SMTP2GO · Authentication Profile

Smtp2Go Authentication

Authentication

SMTP2GO secures its APIs with apiKey across 2 declared security schemes, as derived from its OpenAPI definitions.

EmailEmail DeliveryTransactional EmailSMTPSMSEmail APIDeliverability
Methods: apiKey Schemes: 2 OAuth flows: API key in: header

Security Schemes

ApiKeyHeader apiKey
· in: header (X-Smtp2go-Api-Key)
ApiKeyBody apiKey
· in: header (api_key)

Source

Authentication Profile

Raw ↑ 
generated: '2026-07-11'
method: derived
source: openapi/smtp2go-email-api-openapi.yml
summary:
  types:
  - apiKey
  api_key_in:
  - header
schemes:
- name: ApiKeyHeader
  type: apiKey
  in: header
  parameter: X-Smtp2go-Api-Key
  description: API key passed as an HTTP header
  sources:
  - openapi/smtp2go-email-api-openapi.yml
- name: ApiKeyBody
  type: apiKey
  in: header
  parameter: api_key
  description: API key can also be included in the JSON request body as the "api_key" field
  sources:
  - openapi/smtp2go-email-api-openapi.yml