# com.prontofax/prontofax (remote · mcp.prontofax.com)

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

- Trust score: 69/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `mcp.prontofax.com`: 69/100 (this document), [markdown](https://verifymcp.io/servers/com-prontofax-prontofax/mcp.md), [page](https://verifymcp.io/servers/com-prontofax-prontofax/mcp)

## Channel facts

- Endpoint: `https://mcp.prontofax.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 65/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 743 tokens (~371/item across 2 items; 2 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 3/100
  - Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 73/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.
  - Supports UI / widget rendering.

## Install

### How do I install the com.prontofax/prontofax MCP server?

com.prontofax/prontofax is a hosted endpoint at https://mcp.prontofax.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-prontofax-prontofax 'https://mcp.prontofax.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-prontofax-prontofax": {
      "url": "https://mcp.prontofax.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-prontofax-prontofax": {
      "type": "http",
      "url": "https://mcp.prontofax.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-prontofax-prontofax]
url = "https://mcp.prontofax.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-prontofax-prontofax": {
      "type": "remote",
      "url": "https://mcp.prontofax.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-prontofax-prontofax --url 'https://mcp.prontofax.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-prontofax-prontofax:
    url: "https://mcp.prontofax.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-prontofax-prontofax": {
      "Transport": "http",
      "Url": "https://mcp.prontofax.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-prontofax-prontofax -t streamable-http -u 'https://mcp.prontofax.com/mcp'
```

### Other

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

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 69, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-11-04 (score 68)

First indexed and scored.

## MCP tools (2)

### `lookup_fax_number` (~286 tokens)

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.

Input parameters:

- `agency` (string, required): The agency to look up, in the user's own words, for example "MassHealth", "Texas Workforce Commission" or "social security office in Denver".
- `city` (string): City or town, used to pick a Social Security field office. Optional.
- `language` (string): Language for the response. Defaults to English.
- `state` (string): Two-letter US state code, for example TX. Optional, and the only place a bare code is read.

### `send_fax` (~216 tokens)

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.

Input parameters:

- `agency` (string): The agency the fax is going to, if known. Used for reporting only.
- `fax_number` (string): The destination US fax number, in any format, including as printed on a letter or form the user attached.
- `language` (string): Language for the response. Defaults to English.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-prontofax-prontofax/mcp#diagnostics

## Score history

- 2026-11-05: 69
- 2026-11-04: 68

## Common questions

### What is the com.prontofax/prontofax MCP server?

com.prontofax/prontofax is an MCP server listed in the public MCP registry as com.prontofax/prontofax. Verified US government fax numbers and send a fax from the chat. No account, $2.99 on delivery. This page covers its hosted endpoint (https://mcp.prontofax.com/mcp).

### Is the com.prontofax/prontofax MCP server safe to use?

com.prontofax/prontofax scores 69 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the com.prontofax/prontofax MCP server expose?

com.prontofax/prontofax exposes 2 tools: lookup_fax_number, send_fax. Their descriptions and schemas cost roughly 502 tokens of context every time the server is loaded.

### Does the com.prontofax/prontofax MCP server require authentication?

No. We connected to com.prontofax/prontofax without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the com.prontofax/prontofax MCP server still maintained?

com.prontofax/prontofax is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://mcp.prontofax.com/mcp
- Website: https://www.prontofax.com/mcp/
- Changelog RSS feed: https://verifymcp.io/servers/com-prontofax-prontofax/mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-prontofax-prontofax/mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-prontofax-prontofax/mcp