aid: gb-bank url: https://raw.githubusercontent.com/api-evangelist/gb-bank/refs/heads/main/apis.yml name: GB Bank kind: company description: GB Bank Limited is a UK challenger bank headquartered in Middlesbrough (2 Centre Square) with a London office (73 Brook Street, Mayfair). Wholly owned and privately backed rather than a mutual building society, it secured its full UK banking licence in 2022 and is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the PRA (Financial Services Register number 850286). GB Bank funds SME regional property developers and investors with development finance, buy-to-let and bridging loans (typically between £26k and £5m across underserved UK regions) and funds that lending with retail deposits - fixed-rate bonds, notice accounts and easy-access savings accounts protected by the FSCS up to £85,000, managed through an online portal and a GB Bank mobile app. As a small, non-CMA9 FCA-authorised bank focused on savings and secured lending, GB Bank does not operate a public developer portal or a documented UK Open Banking (OBIE / PSD2) API surface; the Open Banking API families listed here are represented as the shared industry standard the bank would conform to as an FCA-authorised ASPSP, and are unverified for GB Bank pending a confirmed developer portal or Open Data endpoint. image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg tags: - Financial Services - Banking - Open Banking - PSD2 - OBIE - United Kingdom - Payments - Account Information - Savings - Property Finance - SME Lending - Fintech created: '2026-07-23' modified: '2026-07-23' specificationVersion: '0.19' apis: - aid: gb-bank:gb-bank-open-data-api name: GB Bank Open Data API description: >- UK Open Banking Open Data API (OBIE standard, v1.3) - the public, unauthenticated reference-data surface for ATMs, Branches, Personal Current Accounts, Business Current Accounts, Unsecured SME Loans and Commercial Credit Cards. Represented here as the shared OBIE Open Data Standard; UNVERIFIED for GB Bank - no live Open Data endpoint was confirmed on a gbbank.co.uk host (no fabricated base URL). humanURL: https://github.com/OpenBankingUK/opendata-api-docs-pub baseURL: '' tags: - Open Data - ATMs - Branches - Reference Data - Unauthenticated properties: - type: OpenAPI url: openapi/uk-open-banking-open-data-api-openapi.json - type: Documentation url: https://github.com/OpenBankingUK/opendata-api-docs-pub - type: APIReference url: https://github.com/OpenBankingUK/opendata-api-spec-compiled - aid: gb-bank:gb-bank-account-transaction-information-api name: GB Bank Account and Transaction Information API (AIS) description: >- UK Open Banking Read/Write Account & Transaction Information API (AISP) - the OBIE standard for accessing account, balance, transaction and statement data with customer consent. FAPI-secured (OAuth2/OIDC, mTLS, PSD2 SCA). Represented here as the shared OBIE Read/Write Standard; UNVERIFIED for GB Bank - no GB Bank developer portal or production/sandbox base URL was found (no fabricated host). humanURL: https://github.com/OpenBankingUK/read-write-api-specs baseURL: '' tags: - Account Information - Transactions - AISP - FAPI properties: - type: OpenAPI url: openapi/uk-open-banking-account-info-api-openapi.yaml - type: Documentation url: https://standards.openbanking.org.uk/ - type: APIReference url: https://github.com/OpenBankingUK/read-write-api-specs - aid: gb-bank:gb-bank-payment-initiation-api name: GB Bank Payment Initiation API (PIS) description: >- UK Open Banking Read/Write Payment Initiation API (PISP) - the OBIE standard for initiating domestic, scheduled, standing-order, international and file payments with customer consent. FAPI-secured (OAuth2/OIDC, mTLS, PSD2 SCA). Represented here as the shared OBIE Read/Write Standard; UNVERIFIED for GB Bank - no GB Bank developer portal or base URL was confirmed (no fabricated host). humanURL: https://github.com/OpenBankingUK/read-write-api-specs baseURL: '' tags: - Payment Initiation - Payments - PISP - FAPI properties: - type: OpenAPI url: openapi/uk-open-banking-payment-initiation-api-openapi.yaml - type: Documentation url: https://standards.openbanking.org.uk/ - type: APIReference url: https://github.com/OpenBankingUK/read-write-api-specs - aid: gb-bank:gb-bank-confirmation-of-funds-api name: GB Bank Confirmation of Funds API (CBPII) description: >- UK Open Banking Read/Write Confirmation of Funds API (CBPII) - the OBIE standard for confirming whether funds are available on a payment account with customer consent. FAPI-secured (OAuth2/OIDC, mTLS, PSD2 SCA). Represented here as the shared OBIE Read/Write Standard; UNVERIFIED for GB Bank - no GB Bank developer portal or base URL was confirmed (no fabricated host). humanURL: https://github.com/OpenBankingUK/read-write-api-specs baseURL: '' tags: - Confirmation of Funds - CBPII - FAPI properties: - type: OpenAPI url: openapi/uk-open-banking-confirmation-of-funds-api-openapi.yaml - type: Documentation url: https://standards.openbanking.org.uk/ - type: APIReference url: https://github.com/OpenBankingUK/read-write-api-specs common: - type: DomainSecurity url: security/gb-bank-domain-security.yml - type: AgenticAccess url: agentic-access/gb-bank-agentic-access.yml - type: OAuthScopes url: scopes/gb-bank-scopes.yml - type: Authentication url: authentication/gb-bank-authentication.yml - type: Conventions url: conventions/gb-bank-conventions.yml - type: Idempotency url: conventions/gb-bank-conventions.yml - type: ErrorCatalog url: errors/gb-bank-problem-types.yml - type: Conformance url: conformance/gb-bank-conformance.yml - type: DataModel url: data-model/gb-bank-data-model.yml - type: LLMsTxt url: llms/gb-bank-llms.txt - type: Website url: https://www.gbbank.co.uk/ - type: Savings url: https://www.gbbank.co.uk/savings - type: MobileApp url: https://www.gbbank.co.uk/gb-bank-mobile-app - type: Support url: https://www.gbbank.co.uk/help-and-support/faqs - type: Blog url: https://www.gbbank.co.uk/news - type: TermsOfService url: https://www.gbbank.co.uk/terms - type: PrivacyPolicy url: https://www.gbbank.co.uk/privacy-policy - type: LinkedIn url: https://www.linkedin.com/company/thegbb - type: Standard name: UK Open Banking Open Data Standard url: https://github.com/OpenBankingUK/opendata-api-spec-compiled - type: Standard name: UK Open Banking Read/Write API Standard url: https://standards.openbanking.org.uk/ maintainers: - FN: Kin Lane email: kin@apievangelist.com