Sync vs. Async Mode - Strails API

By default, sandbox endpoints respond synchronously with a completed status. To simulate asynchronous processing and receive a webhook callback, use one of the following methods.

Option 1: Query Parameter

Append ?mockMode=async to the request URL:

POST https://sandbox.stablesrail.io/v1/onboarduser?mockMode=async

Option 2: HTTP Header

Send the x-mock-mode: async header:

POST https://sandbox.stablesrail.io/v1/onboarduser
x-mock-mode: async

The query parameter takes precedence over the header. If neither is provided, the request defaults to sync mode.

Async Response Example

{
  "status": "success",
  "response_code": "00",
  "message": "SUCCESS",
  "data": {
    "requestId": "req-s-a1b2c3d4e5f6g7h8i9j0",
    "status": "processing",
    "userHash": "usr-s-...",
    "message": "User registration request has been submitted for processing",
    "estimatedCompletionTime": "2-5 minutes"
  }
}

A webhook event is scheduled after a short delay (default ~3 seconds) to the configured webhook URL.

​Option 1: Query Parameter

​Option 2: HTTP Header

​Async Response Example

Option 1: Query Parameter

Option 2: HTTP Header

Async Response Example