TSB Bank · Authentication Profile

Tsb Bank Authentication

Authentication

TSB Bank secures its APIs with oauth2, openIdConnect, and mutualTLS across 3 declared security schemes, as derived from its OpenAPI definitions. OAuth 2.0 is offered via the implicit, authorizationCode, and refreshToken flow(s).

Financial ServicesBankingOpen BankingPSD2OBIEUnited KingdomPaymentsAccount InformationFAPIFintech
Methods: oauth2, openIdConnect, mutualTLS Schemes: 3 OAuth flows: implicit, authorizationCode, refreshToken API key in:

Security Schemes

OAuth2 oauth2
· flows: implicit, authorizationCode
OpenIDConnect openIdConnect
mutualTLS mutualTLS

Source

Authentication Profile

Raw ↑ 
generated: '2026-07-23'
method: searched
source: openapi/tsb-bank-oauth-server-openapi.json
docs: https://apis.tsb.co.uk/.well-known/openid-configuration
notes: >-
  Enriched from TSB's live OpenID Provider discovery document. TSB runs a Curity
  OAuth Toolkit (OTK) server as its OpenID Provider. The unauthenticated Open
  Data API carries no security scheme (public reference data). The FAPI-secured
  OBIE Read/Write services (AIS/PIS/CBPII) require OAuth2/OIDC with mutual-TLS
  client authentication, request-object signing, and PSD2 strong customer
  authentication, and are gated behind developer-portal onboarding with
  OBIE/eIDAS certificates.
summary:
  types: [oauth2, openIdConnect, mutualTLS]
  oauth2_flows: [implicit, authorizationCode, refreshToken]
  token_endpoint_auth_methods:
  - client_secret_basic
  - client_secret_post
  - client_secret_jwt
  - private_key_jwt
  strong_customer_authentication: true
  fapi: true
schemes:
- name: OAuth2
  type: oauth2
  flows:
  - flow: implicit
    authorizationUrl: https://apis.tsb.co.uk/auth/oauth/v2/authorize
    scopes: 5
  - flow: authorizationCode
    authorizationUrl: https://apis.tsb.co.uk/auth/oauth/v2/authorize
    tokenUrl: https://apis.tsb.co.uk/auth/oauth/v2/token
  sources: [openapi/tsb-bank-oauth-server-openapi.json, well-known/tsb-bank-openid-configuration.json]
- name: OpenIDConnect
  type: openIdConnect
  openIdConnectUrl: https://apis.tsb.co.uk/.well-known/openid-configuration
  issuer: https://apis.tsb.co.uk:8443
  userinfo_endpoint: https://apis.tsb.co.uk/openid/connect/v1/userinfo
  jwks_uri: https://apis.tsb.co.uk/openid/connect/jwks.json
  registration_endpoint: https://apis.tsb.co.uk/openid/connect/register
  id_token_signing_alg_values_supported: [RS256, HS256]
  sources: [well-known/tsb-bank-openid-configuration.json]
- name: mutualTLS
  type: mutualTLS
  description: >-
    OBIE FAPI security profile requires mutual-TLS (eIDAS QWAC/OBIE transport
    certificate) between the TPP and TSB for the Read/Write services.
  sources: [obie-security-profile]