{"uid":"cap_KOwGs0Y6rSKwsVEOwkZP7","slug":"polyform-reverse-geocoding-api-8cd0112a","name":"Polyform Reverse Geocoding API","description":"Pay-per-call data endpoints for AI agents. USDC on Base via x402. No account, no API key — one micropayment per call.","url":"https://api.polyform.org/v1/geo/reverse","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":"object"}}}}},"responseSchema":{"type":"json","example":{"state":"Tennessee","tract":"016300","county":"Davidson County"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ktSs7pgIznZJYLr5Ewidn","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts a geographic coordinate (lat/lng) to US administrative location data including state, county, and census tract","exampleAgentPrompt":"What US state, county, and census tract is the coordinate 36.1627° N, 86.7816° W located in?","exampleUseCases":[{"title":"Enrich delivery address with county info","prompt":"I have a delivery drop point at 40.7128° N, 74.0060° W — what US state and county does that fall in, and what's the census tract?"},{"title":"Compliance tagging for financial records","prompt":"For regulatory reporting I need the state, county, and census tract for the coordinate 34.0522° N, 118.2437° W — can you look that up?"},{"title":"Geolocate a sensor reading","prompt":"My IoT sensor just reported a GPS fix at 41.8827° N, 87.6233° W — which US county and census tract is it in?"}],"resultDescription":"A JSON object containing the US state name, county name, and census tract code (FIPS-style tract identifier) for the provided coordinate, e.g. {\"state\": \"Tennessee\", \"county\": \"Davidson County\", \"tract\": \"016300\"}.","failureModes":["Coordinate outside the US returns no result or an error — endpoint only covers US geography","Missing or malformed lat/lng query parameters result in a 400 bad request","Payment failure (insufficient USDC balance or x402 protocol error) blocks the call","Coordinates on exact administrative boundary edges may resolve ambiguously"],"whenToPreferThis":"Choose this endpoint when you need lightweight, pay-per-call US reverse geocoding without account setup or API key management. It returns structured administrative identifiers (state, county, census tract) rather than full street addresses, making it ideal for compliance tagging, demographic enrichment, or census analysis workflows. Prefer this over full geocoding services when you only need administrative region classification and want zero-friction micropayment access via USDC on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:41:55.472Z","isFirstParty":false}