Platforms/Tools/Guides/Web SDK Integration

Web SDK Integration

Embed the Fiserv Platform web SDK to run seller onboarding, identity verification, and payout account setup in an iframe on your site, instead of calling the Party Boarding APIs yourself. Your backend only proxies a session token request.

Step 1: Understand the integration model

Step 1 of 10

The web SDK runs the complete seller onboarding experience inside an iframe on your site: business and representative details, phone verification, document upload and liveness, review and consent, and payout account setup. The FFP host holds the CommerceHub HMAC credentials and calls the Party Boarding and Funds APIs for you, so your backend never handles a Fiserv API secret.

ℹUse the SDK when you want the ready-made onboarding experience instead of integrating each Party Boarding API yourself. The SDK calls the same CommerceHub APIs on your behalf.

ℹYour part: get a session token from your backend, call initFfp(), call createOnboardingWidget(), mount it, and react to two events, ffp:complete and ffp:abort.

ℹBrowser support: native ES modules and dynamic import(), iframes with postMessage, and ResizeObserver. All evergreen browsers qualify.

ℹThe liveness check uses the camera, so serve your page and the FFP host over HTTPS (or localhost). If you nest the widget in an iframe of your own, every level must allow camera.

ℹYour backend only needs to make a server-to-server POST and return JSON. No SDK, library, or Fiserv credential is required on your side.

ℹSupported languages: English (en-US), French (fr-CA), and Spanish (es-US).