Quick Start

1. Base URL

https://api.x402.unibase.com/v2

BSC mainnet and testnet supported.

2. Health Check

curl "https://api.x402.unibase.com/v2/health"

3. Key Endpoints

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

4. Protocol Flow

1. Server returns 402 with payment spec

2. Client signs payment, sends proof

3. Unibase Pay verifies and settles on-chain

5. Supported (V2)

• Assets: All ERC20 via Permit2; EIP-3009 gasless

• Scheme: exact

Next Steps

• API Reference

• Privy Wallet — Agent custodial wallet

• x402 Protocol