East West Bank Authentication

generated: '2026-07-23'
method: searched
source: https://apiportal.eastwestbank.com/faqs
docs: https://apiportal.eastwestbank.com/how-it-works
note: >-
  No OpenAPI/Swagger is publicly downloadable for the Bridge Open Banking program
  (reference and specs are gated behind portal sign-in and sales onboarding), so this
  profile is captured from the developer portal's public How It Works and FAQ pages
  rather than derived from a securityScheme. It reflects what the provider documents.
summary:
  types:
  - oauth2
  oauth2_flows:
  - clientCredentials
  api_key_in: []
schemes:
- name: OAuth2
  type: oauth2
  scheme: standard OAuth 2.0
  sources:
  - https://apiportal.eastwestbank.com/faqs
  flows:
  - flow: clientCredentials
    note: >-
      Developers create an "application" (a collection of one or more API resources
      accessible with a single authentication credential) to obtain a client id and
      secret. The portal FAQ documents base-64 encoding the client and secret, then
      exchanging them for an access token that is presented on API calls.
  credentials:
    client_id: issued per application on application creation
    client_secret: issued per application on application creation
    encoding: >-
      base-64 encode the client id and secret in-application (the FAQ recommends
      encoding in application logic rather than storing a static encoded string)
    access_token: >-
      short-lived bearer access token obtained from the credentials; requests fail
      with HTTP 401 when the client id/secret do not match the created application or
      when the access token is invalidated or expired
troubleshooting:
- status: 401
  causes:
  - client-id and secret not correctly matched against the created application
  - access token invalidated or expired