Register in the App, complete verification, activate MP Card
Check GoPay support on chatgpt.com
Open the ChatGPT subscription page in a browser. If GoPay is listed as a payment method for your account, follow the on-screen instructions. OpenAI Help mentions GoPay support for Go/Plus/Pro in Indonesia.
If you need a card, download MPChat and verify
Download MPChat, sign up, and complete identity verification in the app. The virtual card is issued in the App, not on this site.
Top up MP Wallet with USDC/USDT
In the App, top up MP Wallet with a supported stablecoin (USDC or USDT). At transaction time, supported assets are automatically converted to the local currency.
Activate the virtual card and fill it in on the subscription page
Copy the card number from the App and paste it into the ChatGPT payment form. Don't send card numbers to Telegram groups.