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PayPerFax

R0· no sign-in

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

v1.0.3 · active · repository · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality86good
Trust100of 100
Uptime, 30 days97%
Latency p50443 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "fax": {
      "type": "http",
      "url": "https://fax.payperfax.com/mcp"
    }
  }
}
claude mcp add --transport http fax https://fax.payperfax.com/mcp
[mcp_servers.fax]
url = "https://fax.payperfax.com/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "fax": {
      "type": "remote",
      "url": "https://fax.payperfax.com/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "fax": {
      "type": "http",
      "url": "https://fax.payperfax.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=fax&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZmF4LnBheXBlcmZheC5jb20vbWNwIn0%3D"
}
{
  "servers": {
    "fax": {
      "type": "http",
      "url": "https://fax.payperfax.com/mcp"
    }
  }
}
{
  "mcpServers": {
    "fax": {
      "httpUrl": "https://fax.payperfax.com/mcp"
    }
  }
}
extensions:
  "fax":
    enabled: true
    name: "fax"
    type: streamable_http
    uri: "https://fax.payperfax.com/mcp"
    timeout: 300

Quality 86 / 100good

protocol88 · weight 25
  • pass
    protocol.modernsupports 2026-07-28 (server/discover)
  • pass
    protocol.statelessanswers without a session
  • pass
    protocol.transportstreamable HTTP
  • warn
    protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene79 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • warn
    tools.description_length1 tools have descriptions over 1,024 characters, which crowds the context
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations3 of 3 tools declare readOnlyHint or destructiveHint
  • fail
    tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: get_fax_status (destructiveHint, idempotentHint, openWorldHint); create_fax (idempotentHint, openWorldHint); list_supported_formats (destructiveHint, idempotentHint, openWorldHint)
  • pass
    tools.token_costabout 1,351 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changes5 tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

3 tools, about 1,351 tokens to load them all · tool set 42a07eb1625f · tools last changed 2026-10-18 · checked 2026-10-20 10:35 UTC

Tool changes

  • get_fax_statuschangeddescription
    before

    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. Do not call this in a loop: read the status when the person asks.

    after · 94% of words in common

    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.

  • create_faxchangedinput schema
  • list_supported_formatschangedannotations
  • get_fax_statuschangedannotations
  • create_faxchangedannotations

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 100 / 100

provenance100
liveness99
freshness100
hygiene100

+repository +namespace-matches-repo +dns-namespace +website +reachable +uptime-97% +updated-2d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://fax.payperfax.com/mcp streamable-httpnoneyes97%443 ms2026-07-282026-10-20

Tools (3)

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. 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_statusread-onlyRead 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.
list_supported_formatsread-onlyList 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.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "com.payperfax/fax",
  "title": "PayPerFax",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://fax.payperfax.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.3",
  "repository": {
    "url": "https://github.com/payperfax/fax-mcp",
    "source": "github"
  },
  "websiteUrl": "https://payperfax.com/fax-mcp/",
  "description": "Your AI assistant prepares the fax. You check it and pay in your browser. Pay per fax. No account."
}