get
https://api.ext-sandbox.fourthline.com/v1/signatures//otp
External QTSP only (Namirial or InfoCert). Fourthline as the QTSP does not use OTP.
Sandbox environment only: Use this endpoint to retrieve the one-time passcode (OTP) for a test signature, after Authorize signature.
Call this endpoint when Signatures.status is confirmation_required, then pass the OTP in Confirm signature. Important: Handle OTP data as sensitive information. This endpoint is for sandbox testing and does not replace SMS OTP in production.