51offer · Authentication Profile

51Offer Authentication

Authentication

51offer secures its APIs with apiKey across 1 declared security scheme, as derived from its OpenAPI definitions.

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Methods: apiKey Schemes: 1 OAuth flows: API key in: header

Security Schemes

tokenHeader apiKey
· in: header (token)

Source

Authentication Profile

Raw ↑ 
generated: '2026-09-05'
method: derived
source: openapi/51offer-horizon-site-openapi.yml
summary:
  types:
  - apiKey
  api_key_in:
  - header
schemes:
- name: tokenHeader
  type: apiKey
  in: header
  parameter: token
  description: 'Session token header. Observed on live responses from https://www.51offer.com:
    Access-Control-Allow-Headers includes "token" and Access-Control-Expose-Headers is "token".
    Unauthenticated calls to public endpoints (e.g. GET /ngGpaCalc/constants) return 200; authenticated
    user endpoints return the envelope with a non-200 code field. 51offer publishes no developer
    auth documentation.'
  sources:
  - openapi/51offer-horizon-site-openapi.yml

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