Bullhorn · Authentication Profile

Bullhorn Authentication

Authentication

Bullhorn secures its APIs with oauth2 and session-token across 2 declared security schemes, as derived from its OpenAPI definitions. OAuth 2.0 is offered via the authorizationCode and refreshToken flow(s).

CompanyStaffingRecruitmentApplicant TrackingATSCRMHuman ResourcesRESTOAuth
Methods: oauth2, session-token Schemes: 2 OAuth flows: authorizationCode, refreshToken API key in:

Security Schemes

OAuth2 oauth2
· flows: authorizationCode
BhRestToken apiKey
scheme: session-token · in: headerquerycookie ()

Source

Authentication Profile

bullhorn-authentication.yml Raw ↑ 
generated: '2026-07-18'
method: searched
source: https://bullhorn.github.io/rest-api-docs/ + live loginInfo discovery
docs: https://bullhorn.github.io/rest-api-docs/
summary:
  types: [oauth2, session-token]
  oauth2_flows: [authorizationCode, refreshToken]
  session_token: BhRestToken
  notes: >-
    Two-stage authentication. Stage 1 is standard OAuth 2.0 (authorization_code
    grant with refresh_token) against the data-center OAuth endpoint. Stage 2
    exchanges the OAuth access_token via the REST /login call for a short-lived
    BhRestToken session token that authenticates all subsequent REST calls.
    Bullhorn OAuth is session/user scoped and does NOT expose granular OAuth
    scopes, so there is no scopes/ artifact.
discovery:
  endpoint: https://rest.bullhornstaffing.com/rest-services/loginInfo?username={API_Username}
  returns: [oauthUrl, restUrl, atsUrl, coreUrl, novoUrl]
  note: Clients must call loginInfo first to resolve the correct data-center (swimlane) oauthUrl and restUrl; a 307 redirect is issued if the wrong data center is used.
schemes:
  - name: OAuth2
    type: oauth2
    flows:
      - flow: authorizationCode
        authorizationUrl: https://auth.bullhornstaffing.com/oauth/authorize
        tokenUrl: https://auth.bullhornstaffing.com/oauth/token
        refresh: true
        note: Host is data-center-specific; resolve via loginInfo oauthUrl. auth.bullhornstaffing.com is the default cluster.
    sources: [https://bullhorn.github.io/rest-api-docs/, live loginInfo]
  - name: BhRestToken
    type: apiKey
    scheme: session-token
    in: [header, query, cookie]
    parameter_name: BhRestToken
    obtained_via: GET https://rest.bullhornstaffing.com/login?access_token={oauth_access_token}&version=*
    validation: GET {corpToken}/ping returns sessionExpires timestamp
    expiry: session expires; refresh on 401; missing token yields 412 Precondition Failed
    sources: [https://bullhorn.github.io/rest-api-docs/]