{"uid":"cap_ocmOYXTPlBuIDf8zzsM_9","slug":"vibes-coded-demo-echo-endpoint-21aa684b","name":"Vibes-Coded Demo Echo Endpoint","description":"Pay-per-call JSON for AI agents: skill search, listing optimization, install plans, productization, and artifact risk scoring. HTTP 402 → USDC. Full skill marketplace on-site.","url":"https://vibes-coded.com/api/v1/seller-endpoints/vibes-demo-echo/call","method":"POST","headers":{},"bodySchema":null,"responseSchema":{},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.5","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.5/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.5","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.5","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_gfk9B8cW3fmbX9dFxUYYZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.5","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"A demo echo endpoint on the Vibes-Coded skill marketplace API that accepts a POST call and returns a JSON response, demonstrating the pay-per-call USDC (x402) billing flow for AI agent tool integrations.","exampleAgentPrompt":"Make a demo test call to the Vibes-Coded seller endpoint echo API so I can confirm my x402 USDC payment flow is working correctly.","exampleUseCases":[{"title":"Verify x402 payment integration","prompt":"Can you hit the Vibes-Coded demo echo endpoint and confirm that my USDC payment goes through and I get a valid JSON response back? I want to make sure my x402 setup is working before I call the real skill endpoints."},{"title":"Explore AI agent skill marketplace","prompt":"I want to try out the Vibes-Coded agent tool API — make a test call to their demo echo endpoint so I can see what kind of JSON response comes back and understand how their pay-per-call system works."},{"title":"Prototype agent with paid skill calls","prompt":"I'm building an AI agent and want to test it against a real pay-per-call endpoint — use the Vibes-Coded demo echo call so I can see how the 402 payment and response cycle works end to end."}],"resultDescription":"Returns a JSON response echoing or acknowledging the incoming request, demonstrating the x402 payment-gated API call cycle. The agent receives confirmation that the $0.50 USDC payment was accepted and a demo JSON payload was returned.","failureModes":["HTTP 402 returned if USDC payment is not included or insufficient — agent must attach a valid x402 payment header","Invalid JSON body may cause a 400 Bad Request","Endpoint unavailable or server error returns 5xx with no response body","Insufficient USDC wallet balance causes payment failure and no response"],"whenToPreferThis":"Choose this endpoint when you want to test or demonstrate the Vibes-Coded x402 pay-per-call payment integration without risking a full skill call. Ideal for validating wallet connectivity, USDC micropayment flows, and API integration before using production skill endpoints like listing optimization or artifact risk scoring.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:32:07.427Z","isFirstParty":false}