{"uid":"cap__ukOX_RrVQnOPFi7wsVBw","slug":"hello-world-x402-vercel-app-720597b0","name":"hello-world-x402 /world - Reverse Greeting Endpoint","description":"Returns \"World Hello\" - UPDATED TEST v2.0","url":"https://hello-world-x402.vercel.app/world?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","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"string","description":"A greeting message in reverse - UPDATED FOR TESTING PROPAGATION"}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{}}},"response":{"_nonJson":true,"_preview":"World Hello","_contentType":"text/plain; charset=utf-8"}},"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"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_beW2SEbMxTK7nJ5I9K92u","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 the string 'World Hello' (a reversed greeting) as a plain-text response after micropayment verification via x402","exampleAgentPrompt":"Fetch the reversed greeting from the hello-world-x402 /world endpoint — it should return 'World Hello' as plain text after the $0.001 USDC micropayment goes through.","exampleUseCases":null,"resultDescription":"A plain-text string 'World Hello' returned with content-type text/plain; charset=utf-8. This is a simple reversed greeting used to demonstrate and test x402 pay-per-call functionality.","failureModes":["Payment not provided or incorrect amount: 402 Payment Required response with payment details","Network or Vercel deployment unavailable: 503 or timeout","Invalid HTTP method (non-GET): 405 Method Not Allowed","Payment verification failure on eip155:845 network: payment rejected or unconfirmed"],"whenToPreferThis":"Use this endpoint when you need to test or demonstrate the x402 micropayment protocol with a minimal, predictable plain-text response. It is ideal for verifying that a $0.001 USDC pay-per-call flow works end-to-end, or for integration testing of x402-enabled agent payment pipelines. Not suitable for production use cases requiring meaningful data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T06:33:00.633Z","isFirstParty":false,"canonicalSlug":"hello-world-x402-vercel-app-720597b0"}