generated: '2026-07-18'
method: searched
source: openapi/arthur-ai-platform-openapi.json
docs: https://docs.arthur.ai/docs/authentication.md
note: >-
  Arthur uses two distinct auth mechanisms. The Arthur Platform API uses OAuth2
  via Keycloak (issuer https://platform-auth.arthur.ai/realms/arthur): human
  flows use device authorization, machine-to-machine uses service-account client
  credentials (tokens auto-refreshed with a 30s leeway). The self-hosted Arthur
  Engine / Agent Toolkit uses API keys instead.
summary:
  types:
    - oauth2
    - apiKey
  oauth2_flows:
    - authorizationCode
    - deviceAuthorization
    - clientCredentials
  api_key_scope: Arthur Engine / Agent Toolkit only
schemes:
  - name: OAuth2AuthorizationCode
    type: oauth2
    component: Arthur Platform
    flows:
      - flow: authorizationCode
        authorizationUrl: https://platform-auth.arthur.ai/realms/arthur/protocol/openid-connect/auth
        tokenUrl: https://platform-auth.arthur.ai/realms/arthur/protocol/openid-connect/token
        refreshUrl: https://platform-auth.arthur.ai/realms/arthur/protocol/openid-connect/token
    sources:
      - openapi/arthur-ai-platform-openapi.json
  - name: ClientCredentials
    type: oauth2
    component: Arthur Platform (service accounts, M2M)
    flows:
      - flow: clientCredentials
        tokenUrl: https://platform-auth.arthur.ai/realms/arthur/protocol/openid-connect/token
    sources:
      - https://docs.arthur.ai/docs/authentication.md
  - name: DeviceAuthorization
    type: oauth2
    component: Arthur Platform (human local flows)
    flows:
      - flow: deviceCode
        tokenUrl: https://platform-auth.arthur.ai/realms/arthur/protocol/openid-connect/token
    sources:
      - https://docs.arthur.ai/docs/authentication.md
  - name: ApiKey
    type: apiKey
    in: header
    component: Arthur Engine / Agent Toolkit
    sources:
      - https://docs.arthur.ai/docs/authentication.md