{"uid":"cap_M96Syo5_etYon3L225BfP","slug":"eckari-us-census-geography-lookup-8c685733","name":"Eckari US Census Geography Lookup","description":"Return the US Census Bureau geographies containing a latitude/longitude — state, county, census tract, block group, census block, incorporated place, congressional district and ZIP Code Tabulation Area — each with its FIPS or GEOID. The standard way to attach official US statistical geography to a point. Use when: Which county and census tract is this coordinate in?","url":"https://api.eckari.com/v1/locations/us/geographies?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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["lat","lon"],"properties":{"lat":{"type":"number","maximum":90,"minimum":-90,"description":"Latitude in decimal degrees (WGS 84), e.g. 38.8977."},"lon":{"type":"number","maximum":180,"minimum":-180,"description":"Longitude in decimal degrees (WGS 84), negative in the western hemisphere, e.g. -77.0365."}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{"zcta":{"geoid":"20006"},"block":{"geoid":"110019800001034"},"place":{"name":"Washington city","geoid":"1150000"},"query":{"lat":38.8977,"lon":-77.0365},"state":{"fips":"11","name":"District of Columbia","usps":"DC"},"tract":{"name":"Census Tract 9800","geoid":"11001980000"},"county":{"fips":"11001","name":"District of Columbia"},"vintage":"Current_Current","benchmark":"Public_AR_Current","block_group":{"geoid":"110019800001"},"congressional_district":{"name":"Delegate District (at Large)","geoid":"1198"}},"meta":{"source":"census_geocoder","version":"2.0.0","freshness":"live","capability":"location.us.geographies"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Nmw1BSbj4_M7XwVDGVYEJ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns all official US Census Bureau geographies (state, county, tract, block, place, congressional district, ZCTA) containing a given latitude/longitude, each with its FIPS or GEOID.","exampleAgentPrompt":"What US Census geographies contain the White House at latitude 38.8977, longitude -77.0365? I need the state, county, census tract, block, congressional district, and ZCTA GEOIDs.","exampleUseCases":[{"title":"Demographic analysis by census tract","prompt":"I have a list of store locations with lat/lon coordinates — can you find the census tract GEOID for each one so I can pull demographic data from the ACS?"},{"title":"Congressional district assignment for voter tool","prompt":"Which congressional district does the coordinate 40.7128, -74.0060 fall in? I need the official GEOID for a voter information app."},{"title":"Regulatory compliance geo-tagging","prompt":"We're filing a report that requires the FIPS county code and census block group for our facility at latitude 33.749, longitude -84.388 in Atlanta — can you look that up?"}],"resultDescription":"A JSON object containing the full set of US Census geographies for the queried point: state (FIPS + name + USPS abbreviation), county (FIPS + name), census tract (GEOID + name), census block (GEOID), block group (GEOID), incorporated place (GEOID + name), congressional district (GEOID + name), and ZCTA (GEOID), plus the original query coordinates, Census benchmark/vintage used, and metadata about the data source and version.","failureModes":["Coordinate outside the US returns no geography matches","Invalid latitude or longitude values (out of -90/90 or -180/180 range) trigger a 400 error","Coordinates in US territories or waters may have partial or no results","Network timeout if Census Geocoder upstream is slow","Missing required lat or lon query parameters result in validation error"],"whenToPreferThis":"Use this endpoint when you need official US Census Bureau FIPS codes or GEOIDs for a geographic point — e.g. to join with ACS demographic data, comply with government reporting requirements, assign congressional districts, or enrich business location data with statistical geography. Prefer this over generic reverse geocoding services (Google Maps, Mapbox) when you specifically need Census identifiers (FIPS, GEOID) rather than street addresses or postal codes. It covers all major Census geographies in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:33:36.542Z","isFirstParty":false,"canonicalSlug":"eckari-us-census-geography-lookup-8c685733"}