generated: '2026-09-06'
method: searched
source: openapi/acall-public-api-openapi.yml
docs: https://support.workstyleos.com/faq/show/598?site_domain=default
summary:
  types:
  - http
  api_key_in: []
  oauth2_flows: []
schemes:
- name: Bearer
  type: http
  scheme: bearer
  description: Access token for API
  sources:
  - openapi/acall-public-api-openapi.yml
  applied: global
  note: >-
    Declared as a document-level security requirement (security: [{Bearer: []}]) in the Acall Public API
    spec, so it applies to all 13 operations.
credential_issuance:
  self_serve: false
  process: >-
    Acall does not issue API tokens through a developer console. The published help-centre article
    "利用できる API を教えてください" (FAQ 598) instructs customers to submit the contact form with
    「API利用希望」 (request to use the API) in the body; Acall reviews the request and then issues an
    access token by reply.
  request_url: https://support.workstyleos.com/faq/show/1250?site_domain=default
  restrictions:
  - >-
    The API is not available to customers on the multi-tenant (マルチテナント) plan — stated verbatim in
    FAQ 598 under ご利用条件.
  source: https://support.workstyleos.com/faq/show/598?site_domain=default
observed_challenge:
  probed: '2026-09-06'
  note: >-
    Live unauthenticated probes of the production base URL return an RFC 6750 bearer challenge. Bodies are
    text/plain, not JSON.
  probes:
  - url: https://api.workstyleos.com/v1/users
    request: no Authorization header
    status: 401
    www_authenticate: Bearer realm="token_required"
    body: Unauthenticated
  - url: https://api.workstyleos.com/v1/users
    request: "Authorization: Bearer <invalid>"
    status: 401
    www_authenticate: Bearer error="invalid_token"
    body: Unauthenticated
  - url: https://api.workstyleos.com/v1/nope
    request: no Authorization header
    status: 404
    www_authenticate: Bearer error="not_found"
    body: Not found endpoint
sso:
  note: >-
    Distinct from API authentication: the Acall Portal end-user product supports SAML/OIDC single sign-on
    (Microsoft Entra ID / Azure AD and others) as a paid option, and since the 2026-07-09 release supports
    multiple simultaneous IdPs. This governs human login to portal.workstyleos.com, not Public API tokens.
  source: https://www.workstyleos.com/security/