{"uid":"cap_FuzOPVREKyiS1Xr2Tev4G","slug":"quantaflow-x402-api-gateway-zippopotam-proxy-0c27eac0","name":"QuantaFlow x402 API Gateway – Zippopotam Proxy","description":"Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.","url":"https://quanta-roan.vercel.app/api/service/zippopotam?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"body":{"type":"string","description":"Optional JSON body forwarded to POST requests."},"path":{"type":"string","description":"Path below the selected upstream origin."},"query":{"type":"object"},"method":{"enum":["GET","POST"],"type":"string"}}},"responseSchema":{"description":"The upstream response body and content type are passed through after successful payment."},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_oJqXe1qmAb-8pGKJl1Szh","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Proxies requests to the Zippopotam postal code lookup API via x402 micropayment protocol, charging $0.01 USDC per call.","exampleAgentPrompt":"Look up the city, state, and country for US ZIP code 90210 using the Zippopotam proxy — I need the place name and region details.","exampleUseCases":[{"title":"ZIP code to city name lookup","prompt":"What city and state does ZIP code 10001 belong to? I need the full place name and state abbreviation."},{"title":"Postal code validation for checkout","prompt":"Check if postal code SW1A 1AA is a valid UK postcode and tell me what place it maps to."},{"title":"Address enrichment from ZIP","prompt":"I have a list of US ZIP codes — start with 94103 and tell me the city, state, and country it corresponds to so I can fill in missing address fields."}],"resultDescription":"Returns the upstream Zippopotam JSON response, which typically includes the postal code, country, country abbreviation, and an array of places with city name, state, state abbreviation, latitude, and longitude.","failureModes":["Payment failure if wallet lacks sufficient USDC, returning a 402 Payment Required error","Invalid or non-existent postal code returns a 404 from upstream Zippopotam","Malformed path or query parameters result in an upstream error passed through","Rate limiting or upstream Zippopotam downtime returns a 5xx error","Incorrect country code prefix in path yields empty or error response"],"whenToPreferThis":"Use this endpoint when you need postal code geographic lookups (city, state, country, coordinates) and are operating in a web3/x402 micropayment context where per-call USDC billing is acceptable. Prefer it over direct Zippopotam access when you need payment-gated, metered usage without managing API keys, or when building DeFi-adjacent workflows that already use x402 payment rails.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-16T18:44:06.506Z","isFirstParty":false,"canonicalSlug":"quantaflow-x402-api-gateway-zippopotam-proxy-0c27eac0"}