KYC API Integration Flow KYC API Integration Client System Sumsub Payblr Generate an app token Create applicant with sourceKey, externalUserId, full fixedInfo, and metadata Return applicantId Upload ID, PoA if required, selfie, and questionnaire Optional PATCH fixedInfo when correcting, refreshing, or resuming Preflight requiredIdDocsStatus and request review Perform verification checks Send applicantReviewed result Get applicant review status applicantReviewed webhook or Get applicant data API alt [GREEN] Verification completed [RED] Verification rejected, retry required, or review required Route to compliance review Approve, reject, or request action Final handling result Client System Sumsub Payblr