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PayPerFax MCP Server

by payperfax Your server? Claim it
answering

PayPerFax is answering right now. Last checked 5 min ago. It exposes 3 tools. Last commit 18 Oct 2026.

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

Uptime history 21 days of history · worst day 99%
21 days agonow
100.0%
Uptime 24h
92 of 92 checks
3
Tools
read from the server
638 ms
Response time
average over 24h
0
Stars
last commit 18 Oct 2026

What changed 3

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 14 October 2026. No other catalogue keeps this.

22 Oct a tool changed the parameters it asks for create_fax
18 Oct a tool description was rewritten get_fax_status
13 Oct a tool changed the parameters it asks for create_fax

PayPerFax missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

run in your terminal
claude mcp add fax --transport http https://fax.payperfax.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://fax.payperfax.com/mcp
~/.codex/config.toml
[mcp_servers.fax]
url = "https://fax.payperfax.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "fax": {
      "url": "https://fax.payperfax.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "fax": {
      "type": "http",
      "url": "https://fax.payperfax.com/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

fax
create_fax
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 protected]" -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.
get_fax_status
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.
supported
list_supported_formats
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.

Endpoints

URLTransportStateLatencyChecked
https://fax.payperfax.com/mcp streamable-http answering 664 ms 5 min ago

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PayPerFax — questions

Answers built from our own checks of this server.

What can PayPerFax do?
It exposes 3 tools, read directly from the server on our last check. Among them: create_fax, get_fax_status, list_supported_formats. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is PayPerFax working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 638 ms. The bar chart above shows every period we have measured.
How do I connect PayPerFax?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does PayPerFax need an API key?
No. PayPerFax completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is PayPerFax?
It answers our handshake in 638 ms on average, which is faster than 18% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is PayPerFax open source?
The code is open source: it is published under the MIT licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at fax.payperfax.com, which runs on its operator's own terms.