KYC SDK Integration Flow KYC SDK Integration Applicant Client Web/Mobile App Client Backend Sumsub Payblr Starts KYC verification Request KYC session Generate SDK access token Provide externalUserId and levelName Return SDK access token/session details Get applicant data with externalUserId Provide applicantId Provide custom fields via Change profile data details Applicant Updated Provide SDK access token Launch WebSDK/MobileSDK Complete verification steps Perform automatic check / manual review Send applicantReviewed result Get applicant review status applicantReviewed webhook or Get applicant data API alt [GREEN] Verification completed [RED] Verification rejected Route to compliance review Approve, reject, or request action Final handling result Applicant Client Web/Mobile App Client Backend Sumsub Payblr