Openfax Cloud Fax API

7.1easy start · #46of 105
in Online Fax Services

Free to practise onno
Free trialyes
Well documentedyes
Runs where you workno

Runs on api, Web. Paid plans from $0.03/mo.

Openfax Cloud Fax API is ranked #46 of 105 in online fax services on The Geeks Club, 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.

Openfax Cloud Fax API plans and pricing

All plans

Standard fax broadcast $0.03/mo 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 openfax.com · 20 Sept 2026

Mail merge services broadcast $0.04/mo 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 openfax.com · 20 Sept 2026

Fax broadcasting $3 once per page; international destinations may use per-minute rates US, Canada and worldwide destinations · no monthly fees openfax.com · 30 Sept 2026

Compared on online fax services

Free plan: No
Inbound faxing: Yes
Outbound faxing: Yes
Delivery tracking: Yes
Webhook events: Yes

Best Openfax Cloud Fax API alternatives

See all 20

GTC Cloud-Fax Lesson 18.8 OTG Networks vFax Lesson 28.6 Dropbox Fax (formerly HelloFax) Lesson 38.5 FAX.PLUS Lesson 48.4 InterFAX Lesson 58.3 FaxTerra Lesson 68.3

The record

API purpose: The Openfax Cloud Fax API provides developers access to global facsimile services.
Fax operations: The API supports single faxes, fax broadcasts, mail-merge broadcasts, inbound fax numbers and fax reception.
Delivery integrations: Received faxes can be delivered by email, AWS S3 cloud storage or webhook postback.
Account requirements: Using the API requires an account, account number and API key obtained from the portal.
Developer credits: Openfax offers free developer trial credits after registration when contacted.
PDF limit: The API limits the Base64-encoded PDF input to 50MB.
Retries: Single-fax delivery uses up to three redial attempts with a four-minute wait between attempts.
Scheduling: Web fax broadcasts can be sent immediately or scheduled for a chosen date and time.
Reporting: Broadcast jobs provide an email summary and JobID_Success.csv and JobID_Failed.csv attachments.
Broadcast modes: Standard broadcasts remove duplicate fax numbers, while mail merge personalizes each fax from list data.
Free test fax: Free proof-copy test faxing is available for broadcast fax orders.
Opt-out compliance: The optional Fax Removal Service supplies a dedicated toll-free number for mass-fax opt-out requests.
Support: API support is offered by phone, chat, email, Slack invite and Skype invite.
Data handling: Openfax states that it does not share customer data except when required by law.
Price from: $0.03/mo

Where it ranks on The Geeks Club

Best Online Fax Services in 2026#46 of 105

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Sources

apidocs.openfax.com· checked 30 Sept 2026
openfax.com· checked 30 Sept 2026
openfax.com/reports/· checked 30 Sept 2026
openfax.com/tos/· checked 30 Sept 2026
openfax.com/faxlists/· checked 30 Sept 2026