# Santander UK

**Canonical:** https://apis.io/providers/santander-uk/  
**Website:** https://www.santander.co.uk/  
**APIs profiled:** 4

Santander UK plc is a major British retail and commercial bank and one of the CMA9 banks mandated to deliver UK Open Banking. It is a wholly owned, ring-fenced subsidiary of Banco Santander S.A. of Madrid, Spain, and was formed from the former Abbey National, Alliance & Leicester, and the savings business of Bradford & Bingley. Operating from Milton Keynes with a registered office in London, it serves around 14 million active personal, business, and corporate customers. Santander UK is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the PRA. Under PSD2 and the CMA Order it publishes a developer portal ("Santander Developers") exposing free, unauthenticated Open Data APIs (ATMs, branches, and product reference data) plus the OBIE Read/Write API family - Account & Transaction Information (AIS), Payment Initiation (PIS), and Confirmation of Funds (CBPII) - conformant to the Open Banking Implementation Entity standard and secured with FAPI-grade OAuth2/OIDC, mutual-TLS client authentication, and PSD2 strong customer authentication.

## Kin Score — 41.1 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 41.1).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 51.2 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 15.8 |
| Developer Ergonomics | 36.3 |
| Commercial Clarity | 10.5 |
| Access Clarity | 10.5 |

Regulatory layer — **Banking & Open Finance**: 75.9 (matched via tags).

## Agent readiness — 40.4 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | documented |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | verified |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (4)

- **Santander UK Open Data API** — Free, public, unauthenticated Open Data reference API publishing Santander UK ATMs, branches, and product information (personal & business current accounts, unsecured SME loans,...
- **Santander UK Account & Transaction Information API** — OBIE Read/Write Account and Transaction Information (AIS) API for accessing account, balance, transaction, and party data with customer consent. FAPI-secured (OAuth2/OIDC, mTLS,...
- **Santander UK Payment Initiation API** — OBIE Read/Write Payment Initiation (PIS) API for initiating domestic, scheduled, standing-order, international, and file payments on behalf of customers. FAPI-secured (OAuth2/OI...
- **Santander UK Confirmation of Funds API** — OBIE Read/Write Confirmation of Funds (CBPII) API allowing an authorised card-based payment instrument issuer to confirm the availability of funds on a customer account. FAPI-se...

## MCP servers (1)

- **Santander UK MCP Server**

## Agentic access (1)

- **Santander Uk Agentic Access** — 86 operations · 20 acting

## Security (2)

- **Santander Uk Authentication** — oauth2 · 2 schemes
- **Santander Uk Domain Security** — TLSv1.3 · DMARC

## Tags

Financial-Services, Banking, Open Banking, PSD2, OBIE, CMA9, United Kingdom, Payments, Account Information, FAPI

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/santander-uk/). Scores are computed from the provider's own public artifacts under a published rubric.