Sinch Fax API is a cloud-based service for sending and receiving faxes through an API. The REST API supports inbound and outbound faxing, delivery tracking, and webhook events for arriving or completed faxes. It accepts Basic or OAuth 2 authentication. If storage is enabled, fax logs and media are retained for 13 months before deletion. Listed formats include DOC, DOCX, PDF, TIF, JPG, TXT, PNG, URL, and HTML. A customer portal shows fax send and receive times and status, and lets users manage users, groups, roles, and permissions. Customers can select local or toll-free numbers, or bring their own. Sinch describes intelligent routing and automatic retries for failed transmissions, and says its U.S. fax-processing network has 99.999% uptime and redundant infrastructure. It says the service supports HIPAA, SOC 2, and GDPR compliance needs, with encryption and secure transmission methods for healthcare data. A free Sinch Build Dashboard account is required to use the API; signup includes a free virtual number for testing. Pay-as-you-go costs 0.05 USD per page, while pricing is also available on request. A Fax API service can have one webhook at a time, allowing one inbound fax trigger per service in Zapier.
Who it is for
It suits startups and established companies that need to send or receive faxes through an API, including teams in healthcare, legal, finance, insurance, or real estate. Developers can use the REST API, webhooks, and listed Zapier integration.
What is good
- Supports inbound and outbound faxing with delivery tracking.
- Retries failed transmissions automatically.
- Offers local and toll-free numbers or bring-your-own numbers.
- Free signup includes a virtual number for testing.
What to know first
- A service can have only one webhook at a time.
- Stored fax logs and media are deleted after 13 months.
- Requires a free Sinch Build Dashboard account to start.
- Pricing is available on request.
Verdict
Sinch Fax API provides fax transmission and management through a REST API, with a portal and listed file formats. Note the single-webhook limit and the per-page rate when assessing fit.
Get started with Sinch Fax API
- Create a free Sinch Build Dashboard account.
- Use the free virtual number included with signup for testing.
- Choose a local or toll-free number, or bring an existing number.
- Connect through the REST API using Basic or OAuth 2 authentication.
- Use the developer documentation and an SDK for Node.js, Java, .NET, or Python.
- For Zapier, configure the send-a-fax action or inbound fax trigger.
Limits to know first
The listed Pay-as-you-go rate is 0.05 USD per page. A Fax API service supports one webhook at a time, allowing one inbound fax trigger per service in Zapier; the listed concurrent call limit is 10 calls.
Questions about Sinch Fax API
How much does Sinch Fax API cost?
The Pay-as-you-go rate is 0.05 USD per page. Pricing is also available on request.
Is there a free plan or way to test it?
A free Sinch Build Dashboard account is required to use Fax API, and signup includes a free virtual number for testing.
Which platforms and programming languages are supported?
The listed platforms are API and web. SDK languages are Node.js, Java, .NET, and Python.
What authentication does the API support?
The REST API supports Basic or OAuth 2 authentication.
Does it integrate with Zapier?
Yes. Zapier has an inbound fax trigger and a send-a-fax action. Each API service can have one webhook at a time, so it allows one inbound fax trigger per service.
What fax activity can be tracked?
The service supports delivery tracking and webhook events for arriving or completed faxes. With storage enabled, fax logs and media are retained for 13 months before deletion.
Sinch Fax API plans and pricing
All plansCompared on SIP trunking providers
- Free plan
- No
- Inbound faxing
- Yes
- Outbound faxing
- Yes
- Delivery tracking
- Yes
- Webhook events
- Yes
- API protocol
- rest
