and returns a link for the user: they check it and pay (Apple Pay, Google Pay or card) or use page credits they already have, and it sends automatically. Nothing is sent or charged before that. If you can’t pass the file, call this with just the number: the user can add the document at the link.

    Annotations the server declares

    • title: Send a fax
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
Changes things 1Claude Code: ask
  • fax_statusHow a fax set up with send_fax is going: waiting for payment, sending, trying again, delivered, or why it didn’t go through.1 finding

    Why it is in this group

    • The name "fax_status" says "status": a word for reading.
    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "fax_status" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "fax_status" says "status": a word for reading.

      What this check looks for
    Description, as the server wrote it
    How a fax set up with send_fax is going: waiting for payment, sending, trying again, delivered, or why it didn’t go through.

    Annotations the server declares

    • title: Check a fax
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write1
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out1
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnfax_status

    The server marks "fax_status" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "fax_status" says "status": a word for reading.

    What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

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

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__faxwell__send_fax",
      "mcp__faxwell__fax_status"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as faxwell. Review it before you use it.

Capability tags behind 1 rule
  • mcp__faxwell__send_fax untrusted-input, outbound

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/com.sendfaxwell/faxwell/verify?hash=fc4942e95419780de2ec04b87376e3ad11a34bb225358f036a97fcd6a6323d2d" | jq -e '.changed == false'

Pinned hash fc4942e95419, from Nov 3, 2026, 12:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.sendfaxwell/faxwell/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

anlyon.dev badge for com.sendfaxwell/faxwell
[![anlyon.dev](https://anlyon.dev/badge/com.sendfaxwell/faxwell.svg)](https://anlyon.dev/servers/com.sendfaxwell/faxwell)

Source: MCP Registry. Synced Nov 3, 2026, 12:17 UTC.