Prontofax

com.prontofaxPublished by prontofax.comOfficial publisherv1.0.0Updated Nov 4, 2026

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

VerifiedStreamable HTTPWeb executableProductivity & WorkflowBusiness & Commerce

Overview

AI-generated overview

ProntoFax lets an assistant look up verified US government fax numbers and start a paid fax from the chat, with no account required.

What you can do
  • Look up verified fax numbers for US state and federal agencies, including Social Security field offices, MassHealth, California EDD, Illinois IDES, NJ FamilyCare and IRS Form 2553, returning the official source and last verification date.
  • Start a fax to a US number through an in-chat form where the user adds pages from a phone camera or PDF, adds an optional cover page and pays.
  • Fall back to a browser link for the same fax flow on hosts that cannot display the form.
When to use it
Useful when someone needs to fax a US government office and wants a number checked against an official source instead of guessing, or wants to send a short fax from a phone without creating an account.
Requirements
A remote MCP endpoint over streamable HTTP; no account, API key, environment variable or header is declared. Sending a fax requires payment in the in-chat form, and the user must add the document inside that form rather than attaching it to the chat.
Before you install
Sending a fax costs $2.99 flat for up to 25 pages, charged only when delivery is confirmed; nothing is sent or charged until payment is complete. A fax to a wrong number cannot be recalled, so verify the destination. Files attached to the chat cannot be passed to the send tool, and the fax content and payment go through the Prontofax service.

Installation

In SourceWeft

  1. Open Prontofax in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.prontofax%2Fprontofax/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "prontofax": {
      "type": "http",
      "url": "https://mcp.prontofax.com/mcp"
    }
  }
}

Tools

2

lookup_fax_number

ProntoFax: look up a verified fax number

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.

Parameterscitystateagencyrequiredlanguage

send_fax

ProntoFax: send a fax

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.

Parametersagencylanguagefax_number

Version history

1
  1. v1.0.0LatestNov 4, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.