# Sandbox testing

Use the sandbox environment to validate request construction, user journeys, callbacks, and operational handling before going live.

## Use the correct environment

Sandbox requests use https://sandbox.moolre.com. SMS and WhatsApp each use a separate service-specific X-API-VASKEY, so enter the key created for the service you are calling.

## Test real integration paths

Cover success, validation failure, duplicate reference, callback delivery, and uncertain network outcomes. Record the request reference in your test notes so every case can be investigated.