generated: '2026-07-23'
method: searched
source: https://developers.ybs.co.uk/docs/getting-started
note: >-
  YBS/CBS publish OBIE-style OpenID Provider discovery documents per brand (ybs,
  che) on production (api.ybs.co.uk) and sandbox (sandbox.ybs.co.uk). The OBIE
  Read/Write resource hosts (ob-ybs.api.ybs.co.uk / ob-che.api.ybs.co.uk) are
  mutual-TLS gated and return no anonymous /.well-known/ documents. No
  /.well-known/security.txt or /.well-known/api-catalog is published on the
  developer portal or corporate site.
hosts:
- host: https://api.ybs.co.uk
  documents:
  - path: /open-banking/v1.0/.well-known/ybs/openid-configuration
    status: 200
    file: yorkshire-building-society-ybs-openid-configuration.json
    brand: Yorkshire Building Society
    issuer: https://ob-ybs.api.ybs.co.uk
  - path: /open-banking/v1.0/.well-known/che/openid-configuration
    status: 200
    file: yorkshire-building-society-che-openid-configuration.json
    brand: Chelsea Building Society
    issuer: https://ob-che.api.ybs.co.uk
- host: https://sandbox.ybs.co.uk
  documents:
  - path: /open-banking/v1.0/.well-known/ybs/openid-configuration
    status: 200
    file: yorkshire-building-society-sandbox-ybs-openid-configuration.json
    brand: Yorkshire Building Society (sandbox)
    issuer: https://ob-ybs.sandbox.ybs.co.uk
misses:
- {host: https://developers.ybs.co.uk, path: /.well-known/security.txt, status: 404}
- {host: https://www.ybs.co.uk, path: /.well-known/security.txt, status: 404}
- {host: https://developers.ybs.co.uk, path: /.well-known/api-catalog, status: 404}
- {host: 'https://ob-ybs.api.ybs.co.uk', path: /.well-known/openid-configuration, status: 000, note: mutual-TLS gated / no anonymous response}