x402 Atlas

Live, verified search engine for machine-payable (HTTP 402 / x402) APIs. The "Google + Bloomberg" layer for agentic commerce: agents ask "best, cheapest, alive, trustworthy x402 endpoint for X right now?" — Atlas answers with probe-verified truth, not seller claims.

Why it wins

• Measured, not claimed — hourly probes hit every endpoint, validate the real 402 paywall, record price/latency/uptime

• Adapter layer — parses V1 (accepts[] body), V2 (PAYMENT-REQUIRED header), and the ecosystem's "GET = free buyer metadata / POST = 402 challenge" pattern (discovered live on agenttoll.dev). New spec versions = new adapter, never a rewrite

• Agent-native — JSON API, /llms.txt, and MCP server (/mcp) so Claude/Kimi/any agent can use it directly

• On-chain ready — seller identity = settlement address (payTo); phase-2 indexer tracks EIP-3009 transferWithAuthorization events (validated against a real tx: 0xc647…672d, $0.005 USDC on Base)

Related MCP server: x402-discovery

API

Develop

npm install
npx wrangler d1 migrations apply x402-atlas-db --local
npx wrangler dev          # then: curl localhost:8787/cdn-cgi/local/scheduled
curl "localhost:8787/admin/crawl?limit=3"
npm test

Deploy (first time)

npx wrangler login
npx wrangler d1 create x402-atlas-db        # put id in wrangler.jsonc
npx wrangler kv namespace create CACHE      # put id in wrangler.jsonc
npx wrangler r2 bucket create x402-atlas-snapshots
npx wrangler queues create x402-atlas-crawl
npx wrangler vectorize create x402-atlas-services --dimensions=768 --metric=cosine
npx wrangler d1 migrations apply x402-atlas-db --remote
npx wrangler secret put ADMIN_TOKEN
npm run deploy

Kaizen loop

Every search is logged (search_log); zero-result queries are demand signals. Weekly reports land in kaizen/reports/. Ranking: liveness(100) + uptime(×30) + relevance(×10) + freshness(×20) + price-verified(×10).

Roadmap

Phase 2: EIP-3009 settled-volume indexer + trust_score · Phase 3: USDC-paid seller tools & micropaid API tier (via x402 itself) · Phase 4: @x402-atlas/announce SDK, Bazaar interop, multi-chain.