generated: '2026-07-19'
method: searched
source: https://miniprogram.gcash.com/docs/miniprogram_gcash/mpdev/call_api
docs:
- https://miniprogram.gcash.com/docs/miniprogram_gcash/mpdev/call_api
- https://miniprogram.gcash.com/docs/miniprogram_gcash/mpdev/api_openapi_userauthorization
- https://miniprogram.gcash.com/docs/miniprogram_gcash/mpdev/v2_applytoken
- https://gcash.com/business/api-portal-faqs
summary:
  types: [signature, oauth2]
  model: >-
    GCash Mini Program Open API uses per-request digital-signature
    authentication (asymmetric key pair per partner) plus an OAuth2
    authorization-code style user-authorization flow that mints access tokens
    for user-scoped operations. The partner API Portal issues client
    credentials after subscription approval.
schemes:
- name: RequestSignature
  type: signature
  location: header
  headers:
  - Client-Id
  - Request-Time
  - Signature
  signature:
    algorithms: [RSA256, ECC224]
    default: RSA256
    key_version: keyVersion (defaults to latest key bound to Client-Id)
    request_time_format: ISO 8601, millisecond precision (e.g. 2019-05-28T12:12:12+08:00)
  notes: >-
    Every Open API call is signed. The Signature header is a comma-separated
    key=value string carrying algorithm, keyVersion and the signature value.
    Keys are bound to the partner Client-Id and generated in the API Portal
    "Request Credentials" wizard.
  source: https://miniprogram.gcash.com/docs/miniprogram_gcash/mpdev/call_api
- name: UserAuthorization
  type: oauth2
  flow: authorizationCode
  steps:
  - my.getAuthCode / user authorization consent yields an authCode
  - POST /v{1,2}/authorizations/applyToken exchanges authCode for accessToken
  scopes_documented: [USER_INFO, USER_LOGIN_ID, USER_BASE_INFO]
  notes: >-
    Scopes above are the user-information capability scopes named in the
    mini-program authorization docs; the full scope reference is partner-gated.
  source: https://miniprogram.gcash.com/docs/miniprogram_gcash/mpdev/api_openapi_userauthorization
- name: PortalCredentials
  type: apiKey
  location: partner-portal-issued
  notes: >-
    Partner applications receive credentials via the GCash API Portal after
    subscribing to an API product and being approved. Portal login is
    email-based; production apiportal.gcash.com, sandbox apiportal.lab.gcash.com.
  source: https://gcash.com/business/api-portal-faqs