XipFax
REMOTE · MCP.XIPFAX.COM
Fax a form from your AI assistant. XipFax finds the right IRS fax number and shows the price first.
Available components
Last scanned (1 day ago)
Scores higher than 58% of remote servers
Reachable. Last reached 4 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 Security80
- 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
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- 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 Usability75
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 406 tokens (~135/item across 3 items; 3 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 Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
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
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "send_fax_link" implies "send" and declares readOnlyHint instead, contradicting what its own name says it does. See how to fix → Fail
- An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Unverified: 1 category
A category scored 0 because we could not verify it: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
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.
- 4 Nov 26 72
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 4 Nov 2026 · Probed https://mcp.xipfax.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=xipfax.com | CN=Amazon RSA 2048 S21,O=Amazon,C=US | 3 Nov 2026 | 21 May 2027 | RSA 2048 | SHA256-RSA | 415c5bb9589f9090ea993c20f5044d25 |
| SANs: xipfax.com, mcp.xipfax.com, backend.xipfax.com, www.xipfax.com, app.xipfax.com | ||||||
| CN=Amazon RSA 2048 S21,O=Amazon,C=US (CA) | CN=Amazon Root CA 1,O=Amazon,C=US | 8 Jul 2026 | 7 Jul 2029 | RSA 2048 | SHA256-RSA | 12619a08964ad9c07eee9280fc66f5729f694b41 |
| 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.xipfax.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| xipfax.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 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| content-security-policy | default-src 'none'; frame-ancestors 'none' |
| x-content-type-options | nosniff |
| referrer-policy | no-referrer |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.xipfax.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.xipfax.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 →
find_fax_number Find a fax number ~169
Finds the fax number of the IRS office that takes a form or a notice, from XipFax’s list of offices, read from the IRS’s own pages. Give the form or the notice by its name or number alone, such as Form 2848, SS-4 or CP2000. Where the IRS gives a number for each state, give the place too.
| Name | Type | Req | Description |
|---|---|---|---|
| form | string | yes | The form or notice by its name or number alone: Form 2848, SS-4, CP2000. |
| place | string | – | Where the person lives, or where the business is, by its postal code, such as OH for Ohio or PR for Puerto Rico; APO-FPO for an APO or FPO address; ABROAD for anywhere outside the United States. |
| Name | Type | Req | Description |
|---|---|---|---|
| choices | array | – | choose: the offices to choose among, each saying for whom or what. |
| instead | array | – | found: offices for what may apply instead, wherever one lives, each saying for whom. |
| note | string | – | Why no one office answers, and where to find the number. |
| office | object | – | found: the office the fax goes to. |
| question | string | – | choose: what to ask to choose the office, such as where one lives. |
| result | string | yes | found: the office is known. choose: ask the question, then call again or pick a choice. none: no office on the list. |
No examples provided.
quote_fax Quote a fax ~55
The price of sending one fax of a number of pages with XipFax, without a plan, from XipFax’s price list.
| Name | Type | Req | Description |
|---|---|---|---|
| pages | integer | yes | The pages to send, from 1 to 250. |
| Name | Type | Req | Description |
|---|---|---|---|
| pages | integer | yes | The pages quoted. |
| price | object | yes | What the fax costs. |
| price_list | string | yes | The version of XipFax’s price list the quote is from. |
| price_shown | string | yes | The price as XipFax prints it: $4.99. |
| terms | string | yes | How the price is made, as XipFax’s pages say it: the first pages, then each page. |
No examples provided.
send_fax_link Link to send a fax ~111
A link that opens XipFax’s send screen with the fax number filled in: an office by its office_id from find_fax_number, or a fax number in the United States, its territories or Canada. The person adds their pages there, signs in and pays.
| Name | Type | Req | Description |
|---|---|---|---|
| fax_number | string | – | A fax number, with or without its +1: +1 202 555 0143. |
| office_id | string | – | The office, as find_fax_number gives it. |
| Name | Type | Req | Description |
|---|---|---|---|
| to | string | yes | Where the fax goes, as the link fills it in: the office, or the number. |
| url | string | yes | The link to XipFax’s send screen, with the number filled in. |
No examples provided.
How do I install the XipFax MCP server?
XipFax is a hosted endpoint at https://mcp.xipfax.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.xipfax.com
claude mcp add --transport http com-xipfax-fax 'https://mcp.xipfax.com/mcp'
What is the XipFax MCP server?
XipFax is an MCP server listed in the public MCP registry as com.xipfax/fax. Fax a form from your AI assistant. XipFax finds the right IRS fax number and shows the price first. This page covers its hosted endpoint (https://mcp.xipfax.com/mcp).
Is the XipFax MCP server safe to use?
XipFax scores 72 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 XipFax MCP server expose?
XipFax exposes 3 tools: find_fax_number, quote_fax, send_fax_link. Their descriptions and schemas cost roughly 335 tokens of context every time the server is loaded.
Does the XipFax MCP server require authentication?
No. We connected to XipFax without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the XipFax MCP server still maintained?
XipFax is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.