Klaviyo · Authentication Profile

Klaviyo Authentication

Authentication

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

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

Security Schemes

Klaviyo-API-Key apiKey
· in: header (Authorization)

Source

Authentication Profile

Raw ↑ 
generated: '2026-07-11'
method: derived
source: openapi/klaviyo-openapi.json
summary:
  types:
  - apiKey
  api_key_in:
  - header
schemes:
- name: Klaviyo-API-Key
  type: apiKey
  in: header
  parameter: Authorization
  description: Private key authentication for /api/ endpoints is performed by setting the `Authorization`
    header to `Klaviyo-API-Key your-private-api-key`<br>For more information please visit https://developers.klaviyo.com/en/v2026-04-15/reference/api-overview#authentication
  sources:
  - openapi/klaviyo-openapi.json