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

# Initiate 3rd party authentication flow

## Endpoints

<Card title="Outgoing webhook endpoint to initiate 3rd party authentication flow" icon="arrow-right" href="/payment/api/initiate-3rd-party-authentication-flow/outgoing-webhook-endpoint-to-initiate-3rd-party-authentication-flow" horizontal>
  **POST** /v1/authenticate/\{customerNumber}/\{sessionId}
</Card>