What are reliable alternatives to SofortFax – Faxen mit KI (Login)?

Measured by Faceabot as working: PromptFax.

How do I connect an AI agent to SofortFax – Faxen mit KI (Login)?

Use the MCP streamable HTTP endpoint https://sofortfax.de/api/mcp-oauth.php.

Catalog › de.sofortfax/fax-oauth

Is SofortFax – Faxen mit KI (Login) reliable?

Private (key required) SofortFax – Faxen mit KI (Login) answers but requires credentials, so Faceabot cannot test it anonymously. It is not counted as failing.

Last check: 2026-10-19 00:45 UTC · answered in 5644 ms · remote (no install)

Proven alternatives that work right now

PromptFax Reliable (measured) · 100%
Send a one-off fax from inside ChatGPT or Claude. Pay-per-use, $2-$4.50 per delivered fax. · https://promptfax.app/mcp

Picked from Faceabot's live measurements. Or let Faceabot choose: GET https://faceabot.com/resolve?need=…

En français : Accès privé (clé requise). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

Fax from ChatGPT/Claude with OAuth sign-in: pay per fax or KI credits. DE/AT + 40 countries.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 1.0.0 · publisher website

Connect your agent

{
  "mcpServers": {
    "fax-oauth": {
      "url": "https://sofortfax.de/api/mcp-oauth.php"
    }
  }
}

Or ask Faceabot first: MCP tool check_reliability {"id":"de.sofortfax/fax-oauth"} on https://faceabot.com/api/mcp.

Does it actually do the job?

Not tested with a real task yet. Faceabot only runs real tasks on tools that declare themselves read-only (readOnlyHint), with a neutral sample input.

Faceabot measurements

When	Answers	Real task	Latency
2026-10-19 00:45 UTC	❌ auth_required		5644 ms
2026-10-09 09:05 UTC	❌ auth_required		4306 ms

Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

More from the same publisher

SofortFax – Faxen mit KI Flaky · 86% over 7 checks Does the job (tested) · 6/6

Send real faxes from AI chat (DE/AT + 40 countries). PDF, JPG, photo. Pay per fax via Stripe.

MCP endpoint : https://sofortfax.de/api/mcp.php · website · measurements and details

SofortFax (KI-Fax-Credits) Flaky · 86% over 7 checks Fails real tasks · 0/6

Send faxes from AI chat with prepaid credits (1 credit = 1 fax, up to 40 pages). DE/AT + 40 more.

MCP endpoint : https://sofortfax.de/api/mcp-credits.php · website · measurements and details

Publisher of SofortFax – Faxen mit KI (Login)?

Show your measured reliability on your README or website:

[![Measured by Faceabot](https://faceabot.com/badge/de.sofortfax/fax-oauth.svg)](https://faceabot.com/tools/de.sofortfax/fax-oauth)

Data in JSON: /api/catalog?id=de.sofortfax/fax-oauth · Stop probes: POST /api/reliability/opt-out

AI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt

Best tool by topic · Pulse: what is changing in agent commerce · Is your store ready for AI shopping agents? · State of MCP (weekly) · MCP server doctor · Reliability data · Faceabot app · Faceabot → AI assistants · What AI agents cannot find yet · Add Faceabot to your AI · Badge for tool publishers · Help · Privacy · Terms