aid: yorkshire-building-society url: https://raw.githubusercontent.com/api-evangelist/yorkshire-building-society/refs/heads/main/apis.yml name: Yorkshire Building Society kind: company description: >- Yorkshire Building Society (YBS) is a UK mutual building society founded in 1864 and headquartered in Bradford, West Yorkshire. As a member-owned mutual rather than a shareholder-owned bank, it is owned by and run for the benefit of its savers and borrowers, with more than three million customers and around £66 billion in assets across the YBS Group, which trades under the Yorkshire Building Society, Chelsea Building Society (CBS), Norwich & Peterborough and Accord Mortgages brands. YBS is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the PRA as an FCA-authorised ASPSP. Although it is not one of the CMA9 banks mandated to build Open Banking, YBS is a voluntary participant in the UK Open Banking / PSD2 ecosystem and operates a public developer portal at developers.ybs.co.uk that documents its OBIE Read/Write API family - Account Information (AIS), Payment Initiation (PIS), Confirmation of Funds (CBPII), Event Subscriptions, Dynamic Client Registration, and token issuance - conformant to the Open Banking Implementation Entity (OBIE) Read/Write Data API Standard v3.1.2. Access to the production and sandbox surfaces (ob-ybs.api.ybs.co.uk / ob-che.api.ybs.co.uk and the matching sandbox hosts) is secured with FAPI-grade OAuth2/OIDC, PSD2 strong customer authentication, mutual-TLS transport authentication and PS256-signed JWTs, and is available to FCA-authorised third-party providers holding eIDAS/OBIE certificates. image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg tags: - Financial Services - Banking - Building Society - Open Banking - PSD2 - OBIE - FAPI - United Kingdom - Payments - Account Information - Fintech created: '2026-07-23' modified: '2026-07-23' specificationVersion: '0.19' apis: - aid: yorkshire-building-society:ybs-account-information-api name: Yorkshire Building Society Account Information API description: >- OBIE Read/Write Account and Transaction Information (AISP) API v3.1.2 - lets FCA-authorised account information service providers retrieve account, balance, transaction, beneficiary, standing order, direct debit, product, party and statement data for consenting YBS and Chelsea Building Society payment-account customers. FAPI-secured (OAuth2/OIDC, mTLS, PSD2 SCA). humanURL: https://developers.ybs.co.uk/api-catalog/account-information-api baseURL: https://ob-ybs.api.ybs.co.uk/open-banking/v3.1/aisp tags: - Account Information - AISP - Open Banking properties: - type: OpenAPI url: openapi/yorkshire-building-society-account-information-api-openapi.yaml - type: Documentation url: https://developers.ybs.co.uk/api-catalog/account-information-api - type: APIReference url: https://developers.ybs.co.uk/api-catalog/account-information-api - type: GettingStarted url: https://developers.ybs.co.uk/docs/getting-started - aid: yorkshire-building-society:ybs-payment-initiation-api name: Yorkshire Building Society Payment Initiation API description: >- OBIE Read/Write Payment Initiation (PISP) API v3.1.2 - lets FCA-authorised payment initiation service providers set up domestic single, scheduled, standing-order and file payment consents and initiate payments from consenting YBS and Chelsea Building Society accounts. FAPI-secured (OAuth2/OIDC, mTLS, PSD2 SCA). humanURL: https://developers.ybs.co.uk/api-catalog/payment-initiation-api-0 baseURL: https://ob-ybs.api.ybs.co.uk/open-banking/v3.1/pisp tags: - Payment Initiation - PISP - Payments properties: - type: OpenAPI url: openapi/yorkshire-building-society-payment-initiation-api-openapi.yaml - type: Documentation url: https://developers.ybs.co.uk/api-catalog/payment-initiation-api-0 - type: APIReference url: https://developers.ybs.co.uk/api-catalog/payment-initiation-api-0 - type: GettingStarted url: https://developers.ybs.co.uk/docs/getting-started - aid: yorkshire-building-society:ybs-confirmation-of-funds-api name: Yorkshire Building Society Confirmation of Funds API description: >- OBIE Read/Write Confirmation of Funds (CBPII) API v3.1.2 - lets FCA-authorised card-based payment instrument issuers set up a funds confirmation consent and confirm whether a specified amount is available on a consenting YBS or Chelsea Building Society account. FAPI-secured (OAuth2/OIDC, mTLS, PSD2 SCA). humanURL: https://developers.ybs.co.uk/api-catalog/confirmation-funds-api baseURL: https://ob-ybs.api.ybs.co.uk/open-banking/v3.1/cbpii tags: - Confirmation of Funds - CBPII - Open Banking properties: - type: OpenAPI url: openapi/yorkshire-building-society-confirmation-of-funds-api-openapi.yaml - type: Documentation url: https://developers.ybs.co.uk/api-catalog/confirmation-funds-api - type: APIReference url: https://developers.ybs.co.uk/api-catalog/confirmation-funds-api - type: GettingStarted url: https://developers.ybs.co.uk/docs/getting-started - aid: yorkshire-building-society:ybs-event-subscriptions-api name: Yorkshire Building Society Event Subscriptions API description: >- OBIE Read/Write Event Subscriptions API v3.1.2 - lets an onboarded TPP create, read and delete event subscriptions so it can receive aggregated-polling and real-time event notifications (for example consent revocation) for YBS and Chelsea Building Society Open Banking resources. FAPI-secured (OAuth2/OIDC, mTLS). humanURL: https://developers.ybs.co.uk/api-catalog/event-subscriptions-api baseURL: https://ob-ybs.api.ybs.co.uk/open-banking/v3.1/aisp tags: - Event Subscriptions - Notifications - Open Banking properties: - type: OpenAPI url: openapi/yorkshire-building-society-event-subscriptions-api-openapi.yaml - type: Documentation url: https://developers.ybs.co.uk/api-catalog/event-subscriptions-api - type: APIReference url: https://developers.ybs.co.uk/api-catalog/event-subscriptions-api - type: GettingStarted url: https://developers.ybs.co.uk/docs/getting-started - aid: yorkshire-building-society:ybs-dynamic-client-registration-api name: Yorkshire Building Society Dynamic Client Registration API description: >- OBIE Dynamic Client Registration (DCR) API v3.1 - lets an FCA-authorised TPP present its OBIE/eIDAS software statement and register a client application with the YBS and Chelsea Building Society authorization servers. Part of the OBIE security profile; secured with mTLS and PS256-signed JWTs. humanURL: https://developers.ybs.co.uk/api-catalog/dynamic-client-registration-api-0 baseURL: https://ob-ybs.api.ybs.co.uk/register tags: - Dynamic Client Registration - Security - OAuth properties: - type: Documentation url: https://developers.ybs.co.uk/api-catalog/dynamic-client-registration-api-0 - type: APIReference url: https://developers.ybs.co.uk/api-catalog/dynamic-client-registration-api-0 - type: GettingStarted url: https://developers.ybs.co.uk/docs/getting-started - aid: yorkshire-building-society:ybs-generate-access-token-api name: Yorkshire Building Society Generate Access Token API description: >- OBIE token endpoint (Generate Access Token API v3.1.0) - the OAuth2/OIDC token endpoint used by onboarded TPPs to exchange authorization codes and client credentials for access tokens against the YBS and Chelsea Building Society authorization servers. FAPI-secured with mTLS and PS256-signed JWTs. humanURL: https://developers.ybs.co.uk/api-catalog/generate-access-token-api baseURL: https://ob-ybs.api.ybs.co.uk/token tags: - OAuth - Token - Security properties: - type: Documentation url: https://developers.ybs.co.uk/api-catalog/generate-access-token-api - type: APIReference url: https://developers.ybs.co.uk/api-catalog/generate-access-token-api - type: GettingStarted url: https://developers.ybs.co.uk/docs/getting-started common: - type: AgenticAccess url: agentic-access/yorkshire-building-society-agentic-access.yml - type: DomainSecurity url: security/yorkshire-building-society-domain-security.yml - type: OAuthScopes url: scopes/yorkshire-building-society-scopes.yml - type: Authentication url: authentication/yorkshire-building-society-authentication.yml - type: WellKnown url: well-known/yorkshire-building-society-well-known.yml - type: Conformance url: conformance/yorkshire-building-society-conformance.yml - type: ErrorCatalog url: errors/yorkshire-building-society-problem-types.yml - type: Lifecycle url: lifecycle/yorkshire-building-society-lifecycle.yml - type: Conventions url: conventions/yorkshire-building-society-conventions.yml - type: Idempotency url: conventions/yorkshire-building-society-conventions.yml - type: Sandbox url: sandbox/yorkshire-building-society-sandbox.yml - type: DataModel url: data-model/yorkshire-building-society-data-model.yml - type: Webhooks url: asyncapi/yorkshire-building-society-events-webhooks.yml - type: MCPServer url: mcp/yorkshire-building-society-mcp.yml - type: ToolCrosswalk url: mcp/yorkshire-building-society-tool-crosswalk.yml - type: AgentSkill url: skills/_index.yml - type: LLMsTxt url: llms/yorkshire-building-society-llms.txt - type: Overlay name: Account Information API overlay url: overlays/yorkshire-building-society-account-information-api-overlay.yaml - type: Overlay name: Payment Initiation API overlay url: overlays/yorkshire-building-society-payment-initiation-api-overlay.yaml - type: Overlay name: Confirmation of Funds API overlay url: overlays/yorkshire-building-society-confirmation-of-funds-api-overlay.yaml - type: Overlay name: Event Subscriptions API overlay url: overlays/yorkshire-building-society-event-subscriptions-api-overlay.yaml - type: Website url: https://www.ybs.co.uk/ - type: DeveloperPortal url: https://developers.ybs.co.uk/ - type: Documentation url: https://developers.ybs.co.uk/docs/getting-started - type: GettingStarted url: https://developers.ybs.co.uk/docs/getting-started - type: Support url: https://developers.ybs.co.uk/support - type: TermsOfService url: https://developers.ybs.co.uk/legal - type: PrivacyPolicy url: https://developers.ybs.co.uk/privacy-policy - type: LinkedIn url: https://www.linkedin.com/company/yorkshire-building-society maintainers: - FN: Kin Lane email: kin@apievangelist.com