Documo (mFax)

Documo’s mFax API is another fast-start cloud option. Like Sinch, Faxbot uploads your files directly so you can stay entirely private behind a tunnel or LAN.

Gather before you start

Documo API Key (Dashboard → Developers)
Decide whether you are pointing at Production or Sandbox
Optional base URL override if Documo provisions a regional endpoint

Configure with the Setup Wizard

Admin Console → Setup Wizard
Choose Documo (mFax)
Enter your API Key and toggle Sandbox mode if needed
Apply. Faxbot validates the key with a lightweight call before saving

Send a fax from the UI

Open Send Fax
Upload PDF/TXT → enter destination number
Submit. Faxbot pushes the file to Documo immediately and shows the Documo job ID in Diagnostics
Use Jobs to monitor completion; the grid links to Documo’s status page when available

Security & compliance

Faxbot never stores Documo credentials in logs; they live in the plugin config store
Storage defaults to “no provider retention.” Double-check in Documo that document storage is disabled when handling PHI
Rate-limit inbound API traffic via your reverse proxy like any production deployment

Troubleshooting

Job never appears → Confirm you chose the correct environment (Production vs Sandbox)
401 from provider → Regenerate the API key and rerun the wizard
413 file too large → Adjust the Faxbot MAX_FILE_SIZE_MB setting under Settings → File Handling

References

Sign up & pricing: https://www.mfax.io/pricing
API documentation: https://docs.documo.com

How it works (under the hood)

Faxbot uploads the PDF directly via Documo’s REST API using your API key
Status is derived from the provider’s response and optional follow-up checks
Admin coverage: Diagnostics shows the configured environment and basic auth presence; Jobs store the provider job ID