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Openfax Cloud Fax API

openfax.com

From $0.03/mo Free trial WebAPI
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Spec score 8.1 #39 of 103 in Online Fax Services

Spec sheet

Free plan
NoRead 20 Sep 2026 · openfax.com
Support
API support is offered by phone, chat, email, Slack invite and Skype invite.Read 30 Sep 2026 · apidocs.openfax.com
Founded
1999Read 28 Sep 2026 · openfax.com
Account requirements
Using the API requires an account, account number and API key obtained from the portal.Read 30 Sep 2026 · apidocs.openfax.com
API purpose
The Openfax Cloud Fax API provides developers access to global facsimile services.Read 30 Sep 2026 · apidocs.openfax.com
Broadcast modes
Standard broadcasts remove duplicate fax numbers, while mail merge personalizes each fax from list data.Read 30 Sep 2026 · openfax.com
Data handling
Openfax states that it does not share customer data except when required by law.Read 30 Sep 2026 · openfax.com
Delivery integrations
Received faxes can be delivered by email, AWS S3 cloud storage or webhook postback.Read 30 Sep 2026 · apidocs.openfax.com
Developer credits
Openfax offers free developer trial credits after registration when contacted.Read 30 Sep 2026 · apidocs.openfax.com
Fax operations
The API supports single faxes, fax broadcasts, mail-merge broadcasts, inbound fax numbers and fax reception.Read 30 Sep 2026 · apidocs.openfax.com
Free test fax
Free proof-copy test faxing is available for broadcast fax orders.Read 30 Sep 2026 · openfax.com
Opt-out compliance
The optional Fax Removal Service supplies a dedicated toll-free number for mass-fax opt-out requests.Read 30 Sep 2026 · openfax.com
PDF limit
The API limits the Base64-encoded PDF input to 50MB.Read 30 Sep 2026 · apidocs.openfax.com
Reporting
Broadcast jobs provide an email summary and JobID_Success.csv and JobID_Failed.csv attachments.Read 30 Sep 2026 · openfax.com
Retries
Single-fax delivery uses up to three redial attempts with a four-minute wait between attempts.Read 30 Sep 2026 · apidocs.openfax.com
Scheduling
Web fax broadcasts can be sent immediately or scheduled for a chosen date and time.Read 30 Sep 2026 · openfax.com
Spreadsheet limit
Openfax does not support multiple worksheets in Excel fax-list files.Read 30 Sep 2026 · openfax.com

Plans and prices

Standard fax broadcast $0.03 a month Per-page pricing is subject to 60-second transmission times; longer transmissions may be billed per minute at the same r US-48 and Canada pricing is listed at $0.03 per page Read 20 Sep 2026 · openfax.com
Mail merge services broadcast $0.04 a month Per-page pricing is subject to 60-second transmission times; longer transmissions may be billed per minute at the same r US-48 and Canada pricing is listed at $0.04 per page Read 20 Sep 2026 · openfax.com
Fax broadcasting $3, paid once per page; international destinations may use per-minute rates US, Canada and worldwide destinations · no monthly fees Read 30 Sep 2026 · openfax.com

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