{"uid":"cap_8ybWNPs2bSZG3WrjHeE9q","slug":"hello-world-x402-vercel-app-1a773c02","name":"Hello World Greeting (x402 Paid)","description":"Returns personalized greeting - UPDATED SCHEMA v2","url":"https://hello-world-x402.vercel.app/greet?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["name","city"],"properties":{"age":{"type":"number","maximum":120,"minimum":0,"description":"Person's age - UPDATED max to 120"},"city":{"type":"string","maxLength":100,"description":"Person's city - NEW FIELD"},"name":{"type":"string","maxLength":100,"minLength":1,"description":"Person's name - UPDATED"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["message","timestamp"],"properties":{"message":{"type":"string"},"version":{"type":"string"},"timestamp":{"type":"string"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":2,"rating":{"score":"1.00","successRate":"1.00","reviews":2,"stars":"5.0","state":"rated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_B4-XPHvfk3nDV2NZ6hc-R","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a personalized greeting message including the caller's name and city after verifying a micropayment of $0.001 USDC on Base (eip155:8453).","exampleAgentPrompt":"Get me a personalized greeting for Alex, age 28, living in San Francisco — using the hello-world-x402 greet endpoint that charges a tiny USDC micropayment.","exampleUseCases":null,"resultDescription":"A JSON object containing a personalized greeting message (e.g. 'Hello, Alex from San Francisco!'), a timestamp of when the greeting was generated, and a version field — returned after successful $0.001 USDC payment verification on Base.","failureModes":["Payment not received or incorrect amount — returns HTTP 402 with payment requirements","Payment timeout exceeded (300s) — request expires and must be retried","Missing required query params 'name' or 'city' — returns validation error","Name exceeds 100 character limit — returns schema validation error","Age value outside 0-120 range — returns validation error","Network connectivity issues with Base (eip155:8453) — payment cannot be verified"],"whenToPreferThis":"Use this endpoint when you want to test or demonstrate x402 micropayment-gated APIs on the Base network, or when you need a simple personalized greeting with a name and city. Ideal for developers evaluating USDC micropayment flows or prototyping paid-API interactions at very low cost ($0.001 per call).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":2,"lastUsedAt":"2026-06-15T21:41:02.880Z","lastSuccessfullyRanAt":"2026-06-15T21:41:02.880Z","lastHealthCheckAt":"2026-10-10T18:37:30.965Z","isFirstParty":false,"canonicalSlug":"hello-world-x402-vercel-app-1a773c02"}