Sandbox on Solana devnet. No real funds move here. Use sk_test_ keys and a wallet set to devnet. Get devnet SOL from the Solana faucet and devnet USDC from the Circle faucet.
SolKnife GatewayRegister app

Payment console

Create a crypto checkout

A developer console for testing checkouts. Enter a Gateway API key to create a hosted checkout, as your server does in production. Include the amount, the customer's Telegram chat id, and the payment token when needed.

Developer tool. The API key you enter stays in this tab's memory and is sent only to the Gateway API. Do not use the console on a shared machine. Your production app keeps the key on its server.

Use business default unless the app has added another accepted crypto token.

Guide: get Telegram chat ID
  1. Open Telegram and start @solknife_sandbox_bot.
  2. Press Start or send /start from the Telegram account that should receive updates.
  3. The bot replies with the numeric chat ID of that account. Copy it.
  4. Paste the customer's chat ID here so they receive checkout and subscription updates.