Openfax Cloud Fax API

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

Openfax Cloud Fax API is ranked #3 of 105 in online fax services on Inferse, made by Openfax Cloud Fax API (Walnut, California, United States). It runs on API, Web. There is no free plan. A free trial is offered. Paid plans start at $0.03/mo.

Compared on online fax services

Free plan: Noopenfax.com
Inbound faxing: Yesopenfax.com
Outbound faxing: Yesopenfax.com
Delivery tracking: Yesopenfax.com
Webhook events: Yesopenfax.com

Facts

API purpose: The Openfax Cloud Fax API provides developers access to global facsimile services.apidocs.openfax.com · 30 Sept 2026
Fax operations: The API supports single faxes, fax broadcasts, mail-merge broadcasts, inbound fax numbers and fax reception.apidocs.openfax.com · 30 Sept 2026
Delivery integrations: Received faxes can be delivered by email, AWS S3 cloud storage or webhook postback.apidocs.openfax.com · 30 Sept 2026
Account requirements: Using the API requires an account, account number and API key obtained from the portal.apidocs.openfax.com · 30 Sept 2026
Developer credits: Openfax offers free developer trial credits after registration when contacted.apidocs.openfax.com · 30 Sept 2026
PDF limit: The API limits the Base64-encoded PDF input to 50MB.apidocs.openfax.com · 30 Sept 2026
Retries: Single-fax delivery uses up to three redial attempts with a four-minute wait between attempts.apidocs.openfax.com · 30 Sept 2026
Scheduling: Web fax broadcasts can be sent immediately or scheduled for a chosen date and time.openfax.com · 30 Sept 2026
Reporting: Broadcast jobs provide an email summary and JobID_Success.csv and JobID_Failed.csv attachments.openfax.com · 30 Sept 2026
Broadcast modes: Standard broadcasts remove duplicate fax numbers, while mail merge personalizes each fax from list data.openfax.com · 30 Sept 2026
Free test fax: Free proof-copy test faxing is available for broadcast fax orders.openfax.com · 30 Sept 2026
Opt-out compliance: The optional Fax Removal Service supplies a dedicated toll-free number for mass-fax opt-out requests.openfax.com · 30 Sept 2026
Support: API support is offered by phone, chat, email, Slack invite and Skype invite.apidocs.openfax.com · 30 Sept 2026
Data handling: Openfax states that it does not share customer data except when required by law.openfax.com · 30 Sept 2026
Spreadsheet limit: Openfax does not support multiple worksheets in Excel fax-list files.openfax.com · 30 Sept 2026