Starling Bank

Starling Bank is a UK app-only digital challenger bank founded in 2014 by Anne Boden and headquartered in London, holding a full UK banking licence and authorised and regulated by the Prudential Regulation Authority and the Financial Conduct Authority (FSCS-protected, SWIFT SRLGGB2L). It is a privately held company - not a mutual and not publicly listed - backed by investors including Goldman Sachs, Fidelity, and the Qatar Investment Authority, and it also licenses its core banking platform as Software-as-a-Service under the "Engine by Starling" brand. As an FCA-authorised ASPSP it participates in UK Open Banking / PSD2, but Starling is best known for its own developer-friendly, bespoke RESTful Developer API (accounts, transaction feed, payments, payees, savings goals/spaces, cards, mandates, and identity) served over OAuth2 at api.starlingbank.com with a full sandbox, alongside its Open Banking Read/Write (AIS, PIS, CBPII) conformance to the Open Banking Implementation Entity (OBIE) standard secured with FAPI-grade OAuth2/OIDC, mutual-TLS, and PSD2 strong customer authentication. Starling is a challenger bank and is not one of the nine CMA9 mandated banks.

Starling Bank publishes 1 API on the APIs.io network: Starling Open Data API (OBIE Standard). Tagged areas include Financial Services, Banking, Open Banking, PSD2, and OBIE.

Starling Bank’s developer surface includes authentication, sandbox, API reference, documentation, getting-started guide, engineering blog, support, and 23 more developer resources.

47.7/100 developing ▬ flat Agent 50/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessFreeSelf serveFree trial
13 APIs
Financial ServicesBankingOpen BankingPSD2OBIEUnited KingdomPaymentsAccount InformationChallenger BankFintechFAPI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 47.7/100 · developing
Contract Quality 9.4 / 25
Developer Ergonomics 13.0 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 50/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 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 0 / 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/starling-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 13

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

Starling Accounts API

Bespoke Starling Developer API for retrieving a customer's accounts, account identifiers (sort code / account number), and balances. Served over OAuth2 at the api.starlingbank.c...

Starling Account Holder API

Returns account-holder profile information - the type of account holder (individual, business, joint, sole trader), name, and registered details - from the Starling bespoke Deve...

Starling Transaction Feed API

The Starling transaction feed (feed items) API exposes real-time transaction activity, feed-item detail, spending categories, receipts, and attachments for an account over the b...

Starling Payments API

Initiate and manage domestic and scheduled payments, payment orders, and standing orders from a Starling account through the bespoke Developer API, secured with OAuth2 and payme...

Starling Payees API

Create, list, and manage payees (beneficiaries) and payee accounts used when initiating payments from a Starling account via the bespoke Developer API.

Starling Savings Goals API

Create and manage Savings Goals (Spaces), add or withdraw money, and round-up transfers within a Starling account through the bespoke Developer API.

Starling Cards API

Retrieve card details and control card settings - enabling or disabling the card and per-feature controls (ATM, online, mobile wallet, magstripe, gambling) - via the Starling be...

Starling Mandates API

List and cancel direct debit mandates on a Starling account through the bespoke Developer API.

Starling Identity API

Returns the identity and token/authorising-individual context for the authenticated Starling user, including the scopes granted to the access token, via the bespoke Developer API.

Starling Open Data API (OBIE Standard)

UK Open Banking Open Data API - PUBLIC, unauthenticated reference data (personal and business current accounts, and, for banks with a physical estate, ATMs and branches) modelle...

Starling Account and Transaction Information API (AIS, OBIE Read/Write)

UK Open Banking Read/Write Account and Transaction Information (AIS) API for accessing account, balance, transaction, and product data as an FCA-authorised ASPSP, conformant to ...

Starling Payment Initiation API (PIS, OBIE Read/Write)

UK Open Banking Read/Write Payment Initiation (PIS) API for initiating domestic and other payments as an FCA-authorised ASPSP, conformant to the OBIE Read/Write standard and sec...

Starling Confirmation of Funds API (CBPII, OBIE Read/Write)

UK Open Banking Read/Write Confirmation of Funds (CBPII) API allowing a card-based payment instrument issuer to confirm whether funds are available, as an FCA-authorised ASPSP, ...

Scroll for all 13

Security Posture 3

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

Starling Bank Authentication

oauth2/http · 3 schemes

SECURITY

Starling Bank Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Starling Bank Vulnerability Disclosure

Hackerone · security.txt · contact published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Build 3

SDKs, sample code, and the tooling you integrate with

Access & Security 6

Authentication, authorization, and security posture

Operate 2

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: starling-bank
url: https://raw.githubusercontent.com/api-evangelist/starling-bank/refs/heads/main/apis.yml
name: Starling Bank
kind: company
description: Starling Bank is a UK app-only digital challenger bank founded in 2014 by Anne Boden and headquartered in London,
  holding a full UK banking licence and authorised and regulated by the Prudential Regulation Authority and the Financial
  Conduct Authority (FSCS-protected, SWIFT SRLGGB2L). It is a privately held company - not a mutual and not publicly listed
  - backed by investors including Goldman Sachs, Fidelity, and the Qatar Investment Authority, and it also licenses its core
  banking platform as Software-as-a-Service under the "Engine by Starling" brand. As an FCA-authorised ASPSP it participates
  in UK Open Banking / PSD2, but Starling is best known for its own developer-friendly, bespoke RESTful Developer API (accounts,
  transaction feed, payments, payees, savings goals/spaces, cards, mandates, and identity) served over OAuth2 at api.starlingbank.com
  with a full sandbox, alongside its Open Banking Read/Write (AIS, PIS, CBPII) conformance to the Open Banking Implementation
  Entity (OBIE) standard secured with FAPI-grade OAuth2/OIDC, mutual-TLS, and PSD2 strong customer authentication. Starling
  is a challenger bank and is not one of the nine CMA9 mandated banks.
accessModel:
  pricing: free
  onboarding: self-serve
  trial: true
  try_now: false
  public: false
  label: Free · Self-serve developer signup with sandbox
  confidence: high
  source:
  - authentication
  - documentation
  generated: '2026-07-23'
  method: derived
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
- Challenger Bank
- Fintech
- FAPI
created: '2026-07-23'
modified: '2026-07-23'
specificationVersion: '0.19'
apis:
- aid: starling-bank:starling-accounts-api
  name: Starling Accounts API
  description: Bespoke Starling Developer API for retrieving a customer's accounts, account identifiers (sort code / account
    number), and balances. Served over OAuth2 at the api.starlingbank.com/api/v2 host with a full sandbox at api-sandbox.starlingbank.com.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Accounts
  - Balances
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
  - type: Sandbox
    url: https://api-sandbox.starlingbank.com/api/v2
- aid: starling-bank:starling-account-holder-api
  name: Starling Account Holder API
  description: Returns account-holder profile information - the type of account holder (individual, business, joint, sole
    trader), name, and registered details - from the Starling bespoke Developer API.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Account Holder
  - Identity
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
- aid: starling-bank:starling-transaction-feed-api
  name: Starling Transaction Feed API
  description: The Starling transaction feed (feed items) API exposes real-time transaction activity, feed-item detail, spending
    categories, receipts, and attachments for an account over the bespoke Developer API.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Transactions
  - Feed Items
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
- aid: starling-bank:starling-payments-api
  name: Starling Payments API
  description: Initiate and manage domestic and scheduled payments, payment orders, and standing orders from a Starling account
    through the bespoke Developer API, secured with OAuth2 and payment scopes.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Payments
  - Standing Orders
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
- aid: starling-bank:starling-payees-api
  name: Starling Payees API
  description: Create, list, and manage payees (beneficiaries) and payee accounts used when initiating payments from a Starling
    account via the bespoke Developer API.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Payees
  - Beneficiaries
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
- aid: starling-bank:starling-savings-goals-api
  name: Starling Savings Goals API
  description: Create and manage Savings Goals (Spaces), add or withdraw money, and round-up transfers within a Starling account
    through the bespoke Developer API.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Savings Goals
  - Spaces
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
- aid: starling-bank:starling-cards-api
  name: Starling Cards API
  description: Retrieve card details and control card settings - enabling or disabling the card and per-feature controls (ATM,
    online, mobile wallet, magstripe, gambling) - via the Starling bespoke Developer API.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Cards
  - Card Controls
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
- aid: starling-bank:starling-mandates-api
  name: Starling Mandates API
  description: List and cancel direct debit mandates on a Starling account through the bespoke Developer API.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Mandates
  - Direct Debits
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
- aid: starling-bank:starling-identity-api
  name: Starling Identity API
  description: Returns the identity and token/authorising-individual context for the authenticated Starling user, including
    the scopes granted to the access token, via the bespoke Developer API.
  humanURL: https://developer.starlingbank.com/docs
  baseURL: https://api.starlingbank.com/api/v2
  tags:
  - Identity
  - OAuth
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs
  - type: APIReference
    url: https://developer.starlingbank.com/docs
- aid: starling-bank:starling-open-data-api
  name: Starling Open Data API (OBIE Standard)
  description: UK Open Banking Open Data API - PUBLIC, unauthenticated reference data (personal and business current accounts,
    and, for banks with a physical estate, ATMs and branches) modelled on the OBIE Open Data standard. Starling is an app-only
    bank with no branches or ATM estate; no live Open Data endpoint was confirmed for Starling during this review, so the
    harvested specification is the shared OBIE standard, not a Starling contract.
  humanURL: https://developer.starlingbank.com/docs/open-banking
  baseURL: https://api.starlingbank.com/open-banking
  tags:
  - Open Data
  - Reference Data
  properties:
  - type: OpenAPI
    url: openapi/obie-opendata-swagger.json
  - type: Documentation
    url: https://developer.starlingbank.com/docs/open-banking
  - type: APIReference
    url: https://github.com/OpenBankingUK/opendata-api-spec-compiled
- aid: starling-bank:starling-account-transaction-api
  name: Starling Account and Transaction Information API (AIS, OBIE Read/Write)
  description: UK Open Banking Read/Write Account and Transaction Information (AIS) API for accessing account, balance, transaction,
    and product data as an FCA-authorised ASPSP, conformant to the OBIE Read/Write standard and secured with FAPI OAuth2/OIDC,
    mutual-TLS, and PSD2 strong customer authentication. Base path shown is the OBIE standard shape and was not publicly confirmed
    for Starling.
  humanURL: https://developer.starlingbank.com/docs/open-banking
  baseURL: https://api.starlingbank.com/open-banking/v3.1/aisp
  tags:
  - Account Information
  - AIS
  - Open Banking
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs/open-banking
  - type: APIReference
    url: https://github.com/OpenBankingUK/read-write-api-specs
- aid: starling-bank:starling-payment-initiation-api
  name: Starling Payment Initiation API (PIS, OBIE Read/Write)
  description: UK Open Banking Read/Write Payment Initiation (PIS) API for initiating domestic and other payments as an FCA-authorised
    ASPSP, conformant to the OBIE Read/Write standard and secured with FAPI OAuth2/OIDC, mutual-TLS, and PSD2 strong customer
    authentication. Base path shown is the OBIE standard shape and was not publicly confirmed for Starling.
  humanURL: https://developer.starlingbank.com/docs/open-banking
  baseURL: https://api.starlingbank.com/open-banking/v3.1/pisp
  tags:
  - Payment Initiation
  - PIS
  - Open Banking
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs/open-banking
  - type: APIReference
    url: https://github.com/OpenBankingUK/read-write-api-specs
- aid: starling-bank:starling-confirmation-of-funds-api
  name: Starling Confirmation of Funds API (CBPII, OBIE Read/Write)
  description: UK Open Banking Read/Write Confirmation of Funds (CBPII) API allowing a card-based payment instrument issuer
    to confirm whether funds are available, as an FCA-authorised ASPSP, conformant to the OBIE Read/Write standard and secured
    with FAPI OAuth2/OIDC, mutual-TLS, and PSD2 strong customer authentication. Base path shown is the OBIE standard shape
    and was not publicly confirmed for Starling.
  humanURL: https://developer.starlingbank.com/docs/open-banking
  baseURL: https://api.starlingbank.com/open-banking/v3.1/cbpii
  tags:
  - Confirmation of Funds
  - CBPII
  - Open Banking
  properties:
  - type: Documentation
    url: https://developer.starlingbank.com/docs/open-banking
  - type: APIReference
    url: https://github.com/OpenBankingUK/read-write-api-specs
common:
- type: VulnerabilityDisclosure
  url: security/starling-bank-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/starling-bank-domain-security.yml
- type: Security
  url: https://www.starlingbank.com/security/disclosure/
- type: Authentication
  url: authentication/starling-bank-authentication.yml
- type: Packages
  url: packages/starling-bank-packages.yml
- type: SDKs
  url: packages/starling-bank-packages.yml
- type: WellKnown
  url: well-known/starling-bank-well-known.yml
- type: SecurityTxt
  url: well-known/starling-bank-security.txt
- type: Conformance
  url: conformance/starling-bank-conformance.yml
- type: Lifecycle
  url: lifecycle/starling-bank-lifecycle.yml
- type: Conventions
  url: conventions/starling-bank-conventions.yml
- type: Idempotency
  url: conventions/starling-bank-conventions.yml
- type: ErrorCatalog
  url: errors/starling-bank-problem-types.yml
- type: Sandbox
  url: sandbox/starling-bank-sandbox.yml
- type: LLMsTxt
  url: llms/starling-bank-llms.txt
- type: Overlay
  url: overlays/starling-bank-opendata-overlay.yaml
- type: APIReference
  url: https://developer.starlingbank.com/docs
- type: Website
  url: https://www.starlingbank.com/
- type: DeveloperPortal
  url: https://developer.starlingbank.com/
- type: Documentation
  url: https://developer.starlingbank.com/docs
- type: GettingStarted
  url: https://developer.starlingbank.com/docs/getting-started
- type: OpenBanking
  url: https://developer.starlingbank.com/docs/open-banking
- type: GitHubOrganization
  url: https://github.com/starlingbank
- type: LinkedIn
  url: https://www.linkedin.com/company/starling-bank
- type: Blog
  url: https://www.starlingbank.com/blog/
- type: StatusPage
  url: https://starlingbank.statuspage.io/
- type: Support
  url: https://developer.starlingbank.com/community
- type: Compliance
  url: https://www.starlingbank.com/current-account/service-information/api-performance/
- type: TermsOfService
  url: https://www.starlingbank.com/legal/
- type: PrivacyPolicy
  url: https://www.starlingbank.com/legal/privacy-notice/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com