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anlyon.devby Anlyon

com.prontofax/prontofax

com.prontofax/prontofaxprontofax.comstreamable-httpv1.0.0Scanned

Verified US government fax numbers and send a fax from the chat. No account, $2.99 on delivery.

2 tools: 1 do something that can't be undone and 1 only read.

Tools: 0 delete, 1 irreversible, 0 write, 1 read.
  • Reads private data · 0
  • Reads text others write · 1
  • Can send data out · 1
  • No findings

Tools listed without sign-in. Remote posture

Anlyon alternative

1 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_faxStart a fax to a US fax number.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.

    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.
    Description, as the server wrote it
    Start a fax to a US fax number. Opens a form in this chat where the user adds pages from their phone camera or a PDF, adds an optional cover page, and pays. The fax costs $2.99 flat for up to 25 pages and is charged only when delivery is confirmed. No account is needed. Nothing is sent or charged until the user confirms and pays in that form. A file attached to this chat cannot be passed to this tool, so the user adds the document inside the form, and a document already attached does not need to be uploaded to the chat again. On a host that cannot show the form, this returns a link that opens the same flow in a browser.

    Annotations the server declares

    • title: ProntoFax: send a fax
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
Only reads 1Show 1 read-only tool
  • lookup_fax_numberFind the fax number for a US state or federal agency, with the official source it was read from and when it was last verified.No findings

    Why it is in this group

    • The name "lookup_fax_number" says "lookup": a word for reading.
    Description, as the server wrote it
    Find the fax number for a US state or federal agency, with the official source it was read from and when it was last verified. Covers Social Security field offices across 56 states and territories (search by city or state), MassHealth, California EDD, Illinois IDES, NJ FamilyCare, IRS Form 2553, FEMA, the state unemployment agencies of Alabama, Colorado, Indiana, Iowa, Kentucky, Maryland, Missouri, New Jersey, New York, South Carolina, Texas, Wisconsin, and the state Medicaid agencies of Florida, Georgia, Idaho, Louisiana, Montana, Nebraska, New Mexico, Oregon, Texas, Utah, Washington. It has no numbers for any other agency. Social Security and Medicaid publish no national fax number, so a lookup for either needs a city or a state. Returns nothing rather than guessing when it has no verified number for an agency.

    Annotations the server declares

    • title: ProntoFax: look up a verified fax number
    • 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.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Nov 4, 2026, 02:19 UTC, unchanged since Nov 4, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable
yes
HTTP status of an anonymous initialize
200
tools/list served without credentials
yes
Tools that change things, listed without credentials
1
Protocol version
2025-06-18
WWW-Authenticate on 401
not observed
resource_metadata in WWW-Authenticate
not observed
RFC 9728 protected resource metadata
not observed
Authorization servers
not observed
Legacy HTTP+SSE transport
no
Dynamic client registration
not observed
Client ID metadata documents
not observed
  • HighThe whole server

    The endpoint served tools/list without credentials, and the list has 1 tool that changes things (1 irreversible). Whether a call also works without credentials was not tested: tools are never called.

    Matched text

    https://mcp.prontofax.com/mcp: tools/list returned 2 tools to an anonymous client, including send_fax (irreversible)

    What this check looks for

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

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 prontofax https://mcp.prontofax.com/mcp
claude mcp add --transport http prontofax https://mcp.prontofax.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": [
      "mcp__prontofax__lookup_fax_number"
    ],
    "ask": [
      "mcp__prontofax__send_fax"
    ],
    "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 prontofax. Review it before you use it.

Capability tags behind 1 rule
  • mcp__prontofax__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.prontofax/prontofax/verify?hash=4f0e34a1ff97c9dc8e11562c5410fd409976f3fd65b73225b47b52d5adc05d15" | jq -e '.changed == false'

Pinned hash 4f0e34a1ff97, from Nov 4, 2026, 00:18 UTC.

Watch

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

https://anlyon.dev/servers/com.prontofax/prontofax/changes.xml

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

Badge

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

Source: MCP Registry. Synced Nov 4, 2026, 01:17 UTC.