TSB Bank

TSB Bank plc is a British retail and commercial bank headquartered in Edinburgh, offering current accounts, savings, mortgages, personal loans, credit cards, and insurance to personal and business customers across the United Kingdom. Spun out of Lloyds Banking Group in 2013 and listed before being acquired in 2015, TSB is a wholly owned subsidiary of the Spanish banking group Banco Sabadell. It is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the PRA. As an FCA-authorised account servicing payment service provider (ASPSP) under PSD2, TSB participates in UK Open Banking and publishes its APIs conformant to the Open Banking Implementation Entity (OBIE) standards through a public developer portal at apis.developer.tsb.co.uk. TSB is not one of the nine CMA-mandated banks (CMA9) but implements the same OBIE Open Data and Read/Write API family: unauthenticated Open Data reference APIs plus FAPI-secured Account and Transaction Information (AIS), Payment Initiation (PIS), and Confirmation of Funds (CBPII) services secured with OAuth2/OIDC, mutual-TLS, and PSD2 strong customer authentication.

TSB Bank publishes 2 APIs on the APIs.io network: TSB Open Data API and TSB OAuth Toolkit (OTK) Server. Tagged areas include Financial Services, Banking, Open Banking, PSD2, and OBIE.

TSB Bank’s developer surface includes authentication, documentation, support, and 23 more developer resources.

42.7/100 thin ▬ flat Agent 81/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
5 APIs 1 MCP Servers
Financial ServicesBankingOpen BankingPSD2OBIEUnited KingdomPaymentsAccount InformationFAPIFintech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 42.7/100 · thin
Contract Quality 9.4 / 25
Developer Ergonomics 9.6 / 20
Commercial Clarity 4.2 / 20
Operational Transparency 1.4 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 81/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 3 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/tsb-bank: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 5

Individual APIs this provider publishes, each with its own machine-readable definition.

TSB Open Data API

TSB's public, unauthenticated Open Data API conformant to the OBIE Open Data API Standard, exposing reference data for ATMs, branches, personal current accounts, business curren...

TSB Account and Transaction Information API (AIS)

TSB's OBIE Read/Write Account and Transaction Information (AIS) API, providing authorised third-party providers read access to account, balance, transaction, beneficiary, standi...

TSB Payment Initiation API (PIS)

TSB's OBIE Read/Write Payment Initiation (PIS) API, enabling authorised third-party providers to initiate domestic and scheduled payments and standing orders on behalf of consen...

TSB Confirmation of Funds API (CBPII)

TSB's OBIE Read/Write Confirmation of Funds (CBPII) API, allowing authorised card-based payment instrument issuers to confirm whether funds are available on a customer account. ...

TSB OAuth Toolkit (OTK) Server

TSB's OpenID Connect / OAuth2 authorization server (Curity OAuth Toolkit, OTK Server APIs v4.3.1), backing the FAPI-secured OBIE Read/Write services. Exposes the authorize, toke...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

tsb-bank-mcp.yml

MCP SERVER

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Tsb Bank Authentication

oauth2/openIdConnect/mutualTLS · 3 schemes

SECURITY

Tsb Bank Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Tsb Bank Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Tsb Bank Scopes

9 scopes · implicit

9 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Tsb Bank Agentic Access

31 operations · 6 acting · 1 human-in-the-loop

31 operations · 6 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 6

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: tsb-bank
url: https://raw.githubusercontent.com/api-evangelist/tsb-bank/refs/heads/main/apis.yml
name: TSB Bank
kind: company
description: 'TSB Bank plc is a British retail and commercial bank headquartered in Edinburgh, offering current accounts,
  savings, mortgages, personal loans, credit cards, and insurance to personal and business customers across the United Kingdom.
  Spun out of Lloyds Banking Group in 2013 and listed before being acquired in 2015, TSB is a wholly owned subsidiary of the
  Spanish banking group Banco Sabadell. It is authorised by the Prudential Regulation Authority and regulated by the Financial
  Conduct Authority and the PRA. As an FCA-authorised account servicing payment service provider (ASPSP) under PSD2, TSB participates
  in UK Open Banking and publishes its APIs conformant to the Open Banking Implementation Entity (OBIE) standards through
  a public developer portal at apis.developer.tsb.co.uk. TSB is not one of the nine CMA-mandated banks (CMA9) but implements
  the same OBIE Open Data and Read/Write API family: unauthenticated Open Data reference APIs plus FAPI-secured Account and
  Transaction Information (AIS), Payment Initiation (PIS), and Confirmation of Funds (CBPII) services secured with OAuth2/OIDC,
  mutual-TLS, and PSD2 strong customer authentication.'
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
- FAPI
- Fintech
created: '2026-07-23'
modified: '2026-07-23'
specificationVersion: '0.19'
apis:
- aid: tsb-bank:tsb-open-data-api
  name: TSB Open Data API
  description: TSB's public, unauthenticated Open Data API conformant to the OBIE Open Data API Standard, exposing reference
    data for ATMs, branches, personal current accounts, business current accounts, unsecured SME loans, and commercial credit
    cards. No live TSB Open Data endpoint was confirmed at review time; the harvested OpenAPI is the shared OBIE Open Data
    standard, not a TSB proprietary contract.
  humanURL: https://www.tsb.co.uk/help-and-support/open-banking/
  baseURL: https://apis.tsb.co.uk
  tags:
  - Open Data
  - ATMs
  - Branches
  - Reference Data
  properties:
  - type: OpenAPI
    url: openapi/obie-open-data-openapi.json
  - type: Documentation
    url: https://www.tsb.co.uk/help-and-support/open-banking/
  - type: APIReference
    url: https://openbankinguk.github.io/opendata-api-docs-pub/v2.4.0/
- aid: tsb-bank:tsb-account-transaction-information-api
  name: TSB Account and Transaction Information API (AIS)
  description: TSB's OBIE Read/Write Account and Transaction Information (AIS) API, providing authorised third-party providers
    read access to account, balance, transaction, beneficiary, standing order, direct debit, and statement data. FAPI-secured
    with OAuth2/OIDC, mutual-TLS, and PSD2 strong customer authentication; access requires developer-portal onboarding with
    OBIE/eIDAS certificates.
  humanURL: https://apis.developer.tsb.co.uk/
  baseURL: https://apis.tsb.co.uk
  tags:
  - Account Information
  - AIS
  - Open Banking
  properties:
  - type: Documentation
    url: https://apis.developer.tsb.co.uk/
  - type: APIReference
    url: https://github.com/OpenBankingUK/read-write-api-specs
- aid: tsb-bank:tsb-payment-initiation-api
  name: TSB Payment Initiation API (PIS)
  description: TSB's OBIE Read/Write Payment Initiation (PIS) API, enabling authorised third-party providers to initiate domestic
    and scheduled payments and standing orders on behalf of consenting customers. FAPI-secured with OAuth2/OIDC, mutual-TLS,
    and PSD2 strong customer authentication; access requires developer-portal onboarding with OBIE/eIDAS certificates.
  humanURL: https://apis.developer.tsb.co.uk/
  baseURL: https://apis.tsb.co.uk
  tags:
  - Payment Initiation
  - PIS
  - Payments
  properties:
  - type: Documentation
    url: https://apis.developer.tsb.co.uk/
  - type: APIReference
    url: https://github.com/OpenBankingUK/read-write-api-specs
- aid: tsb-bank:tsb-confirmation-of-funds-api
  name: TSB Confirmation of Funds API (CBPII)
  description: TSB's OBIE Read/Write Confirmation of Funds (CBPII) API, allowing authorised card-based payment instrument
    issuers to confirm whether funds are available on a customer account. FAPI-secured with OAuth2/OIDC, mutual-TLS, and PSD2
    strong customer authentication; access requires developer-portal onboarding with OBIE/eIDAS certificates.
  humanURL: https://apis.developer.tsb.co.uk/
  baseURL: https://apis.tsb.co.uk
  tags:
  - Confirmation of Funds
  - CBPII
  - Open Banking
  properties:
  - type: Documentation
    url: https://apis.developer.tsb.co.uk/
  - type: APIReference
    url: https://github.com/OpenBankingUK/read-write-api-specs
- aid: tsb-bank:tsb-oauth-toolkit-server
  name: TSB OAuth Toolkit (OTK) Server
  description: TSB's OpenID Connect / OAuth2 authorization server (Curity OAuth Toolkit, OTK Server APIs v4.3.1), backing
    the FAPI-secured OBIE Read/Write services. Exposes the authorize, token, token-revocation, userinfo, JWKS, session, and
    OIDC dynamic-client-registration endpoints. The OpenAPI 3.0.2 contract and the OpenID Provider discovery document are
    publicly served at apis.tsb.co.uk; token issuance and protected operations require client credentials and (for account/payment
    APIs) mutual-TLS with OBIE/eIDAS certificates.
  humanURL: https://apis.developer.tsb.co.uk/
  baseURL: https://apis.tsb.co.uk
  tags:
  - OAuth
  - OpenID Connect
  - Identity
  - FAPI
  properties:
  - type: OpenAPI
    url: openapi/tsb-bank-oauth-server-openapi.json
  - type: Overlay
    url: overlays/tsb-bank-oauth-server-overlay.yaml
  - type: Documentation
    url: https://apis.tsb.co.uk/.well-known/openid-configuration
  - type: OpenIDConnect
    url: https://apis.tsb.co.uk/.well-known/openid-configuration
common:
- type: Overlay
  url: overlays/tsb-bank-obie-open-data-overlay.yaml
- type: WellKnown
  url: well-known/tsb-bank-well-known.yml
- type: SecurityTxt
  url: well-known/tsb-bank-security.txt
- type: Conformance
  url: conformance/tsb-bank-conformance.yml
- type: Lifecycle
  url: lifecycle/tsb-bank-lifecycle.yml
- type: Conventions
  url: conventions/tsb-bank-conventions.yml
- type: Idempotency
  url: conventions/tsb-bank-conventions.yml
- type: ErrorCatalog
  url: errors/tsb-bank-problem-types.yml
- type: DataModel
  url: data-model/tsb-bank-data-model.yml
- type: MCPServer
  url: mcp/tsb-bank-mcp.yml
- type: ToolCrosswalk
  url: mcp/tsb-bank-tool-crosswalk.yml
- type: LLMsTxt
  url: llms/tsb-bank-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Security
  url: https://www.tsb.co.uk/.well-known/security.txt
- type: AgenticAccess
  url: agentic-access/tsb-bank-agentic-access.yml
- type: OAuthScopes
  url: scopes/tsb-bank-scopes.yml
- type: Authentication
  url: authentication/tsb-bank-authentication.yml
- type: VulnerabilityDisclosure
  url: security/tsb-bank-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/tsb-bank-domain-security.yml
- type: Website
  url: https://www.tsb.co.uk/
- type: DeveloperPortal
  url: https://apis.developer.tsb.co.uk/
- type: Documentation
  url: https://www.tsb.co.uk/help-and-support/open-banking/
- type: LinkedIn
  url: https://www.linkedin.com/company/tsb-bank
- type: TermsOfService
  url: https://www.tsb.co.uk/legal/
- type: PrivacyPolicy
  url: https://www.tsb.co.uk/privacy/
- type: Support
  url: https://www.tsb.co.uk/help-and-support/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com