API Reference

Base URL

• V2 (recommended): https://api.x402.unibase.com/v2

• V1: https://api.x402.unibase.com/v1

Supported Networks

• BSC mainnet

• BSC testnet

Endpoints

Method	Endpoint	Description
GET	/verify	Verify payment
POST	/verify	Verify payment
GET	/settle	Settle payment
POST	/settle	Settle payment
GET	/health	Health check
GET	/supported	Supported networks and schemes

Payment Schemes

• exact — Supported on both V1 and V2

Supported Assets (V2)

• All ERC20 tokens via Permit2

• EIP-3009 assets

Permit2 Proxy (BNB Chain)

0x98D0E9d6DC5BCd6FBB75b49dCd0204E966732392