On-chain coin flip with verifiable randomness: POST to /x402/flip, pay USDC via x402, receive a Chainlink VRF-backed heads/tails result. Tamper-proof, non-custodial. Supports MCP, curl, Python, Rust/Go, and a Claude skill manifest. Auto-bridged across Base and Solana.
{
"mcpServers": {
"flipr": {
"url": "https://flipr-x402.fly.dev",
"transport": "http",
"x402": { "wallet": "env:X402_WALLET", "maxUsdPerCall": 0.93 }
}
}
}