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FaxOnline

by abrudtkuhl · remote · no sign-in to list tools · v1.0.0 · published by GitHub user abrudtkuhl

Prepare and track US PDF faxes with user-approved checkout. No account or subscription.

Changes · 1
CompareRegistry entry

2 tools: 1 change things and 1 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 faxonline https://faxonline.app/mcp/fax

Tools

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

2 tools

Changes things 1Claude Code: ask
  • prepare_faxPrepare one PDF fax and return its price and Stripe checkout link.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Prepare one PDF fax and return its price and Stripe checkout link. This stores the document but does not send or charge. Completing checkout authorizes sending to the displayed recipient. fax_number must be a US fax number: 10 digits (5155551234), optionally prefixed with 1 or +1 (E.164 such as +15155551234); common formatting such as (515) 555-1234 is accepted. Keep draft_token private and reuse it with identical inputs for retries.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
Only reads 1Claude Code: allow
  • get_fax_statusCheck your prepared fax using its secret draft_token.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
    Check your prepared fax using its secret draft_token. Returns payment and delivery status. A processing fax has not yet been delivered. Poll no more than once every 15 seconds.

    Annotations the server declares

    • readOnlyHint: true

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

claude mcp add --transport http faxonline https://faxonline.app/mcp/fax

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__faxonline__get_fax_status"
    ],
    "ask": [
      "mcp__faxonline__prepare_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 faxonline. Review it before you use it.