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PayPerFax

by payperfax.com · remote · no sign-in to list tools · v1.0.3 · published by com.payperfax

Your AI assistant prepares the fax. You check it and pay in your browser. Pay per fax. No account.

Final · 1
CompareRegistry entry

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

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http fax https://fax.payperfax.com/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Can't be undone 1Claude Code: ask
  • create_faxPrepare a fax for a person to send with PayPerFax, the pay-per-fax service: no account, no subscription, one payment for one fax.No findings

    Why it is in this group

    • The name "create_fax" says "create": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.
    Description, as the server wrote it
    Prepare a fax for a person to send with PayPerFax, the pay-per-fax service: no account, no subscription, one payment for one fax. A common use is a letter or a form for the IRS, a doctor, a court, an insurer or a landlord. The tool does not send the fax and does not charge. It returns a link for the person. The person opens the link, sees the preview and the price, and pays in the browser. Then the fax is sent. Rules: 1. Email: ask the person for their email address. Do not guess it. The confirmation and the receipt go there. 2. A document that the person has as a file (a PDF, a scan, a signed form): do not retype it as text. A typed copy of a signed form is not the form. Set file_expected to true, and tell the person that they add the file on the page of the link. 3. The fax number of an agency or a company: take it from its official website (for the IRS: irs.gov), and show the person the source. A number from memory can send private papers to a stranger. 4. A letter that you write goes in markdown. With no cover page, the letter must have its own date, names and address block. With a cover page, keep cover_message short: a long message is cut off. 5. Limits: the markdown text can be at most 100 KB. Headings, lists, bold text and tables are printed. An image is printed as its alt text, a link as its text, and raw HTML as text. 6. If you can run shell commands and the document is a local file, send it with the HTTP call: curl -F "to=+14155550101" -F "email=person@example.com" -F "documents[]=@/path/to/file.pdf" https://fax.payperfax.com/api/fax 7. After the call, give the person the link, and say that nothing is sent and nothing is charged before they pay. The confirmation email comes after the payment. If the status of the fax is later "failed", the person is not charged, and can send the fax again.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: false
    • title: Create a fax
Only reads 2Claude Code: allow
  • get_fax_statusRead where a fax is.No findings

    Why it is in this group

    • The name "get_fax_status" says "get": a word for reading.
    Description, as the server wrote it
    Read where a fax is. Give the id from create_fax, or an address of the fax: the status address from the tracking prompt of the person, or the address of a page of the fax. "status" is pending, delivered, failed or expired. While it is pending, "stage" says more: rendering (we prepare the pages), awaiting_payment (the person did not pay yet; "pages" and "price" are given, and they can still change), sending (paid, on its way). delivered: the fax arrived. failed: the fax was not delivered, the person is not charged, and can send it again; with "render_failed", the document could not be prepared, and the person opens the link to change it. expired: the fax was not paid in time, or its data was deleted after 30 days. Do not call this in a loop: read the status when the person asks.

    Annotations the server declares

    • readOnlyHint: true
    • title: Get the status of a fax
  • list_supported_formatsList what PayPerFax can fax, and the limits: the text that create_fax takes, the file types that a person can add on the form or that a shell can send to the HTTP call, the sizes, …No findings

    Why it is in this group

    • The name "list_supported_formats" says "list": a word for reading.
    Description, as the server wrote it
    List what PayPerFax can fax, and the limits: the text that create_fax takes, the file types that a person can add on the form or that a shell can send to the HTTP call, the sizes, and the languages.

    Annotations the server declares

    • readOnlyHint: true
    • title: List the supported formats

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.

Install

Pinned to version 1.0.3. Values in angle brackets are yours to fill in.

claude mcp add --transport http fax https://fax.payperfax.com/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__fax__get_fax_status",
      "mcp__fax__list_supported_formats"
    ],
    "ask": [
      "mcp__fax__create_fax"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as fax. Review it before you use it.