We Built an x402 Gateway — Here's What We Learned

This week, x402 had its biggest week yet. World launched AgentKit to give AI agents human-backed identity via x402. AWS published a full reference architecture for agentic payments on x402. Jensen Huang's GTC remarks sent AI agent tokens surging. And an academic paper (A402) proposed improvements to x402's atomicity model. Everyone is talking about x402. Very few people have actually built on it. We have. Here's what we learned. What we built Strale is a trust layer for AI agents — 256 independently tested capabilities accessible via MCP and REST API. We exposed five of those capabilities behind x402 routes so that agents with wallets can pay per request using USDC on Base, with no API key, no account, no subscription. The five capabilities behind x402 today: iban-validate — validate IBAN structure and extract bank details vat-format-validate — check EU VAT number formatting paid-api-preflight — verify a paid endpoint before your agent spends money ssl-check — certificate chain validat