API fundamentals
Authenticate requests, validate signatures, and test your integration in the Trustly sandbox.
Trustly’s API uses OAuth for authentication and cryptographic signatures for request integrity. Use the sandbox environment to test your integration before going live.
Authentication and OAuth
OAuth login authorization flows for bank-side authentication.
Secure requests and signature validation
Generate and validate cryptographic signatures for API requests.
Idempotency
Prevent duplicate operations with unique merchant references.
Testing
Use the sandbox environment and demo banks to simulate transactions.