{"resource":"https://x402.agentindex.world/x402-echo","service":"x402-payment-test","areas":["other"],"answering":true,"http_status":402,"latency_ms":75,"price_usdc":0.001,"buyers_30d":2,"calls_30d":287,"description":"Cheapest possible Base-mainnet x402 conformance call: settle $0.001 of USDC and receive payer identity, request echo and receipt. Built for agents testing wallets, Payment-Signature, facilitators and settlement. Try GET /x402-echo/sample.","id":"52c9d0a460e4","category":"Payments and on-ramps","accuracy":null,"tool_calls":null,"checked_day":"2026-10-11","page":"https://velliumandco.com/sellers/52c9d0a460e4"}