You gave your agent a wallet — now you're staring at hundreds of paid APIs with no way to tell which are real. Atlas is the map. Every service on it was bought with real USDC, on-chain. We publish what came back, what didn't, and the mistakes we made finding out.
x402 lets software pay for an API over HTTP — the server asks for payment, your agent pays in stablecoins, the call goes through. No account, no key, no subscription. It's the backbone of the agent-to-agent economy.
The problem: the market is loud and mostly fake. Most on-chain volume is wash trading, services go dormant without warning, and some take your money and return nothing.
Atlas is the independent layer that pays to find out. We spend real USDC calling these services ourselves and report only what actually worked — exact response, on-chain receipt, every time. The one audit that can itself be audited.
x402 just entered the Linux Foundation, backed by Stripe, Cloudflare, Visa, AWS and Google — 165M+ transactions and climbing. Atlas is the independent layer that keeps it honest: no foundation seat, no sponsor, no agenda but the receipts.
The whitelist — services we paid for and verified, each with the exact endpoint and the real response — plus how to make your first call, what to avoid, and an honest read on the market.
Read the report →The full paid-test dataset over x402 — all 128 verified services, each with its payTo, on-chain tx + amount, the captured response, and the exact request that produced it. Pure x402: pay and call, no API key. Re-tested over time so you learn what died before the catalog does. Pay-per-call.
Pay for and fetch GET https://402atlas.com/api/verified over x402 ($0.10, Base), then tell me which x402 services are worth using and which to avoid.
/.well-known/x402.json · agents reading the whole site: /llms.txtEvery finding ships with a receipt. The paid /verified API is live — follow as we widen the list.