Finix Payments · Authentication Profile

Finix Payments Authentication

Authentication

Finix Payments secures its APIs with http across 1 declared security scheme, as derived from its OpenAPI definitions.

CompanyPaymentsPayment ProcessingPayment FacilitationEmbedded FinanceMarketplacesACHCard AcceptanceFintechPCI DSS
Methods: http Schemes: 1 OAuth flows: API key in:

Security Schemes

BasicAuth http
scheme: basic

Source

Authentication Profile

Raw ↑ 
generated: '2026-07-19'
method: searched
source: openapi/finix-payments-openapi-original.yml
docs: https://docs.finix.com/additional-resources/developers/authentication-and-api-basics/api-keys
detail: >-
  Finix authenticates every request with HTTP Basic Authentication (RFC 7617). The username is the API Key
  id (e.g. USxxxxxxxx) and the password is the API Key secret; combine as "username:password", Base64-encode,
  and send as Authorization: Basic <base64>. API Keys are created in the Finix Dashboard and are environment
  scoped — Sandbox keys cannot be used in Live and vice-versa. There is no OAuth2/OIDC surface.
summary:
  types:
  - http
  http_schemes:
  - basic
schemes:
- name: BasicAuth
  type: http
  scheme: basic
  sources:
  - openapi/finix-payments-openapi-original.yml