PromptFax

connects

promptfax.app

Send a one-off fax from inside ChatGPT or Claude. Pay-per-use, $2-$4.50 per delivered fax.

https://promptfax.app/mcpOAuthMCP 2025-11-25v0.1.0last checked 24 Aug 2026spoke MCP on 2 of 2 checks (30 days)initialize in 538 ms

How to authenticate

Checked against the endpoint by our probe on 24 Aug 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	OAuth
Issuer	https://promptfax.app/
Dynamic client registration	✓Advertised (RFC 7591)
Client ID Metadata Document	✕Not advertised
PKCE	✓S256
Grant types	authorization_code, refresh_token
Scopes	mcp:tools, offline_access
Protected-resource metadata	✓Published (RFC 9728)
Anonymous access	Handshake succeeds; 8 tools listable
Documentation	https://promptfax.app/mcp-setup

What the probe found

8 tools usable without signing in

The server exposes a public surface before authorization: start_session, attach_document, get_quote, checkout, send_fax, get_status, retry_failed_fax, cancel.

Tools

attach_documentcancelcheckoutget_quoteget_statusretry_failed_faxsend_faxstart_session

Contract history

24 Aug 2026v0.1.0first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/promptfax/badge.svg)](https://mcpi.app/servers/promptfax)