> ## Documentation Index
> Fetch the complete documentation index at: https://docs.alignet.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Server to server notification

> Alignet One sends an HTTP POST notification to the merchant callback with the final authorization result. Validate the signature header with the environment public key using the raw request body.



## OpenAPI

````yaml /openapi-en.json webhook serverToServerNotification
openapi: 3.1.0
info:
  title: Alignet API
  version: 1.0.0
  description: >-
    OpenAPI reference for authentication, authorization, queries, cancellations,
    refunds, and ecommerce payment notifications in PayIn.
servers:
  - url: https://auth.preprod.alignet.io
    description: Pre-production
  - url: https://auth.alignet.io
    description: Production
security: []
paths: {}

````