🎁 First call FREE for new wallets — a real $0.05 settlement, instantly rebated. Net cost: $0.
⚡ RAEN x402 Live Playground
This page fires a real request at a live RAEN x402 service on Base mainnet and shows you the actual HTTP 402 Payment Required challenge it returns — the exact machine-payable handshake your agent would complete with USDC.
Pick a service:
[ click a service to see a live 402 challenge ]
✓ You just decoded a live challenge — here's what to do next
- Hook up an agent in 2 minutes: follow the MCP client quickstart (Claude Desktop, Cursor, any Streamable-HTTP client).
- Get a free 30-day dev key (self-serve): POST your email to raen-mcp-gateway.fly.dev/keys/request — verification link arrives by email, rate limit 3/day/IP.
- First call free: new wallets pay the 402 price and get it instantly rebated on-chain. Net cost $0.
- See who's actually paying: the public sales ledger and proof of commerce are updated live.
The challenge JSON is exactly what an x402 client receives: scheme, network eip155:8453 (Base), payTo address, and price. Copy it, point any x402-enabled agent at it, and it can pay. Your first call can be free — RAEN runs a charge-and-rebate rail: you pay the 402 price, a rebater instantly sends it back. Net cost $0.00.
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