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Faxbot

A multi-backend fax platform and MCP server providing T.38 fax transmission capabilities via Phaxio, SIP, and other providers with a GUI-focused administration console.

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Updated
Oct 8, 2025
Validated
Jan 11, 2026

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UI Demo

The first and only open‑source, self‑hostable fax platform with a GUI‑first Admin Console, multi‑backend adapters (cloud + self‑hosted), and AI assistant integration.

GUI‑first: Admin Console

  • One place to configure backends, keys, inbound, storage, and run diagnostics.
  • Open http://localhost:8080 and use the Admin Console (served by the API).
  • Traits‑first UI: screens render only what your active provider supports.

Why Faxbot

  • One API, many backends: Phaxio, Documo, Sinch, SignalWire, and more (cloud), or self‑hosted FreeSWTICH, SIP/Asterisk, or anything else you can dream up.
  • Ability to mix and match outbound and inbound providers, total freedom, fit to your infrastructure.
  • HIPAA‑aligned controls: HMAC webhook verification, short‑TTL tokens, compliant logging.
  • AI integration: official MCP servers (Node & Python) for stdio/HTTP/SSE with Webhook support.
  • Identical SDKs: Node.js and Python with the same surface.

Quick start (Docker Compose)

  1. Copy .env (see .env.example). Pick a backend:
  • Phaxio (recommended): set FAX_BACKEND=phaxio and PHAXIO_API_KEY/PHAXIO_API_SECRET.
  • Sinch: set FAX_BACKEND=sinch, SINCH_PROJECT_ID/SINCH_API_KEY/SINCH_API_SECRET.

Or one of 20 others that we have pre-made manifests for you to quickly load.

  • SIP/Asterisk: set FAX_BACKEND=sip and AMI vars (see docs).
  1. Start the API (and Admin Console):
docker compose up -d --build api
  1. Open the Admin Console: http://localhost:8080

Health checks:

  • API: curl http://localhost:8080/health
  • Ready: curl -i http://localhost:8080/health/ready

Optional MCP servers:

docker compose --profile mcp up -d --build faxbot-mcp
docker compose --profile mcp up -d --build faxbot-mcp-sse

iOS App (TestFlight)

The iOS companion lets you send faxes and check status from your phone. Email david@faxbot.net for an invite.

iOS Send Screen

SDKs

  • Python: pip install faxbot
  • Node.js: npm install faxbotSDK Usage

Architecture highlights

  • Traits‑first capabilities: /admin/providers and /admin/config expose active providers + traits; UI and API gate features by traits.
  • Canonical event & error model: normalized inbound/outbound events, status mapping, and standard error codes.
  • Provider adapters: clean boundaries for verify_webhook/parse_inbound/send/status/cancel.

Docs:

Security

  • Use X-API-Key (multi‑key) for auth.
  • Enforce HTTPS and HMAC signature verification for cloud webhooks.
  • No PHI in logs; only IDs/metadata are surfaced.

Contributing

See CONTRIBUTING.md. Please open issues/PRs; this project is GUI‑first and traits‑first—avoid backend‑name checks in new code.

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