This is version 3.1 of Registration API. Check this link to see sample data and scenarios to use RegistrationAPI.  The hostname for YBS and Chelsea brand is ob-ybs.sandbox.ybs.co.uk and ob-che.sandbox.ybs.co.uk respectively.Swagger specification link is here.

Client Registration

Method
Description

DELETE

register-<ClientId>-delete

https://hostname/open-banking/v3.1/tpp-client/register/

To delete TPP App details by passing in client id of the App

GET

register-<ClientId>-get

https://hostname/open-banking/v3.1/tpp-client/register/

To get registration information about TPP by providing client id

PUT

register-<ClientId>-put

https://hostname/open-banking/v3.1/tpp-client/register/

To update TPP App details by passing in client id of the App

POST

register-post

https://hostname/open-banking/v3.1/tpp-client/register

To register a client using a Software Statement Assertion