Tandem Bank Payment Initiation API (PIS)
Tandem Bank's Open Banking Payment Initiation Service (PIS) for initiating domestic and other payments against Tandem accounts. Delivered through Tandem's PSD2 dedicated interface (provided by Token), conformant to the OBIE Read/Write Payment Initiation API Standard. FAPI-secured (OAuth2/OIDC, mutual-TLS, PSD2 SCA); production base URL is issued per authorised TPP during Token onboarding and is not publicly published. The attached OpenAPI is the shared OBIE standard specification, not a Tandem-proprietary contract.
Documentation
Documentation
https://developer.token.io/
APIReference
https://github.com/OpenBankingUK/read-write-api-specs