# Tandem Bank Payment Initiation API (PIS)

**Canonical:** https://apis.io/apis/tandem-bank/tandem-bank-payment-initiation-api/  
**Provider:** Tandem Bank — https://apis.io/providers/tandem-bank/  
**Documentation:** https://developer.token.io/

Tandem Bank Payment Initiation API (PIS) is one of 3 APIs that [Tandem Bank](https://apis.io/providers/tandem-bank/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Payment Initiation, PISP, and Open Banking. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

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.

## Machine-readable artifacts (4)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/tandem-bank/refs/heads/main/openapi/obie-standard-payment-initiation-openapi.yaml
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/tandem-bank/refs/heads/main/overlays/tandem-bank-payment-initiation-overlay.yaml
- **Documentation** — https://developer.token.io/
- **APIReference** — https://github.com/OpenBankingUK/read-write-api-specs

## Other Tandem Bank APIs (2)

- [Tandem Bank Account and Transaction Information API (AIS)](https://apis.io/apis/tandem-bank/tandem-bank-account-transaction-information-api/)
- [Tandem Bank Confirmation of Funds API (CBPII)](https://apis.io/apis/tandem-bank/tandem-bank-confirmation-of-funds-api/)

## Tags

Payment Initiation, PISP, Open Banking

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/tandem-bank/tandem-bank-payment-initiation-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/tandem-bank/.