x402 Payments Playground
Configure payment request parameters and run an end to end paid API call.
Configuration
Amount in USD quoted for payment requirements.
Verifies and settles x402 payments on-chain.
Blockchain timestamp receipt
Pay from a different chain
Pay via on-chain ERC-20 transfer (gas-free on SKALE)
Give buyers free calls before payment
Health check before accepting payment
Auto-reject after repeated failures
Auto-credit on endpoint errors (5xx)
Inject live on-chain reputation into 402 response
Record successRate and responseTime on-chain after settlement
Fetch on-chain reputation from Solana and inject into 402 response
Record reputation on-chain via Solana MPL Core NFT program
Pay for access with USDC on Base.
Ready for a paid API request.
Default playground endpoint: https://api.relai.fi/api/playground/premium?network=base&asset=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&amountUsd=0.01&payTo=0x1892f72fdB3A966b2AD8595aA5f7741Ef72d6085&waitUntil=simulated&paymentScheme=exact
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