Open payment standard built on HTTP 402 for instant stablecoin micropayments to APIs, agents, and content — multi-chain reference implementation by Coinbase.
Decoded Solana protocol data — DEX, lending, perps, LP, staking, yield, governance, and wallet holdings — via REST, an MCP server (SSE), and a keyless x402 pay-per-call endpoint at $0.0004/call. Tiers from free (50 req/min) to Business.