generated: '2026-07-18'
method: searched
source: https://help.leminnow.com/knowledge/verifying-a-lemin-captcha-answer
docs: https://help.leminnow.com/knowledge/developers-guide
description: >-
  Lemin Captcha uses a two-key model. A public captcha_id (site key) identifies
  a configured captcha to the browser widget and is safe to expose client-side.
  A secret private_key authenticates the server-side verification call and must
  never be sent from the browser. The private_key is supplied in the JSON body
  of the verification request (not as an HTTP header), so it is not expressed as
  a standard OpenAPI securityScheme; the OpenAPI models it as a required request
  field. There is no OAuth surface.
summary:
  types: [apiKey]
  api_key_in: [body]
  oauth2_flows: []
schemes:
- name: private_key
  type: apiKey
  in: body
  parameter: private_key
  role: server-side secret verification key (account key from the Lemin Dashboard)
  scope: server-to-server only
  sources: [https://help.leminnow.com/knowledge/verifying-a-lemin-captcha-answer]
- name: captcha_id
  type: apiKey
  in: client
  parameter: captcha_id
  role: public site key identifying the captcha to the browser widget
  scope: client-side, non-secret
  sources: [https://help.leminnow.com/knowledge/displaying-lemin-captcha]