post https://pay-api.truelayer-sandbox.com/v2/single-immediate-payments//embedded-auth-steps//submission
Some of the European banks require the embedded authorisation flow, which consists of multiple steps provided by the banks. Each step can be submitted via this endpoint. The response includes the information required for the next step to follow.
The Payments API v3 is the latest version of the TrueLayer payments API. Use it for all new integrations.