{"uid":"cap_5gD3m-mOhJRHlI0wfNiz3","slug":"postal-code-lookup-reverse-geocoding-zippopotam-us-geonames-c1fddb26","name":"Postal Code Lookup & Reverse Geocoding (Zippopotam.us / GeoNames)","description":"Postal code resolution for ~60 countries via Zippopotam.us (GeoNames data, CC BY 4.0). Forward: ?country=us&code=90210 -> place names, state, lat/lon. Reverse: ?country=us&state=ca&city=beverly hills -> matching postal codes with coordinates. Unknown codes return found=false (an explicit validation verdict). Cached 30 days.","url":"https://x402-datashop-production.up.railway.app/v1/geo/postal","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["country"],"properties":{"city":{"type":"string","description":"City name (reverse mode, with state)"},"code":{"type":"string","description":"Postal code to resolve (forward mode)"},"state":{"type":"string","description":"State/region name or code (reverse mode, with city)"},"country":{"type":"string","description":"2-letter ISO country code, e.g. us, fr, de"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/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_gczz8K1jWYFokHfiL6Mr6","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":"Resolves postal codes to place names, state, lat/lon for ~60 countries, or reverses city+state to matching postal codes with coordinates","exampleAgentPrompt":"What city and state does zip code 90210 belong to in the US, and what are its coordinates?","exampleUseCases":null,"resultDescription":"For forward lookup: place name(s), state/region, latitude, longitude associated with the postal code, plus a found=true/false validation verdict. For reverse lookup: list of matching postal codes for the given city and state, each with coordinates. Results are cached for 30 days.","failureModes":["Unknown or invalid postal code returns found=false rather than an error","Missing required country parameter returns 400 error","Unsupported country code may return found=false or error","Reverse mode requires both city and state parameters; missing either may return empty results","Rate limiting or payment failure returns 402"],"whenToPreferThis":"Use this endpoint when you need fast, validated postal code geocoding for any of ~60 supported countries, want an explicit found=true/false validation signal, or need to reverse-lookup postal codes from a city and state. Prefer over generic geocoders when working specifically with postal codes rather than street addresses.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:46:19.047Z","isFirstParty":false}