Concord Fax API
Concord Fax API: A mature SOAP-based API for two-way fax workflows with status tracking and push notifications. Ranked #18 of 26 in Fax APIs by our editors (7.5/10); pricing: Paid; best for legacy SOAP integrations needing two-way faxing.
At a glance
- Editor score7.5 / 10
- PricingPaid
- Best forLegacy SOAP integrations needing two-way faxing
- Inbound faxingYes
- Founded1996 · Seattle, Washington, USA
- Facts checked20 Sep 2026
Where it wins
- Supports both inbound and outbound fax workflows
- Real-time status queries and HTTP push notifications
- SOAP, WSDL, HTTPS, and OAuth 2.0 support
Where it doesn't
- SOAP focus may not suit teams seeking modern API protocols
- Additional pages are charged per page
- Toll-free numbers carry a surcharge on FaxPro 1000
Our verdict on Concord Fax API
Concord Fax API connects business applications to inbound and outbound fax workflows through Concord’s cloud fax platform. It is designed for businesses, healthcare organizations, and other regulated enterprises that need applications to send documents, receive faxes, track delivery, and retrieve inbound transmissions. The service also includes account management functions and supports OAuth 2.0 authentication.
Pricing is organized through the FaxPro 100, FaxPro 300, and FaxPro 1000 plans. FaxPro 100 includes 50 inbound and 50 outbound pages, plus one toll-free line. FaxPro 300 includes 150 inbound and 150 outbound pages, also with one toll-free line. FaxPro 1000 provides 1,000 combined inbound or outbound pages and includes a DID; its toll-free number carries a surcharge. Additional pages are charged per page across the plans. Concord also describes API access as pay-as-you-go, while its public pricing page presents the FaxPro plans.
The main technical fit is its SOAP web-service endpoint and WSDL documentation, supported by sample code and HTTPS requirements. Developers can submit faxes to one or more recipients, receive inbound faxes into applications, query delivery status, and receive HTTP push notifications for completed jobs and inbound delivery. That combination suits established integrations that depend on SOAP and need two-way faxing with event-driven updates. Teams building around newer API protocols, or those that do not need fax reception and delivery tracking, may find the SOAP-centered approach less suitable.
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Concord Fax API pricing
All 3 Concord Fax API plans and prices →
Concord Fax API fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Not verified |
| Inbound faxing | Yes |
| Outbound faxing | Yes |
| Delivery tracking | Yes |
| Webhook events | Yes |
| API protocol | Soap |
| Included pages | 100 pages |
| Deployment | Cloud |
| Platforms | Web |
| Compliance & security | SOC 2, HIPAA |
| Support | Email, Phone, Docs |
| Built for | Mid-market, Enterprise (editorial estimate) |
| Pricing | Paid (source) |
| Website | developer.concordfax.com |
| Facts checked | 20 Sep 2026 |
Alternatives to Concord Fax API
- Telnyx Fax APIA low per-page REST fax API with inbound, outbound, tracking, and webhook support.9.4
- PhaxioA feature-rich fax API for sending, receiving, tracking, and routing documents.9.2
- FaxxingA practical free-start fax API with inbound support, signed webhooks, and usage-based pricing.9.1
See all Concord Fax API alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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