FastAPI on Base

Accept USDT & USDC through FastAPI with settlement on Base. Integrate Zateway with FastAPI. FastAPI async endpoints for payment sessions. Non-custodial USDT & USDC on Polygon, Solana, Base, BSC, Arbitrum, Optimism.

Steps

1. Create a Zateway account and copy your API key.
2. Connect your self-custody wallet address for FastAPI (Base) settlements.
3. Create a payment session via API, plugin, or payment link for FastAPI (Base).
4. Redirect customers to hosted checkout or embed the widget in FastAPI (Base).
5. Verify HMAC-signed webhooks and fulfill the order in FastAPI (Base).
6. Select Base when creating the payment session for lowest surprise fees.

POST https://zateway.com/api/v1/sessions with x-api-key — then open checkoutUrl from FastAPI.
// Prefer chain: "base" for FastAPI checkout