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.
Available components
Last scanned (5 hours ago)
Scores higher than 54% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Documents and Files
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. How we score → Why this is hard to score →
Endpoint Security74
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability65
- AI-judged instruction clarity (excellent).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management3
- Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities73
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
- Supports UI / widget rendering.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 +1
- Stability: unverified → 0.03 ▲ functional
- 4 Nov 26 68
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://mcp.prontofax.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=prontofax.com | CN=Amazon RSA 2048 M04,O=Amazon,C=US | 13 Jul 2026 | 26 Jan 2027 | RSA 2048 | SHA256-RSA | 4b3f6276a16ef6e657f068becbe1869 |
| SANs: prontofax.com, www.prontofax.com, *.prontofax.com | ||||||
| CN=Amazon RSA 2048 M04,O=Amazon,C=US (CA) | CN=Amazon Root CA 1,O=Amazon,C=US | 23 Aug 2022 | 23 Aug 2030 | RSA 2048 | SHA256-RSA | 773124f2a952e3ed18a58bdb85d1bc0ce5f27 |
| CN=Amazon Root CA 1,O=Amazon,C=US (CA) | CN=Starfield Services Root Certificate Authority - G2,O=Starfield Technologies\, Inc.,L=Scottsdale,ST=Arizona,C=US | 25 May 2015 | 31 Dec 2037 | RSA 2048 | SHA256-RSA | 67f944a2a27cdf3fac2ae2b01f908eeb9c4c6 |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.prontofax.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| prontofax.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.prontofax.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.prontofax.com/mcp | HTTPS enforced |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
lookup_fax_number ProntoFax: look up a verified fax number ~286
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.
| Name | Type | Req | Description |
|---|---|---|---|
| agency | string | yes | 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. |
No output schema declared.
No examples provided.
send_fax ProntoFax: send a fax ~216
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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. |
No output schema declared.
No examples provided.
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.
remote · mcp.prontofax.com
claude mcp add --transport http com-prontofax-prontofax 'https://mcp.prontofax.com/mcp'
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.