Yubico · Authentication Profile

Yubico Authentication

Authentication

Yubico secures its APIs with apiKey and hmac-signature across 2 declared security schemes, as derived from its OpenAPI definitions.

CompanyEnterpriseAuthenticationSecurityIdentityHardware SecurityFIDO2WebAuthnOne-Time Password
Methods: apiKey, hmac-signature Schemes: 2 OAuth flows: API key in: query

Security Schemes

clientId apiKey
· in: query (id)
requestSignature hmac
· in: query (h)

Source

Authentication Profile

Raw ↑ 
generated: '2026-07-21'
method: searched
source: https://developers.yubico.com/OTP/Specifications/OTP_validation_protocol.html
summary:
  types: [apiKey, hmac-signature]
  api_key_in: [query]
  oauth2_flows: []
schemes:
  - name: clientId
    type: apiKey
    in: query
    parameter: id
    description: >-
      Numeric Client ID issued free by the Yubico API key generator
      (https://upgrade.yubico.com/getapikey/).
    sources: [openapi/yubico-yubicloud-openapi.yml]
  - name: requestSignature
    type: hmac
    algorithm: HMAC-SHA1
    in: query
    parameter: h
    description: >-
      Base64 HMAC-SHA1 signature of the sorted request parameters, computed with
      the shared secret issued alongside the Client ID. Clients must also verify
      the signature on the response.
    sources: [https://developers.yubico.com/OTP/Specifications/OTP_validation_protocol.html]
docs: https://developers.yubico.com/OTP/Specifications/OTP_validation_protocol.html