GMJ Roaming API

The production GMJ Roaming API. Use it to browse eSIM packages, buy eSIMs from your account balance, top up data and manage the eSIMs you own.

• Base URL: https://api.gmjroaming.com/api/v1
• Authenticate every request with your X-API-KEY header.
• Send and accept JSON (Content-Type: application/json, Accept: application/json).

Checkout is synchronous: a 200 means the eSIMs are ready. Top-ups are asynchronous: they return 202 and finish in the background. Use webhooks to get eSIM events instead of polling.

Prices are in USD unless a field says IDR. Some response messages are in Indonesian.