Building a real estate tool
The APIs you would realistically stitch together, grouped by role: core data first, then enrichment, images and location.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
AcreLensScores US land parcels for off-grid, rural or investment suitability using solar, water and flood data. Data & Knowledge › Datasets | Paid | API key | JSON | — | Live |
AirNowHourly AQI observations and daily air quality forecasts for the US, Canada and Mexico by zip or coordinate. Weather & Environment › Air Quality | Free | API key | JSON | — | Live |
API AdresseFrench government address geocoding and reverse geocoding, built from the national address database. Location & Mapping › Geocoding | Free | None | JSON | — | Live |
API Adresse (Base Adresse Nationale)Searches and geocodes official French addresses from the national address database, no key needed. Location & Mapping › Geocoding | Free | None | JSON | Unlimited | Live |
AtlasFetchReverse-geocodes coordinates to country, region and municipality with ISO codes. Location & Mapping › Geocoding | Freemium | API key | JSON | <100/day | Live |
Base Adresse Nationale (adresse.data.gouv.fr)Geocodes and reverse-geocodes French addresses using France's official national address database. Location & Mapping › Geocoding | None | JSON | Unlimited | Live | |
Bing MapsGeocoding, routing and map tiles from Microsoft Bing Maps, being retired in favour of Azure Maps. Location & Mapping › Geocoding | Paid | API key | JSON | — | Deprecated |
bng2latlongConverts British National Grid (OSGB36) easting/northing to WGS84 latitude/longitude. Location & Mapping › Geocoding | Free | None | JSON | Unlimited | Live |
BrasilAPIBrazilian public data lookups: postal codes, company registry (CNPJ), banks, holidays, DDD codes and more. Data & Knowledge › Open Government Data | Free | None | JSON | — | Live |
BuildDataBuilding permits, licences, zoning, inspections and contractor records from 55 Canadian cities. Data & Knowledge › Open Government Data | Freemium | API key | JSON | 100–1k/day | Live |
CARTO BasemapsOpenStreetMap-based raster and vector basemap tiles with a free API key up to 5M requests/month. Location & Mapping › Maps & Tiles | Freemium | API key | Binary | 10k+/day | Live |
Census.govUS Census Bureau demographic, economic and geographic data (ACS, decennial census, and more) by area. Data & Knowledge › Demographics | Free | API key | JSON | Unlimited | Untested |
Complete Criminal ChecksSearches US sex offender registries, inmate records and active warrants by name across all 50 states. Identity & Security › Background Checks | Freemium | API key | JSON | — | Live |
CoworkingViewCoworking space listings with operator-published prices across 63 European and Gulf cities. Finance & Commerce › Real Estate | Free | None | JSON | Unlimited | Live |
DimdomPolish property listings, agency profiles, and TERYT geographic hierarchy from Dimdom's public API. Finance & Commerce › Real Estate | Free | None | JSON | 10k+/day | Live |
DistrictAPILooks up US school districts and schools by address, with enrollment, spending and boundary data. Data & Knowledge › Open Government Data | Freemium | API key | JSON | <100/day | Live |
GeoapifyGeocoding, reverse geocoding, routing, places, and map-tile APIs built on OpenStreetMap data. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
Geocode.xyzForward and reverse geocoding, batch geocoding, and text geoparsing built on open address datasets. Location & Mapping › Geocoding | Freemium | None | JSON | — | Live |
Geocodify.comForward/reverse geocoding, address parsing, geoparsing and elevation lookups built on OpenStreetMap data. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
GeocodioForward and reverse geocoding with address standardization plus Census, district and timezone enrichment. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
GeoDataSourceReverse-geocodes coordinates into the nearest city, country, timezone and currency data. Location & Mapping › Geocoding | Freemium | API key | JSON | <100/day | Live |
GeokeoForward and reverse geocoding built on OpenStreetMap, GeoNames and other open datasets. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
Google Maps Platform (Geocoding API)Converts addresses to geographic coordinates and back, using Google's global address database. Location & Mapping › Geocoding | Freemium | API key | JSON | 100–1k/day | Live |
Hail HistoryLooks up NOAA NEXRAD-detected hail history for a US address or coordinate, by year and day. Weather & Environment › Natural Disasters | Free | None | JSON | Unlimited | Live |
HasData: Structured Web Data APIsExtracts structured JSON from Google Search, Maps, Amazon, Zillow, and general web pages via 40 endpoints. Developer Tools › Web Scraping | Freemium | API key | JSON | — | Live |
IsItWaterTells you whether a latitude/longitude point is on water or land, using OpenStreetMap data. Location & Mapping › Geocoding | Freemium | API key | JSON | — | Live |
LatLngGeocoding, reverse geocoding, places search, and static maps built on OpenStreetMap data. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
Lob.comVerifies, autocompletes and standardizes US mailing addresses, plus ZIP and reverse-geocode lookups. Location & Mapping › Geocoding | Paid | API key | JSON | — | Live |
LocationIQForward/reverse geocoding, autocomplete, routing and static maps, Nominatim-compatible, key required. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
LogoKitFetches company logos and brand images by domain, brand name, or stock ticker. Utilities › Logos & Favicons | Freemium | API key | Binary | 1k–10k/day | Live |
MapbaseResolves coordinates and search terms to official administrative locations, postcodes, zones and boundaries. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
Mapbox GeocodingForward, reverse and batch geocoding of addresses, streets and places for display on Mapbox maps Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
MapQuestGeocoding, routing, places search and static maps API with a limited-time free transaction tier. Location & Mapping › Geocoding | Freemium | API key | JSON | — | Live |
Metadapi Zip CodeUS ZIP code lookup with demographics, IRS income stats, distance and radius search, updated monthly. Location & Mapping › Geocoding | Freemium | API key | JSON | 100–1k/day | Live |
MicroburbsAustralian property and suburb data: valuations, sales/rent history, risk overlays, schools, demographics. Finance & Commerce › Real Estate | Freemium | API key | JSON | — | Live |
OneMapSearches Singapore addresses and buildings, returning coordinates and postal details. Location & Mapping › Geocoding | API key | JSON | — | Live | |
OpenCageForward and reverse geocoding built on OpenStreetMap plus national address registries. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
OpenPLZ APIStreet, postal code, and municipality lookups for Germany, Austria, Switzerland, Liechtenstein. Location & Mapping › Geocoding | None | JSON | Unlimited | Live | |
positionstackForward and reverse geocoding for addresses and coordinates worldwide, with country and timezone data. Location & Mapping › Geocoding | Freemium | API key | JSON | <100/day | Untested |
PostaliPostal code lookup, validation, and search for Mexico, Colombia, and Spain from official postal data. Location & Mapping › Geocoding | Free | None | JSON | Unlimited | Live |
Postcodes.ioValidates and geocodes UK postcodes, returning administrative, electoral and census-area data. Location & Mapping › Geocoding | None | JSON | Unlimited | Live | |
Realie Property Data APIUS parcel, ownership, mortgage, tax and zoning data by address, parcel ID, or map location. Finance & Commerce › Real Estate | Freemium | API key | JSON | — | Live |
RentCastUS property records, sale/rent value estimates, active listings and market stats for 150M+ properties. Finance & Commerce › Real Estate | Freemium | API key | JSON | <100/day | Live |
RevAddressUS address standardization, parsing, and geocoding on Census data, with BYOK USPS verification. Location & Mapping › Geocoding | Freemium | API key | JSON | <100/day | Down |
Smarty US Autocomplete ProAutocompletes and validates US street addresses against USPS data as users type. Location & Mapping › Geocoding | Free trial | API key | JSON | <100/day | Live |
Smarty US Extract APIFinds and standardizes US postal addresses embedded in free-form text, like emails or documents. Location & Mapping › Geocoding | Free trial | API key | JSON | — | Untested |
SolematicaEstimates solar panel production, ROI and cost for Italian roofs using satellite and irradiance data. Weather & Environment › Energy | Freemium | API key | JSON | — | Live |
Tallytopia73 deterministic calculators (finance, health, math, space, sports) as JSON, with step-by-step working. Utilities › Math | Free | None | JSON | 10k+/day | Live |
TomTomMaps, geocoding, routing, places and traffic data from TomTom, with per-API monthly free quotas. Location & Mapping › Geocoding | Freemium | API key | JSON | 100–1k/day | Live |
TrustyDataFrench address verification, geocoding, SIRENE company search and trade-area analysis from open data. Location & Mapping › Geocoding | Freemium | API key | JSON | 1k–10k/day | Live |
US Mortgage CalculatorCalculates US mortgage payments, PMI, affordability, refinancing, closing costs, and property tax by state. Finance & Commerce › Real Estate | Free | None | JSON | — | Live |
US Street AddressValidates and standardizes US street addresses against USPS and proprietary datasets. Location & Mapping › Geocoding | Free trial | API key | JSON | — | Live |
US ZipCodeLooks up US ZIP Codes from city/state, or city/state from a ZIP Code, via USPS-based data. Location & Mapping › Geocoding | Free trial | API key | JSON | — | Live |
Utah AGRCFree geocoding and spatial search across 300+ Utah state GIS data layers, key required. Location & Mapping › Geocoding | Free | API key | JSON | Unlimited | Live |
ViaCEPLooks up Brazilian street addresses and IBGE/DDD codes by postal code (CEP), no key needed. Location & Mapping › Geocoding | Free | None | JSON | Unlimited | Live |
ZipCodeAPIDistance, radius search, and location lookups between US zip codes and Canadian postal codes. Location & Mapping › Geocoding | Freemium | API key | JSON | 100–1k/day | Live |
ZipcodestackLooks up postal codes worldwide with location, distance, radius and geometry queries. Location & Mapping › Geocoding | Freemium | API key | JSON | <100/day | Live |
Zippopotam.usLooks up place, state and coordinates for a postal code, or postal codes for a city, across 60+ countries. Location & Mapping › Geocoding | Free | None | JSON | Unlimited | Live |
AcreLensPaidLive
Scores US land parcels for off-grid, rural or investment suitability using solar, water and flood data.
API key · JSON
—
llms.txt
AirNowFreeLive
Hourly AQI observations and daily air quality forecasts for the US, Canada and Mexico by zip or coordinate.
API key · JSON
—
no machine-readable spec
API AdresseFreeLive
French government address geocoding and reverse geocoding, built from the national address database.
None · JSON
—
no machine-readable spec
API Adresse (Base Adresse Nationale)FreeLive
Searches and geocodes official French addresses from the national address database, no key needed.
None · JSON
Unlimited
no machine-readable spec
AtlasFetchFreemiumLive
Reverse-geocodes coordinates to country, region and municipality with ISO codes.
API key · JSON
<100/day
MCP server · llms.txt
Base Adresse Nationale (adresse.data.gouv.fr)Live
Geocodes and reverse-geocodes French addresses using France's official national address database.
None · JSON
Unlimited
no machine-readable spec
Bing MapsPaidDeprecated
Geocoding, routing and map tiles from Microsoft Bing Maps, being retired in favour of Azure Maps.
API key · JSON
—
MCP server
bng2latlongFreeLive
Converts British National Grid (OSGB36) easting/northing to WGS84 latitude/longitude.
None · JSON
Unlimited
OpenAPI spec
BrasilAPIFreeLive
Brazilian public data lookups: postal codes, company registry (CNPJ), banks, holidays, DDD codes and more.
None · JSON
—
no machine-readable spec
BuildDataFreemiumLive
Building permits, licences, zoning, inspections and contractor records from 55 Canadian cities.
API key · JSON
100–1k/day
OpenAPI spec · llms.txt
CARTO BasemapsFreemiumLive
OpenStreetMap-based raster and vector basemap tiles with a free API key up to 5M requests/month.
API key · Binary
10k+/day
MCP server · llms.txt
Census.govFreeUntested
US Census Bureau demographic, economic and geographic data (ACS, decennial census, and more) by area.
API key · JSON
Unlimited
no machine-readable spec
Complete Criminal ChecksFreemiumLive
Searches US sex offender registries, inmate records and active warrants by name across all 50 states.
API key · JSON
—
no machine-readable spec
CoworkingViewFreeLive
Coworking space listings with operator-published prices across 63 European and Gulf cities.
None · JSON
Unlimited
OpenAPI spec · MCP server · llms.txt
DimdomFreeLive
Polish property listings, agency profiles, and TERYT geographic hierarchy from Dimdom's public API.
None · JSON
10k+/day
OpenAPI spec
DistrictAPIFreemiumLive
Looks up US school districts and schools by address, with enrollment, spending and boundary data.
API key · JSON
<100/day
OpenAPI spec · MCP server · llms.txt
GeoapifyFreemiumLive
Geocoding, reverse geocoding, routing, places, and map-tile APIs built on OpenStreetMap data.
API key · JSON
1k–10k/day
no machine-readable spec
Geocode.xyzFreemiumLive
Forward and reverse geocoding, batch geocoding, and text geoparsing built on open address datasets.
None · JSON
—
no machine-readable spec
Geocodify.comFreemiumLive
Forward/reverse geocoding, address parsing, geoparsing and elevation lookups built on OpenStreetMap data.
API key · JSON
1k–10k/day
no machine-readable spec
GeocodioFreemiumLive
Forward and reverse geocoding with address standardization plus Census, district and timezone enrichment.
API key · JSON
1k–10k/day
OpenAPI spec · llms.txt
GeoDataSourceFreemiumLive
Reverse-geocodes coordinates into the nearest city, country, timezone and currency data.
API key · JSON
<100/day
OpenAPI spec · llms.txt
GeokeoFreemiumLive
Forward and reverse geocoding built on OpenStreetMap, GeoNames and other open datasets.
API key · JSON
1k–10k/day
no machine-readable spec
Google Maps Platform (Geocoding API)FreemiumLive
Converts addresses to geographic coordinates and back, using Google's global address database.
API key · JSON
100–1k/day
no machine-readable spec
Hail HistoryFreeLive
Looks up NOAA NEXRAD-detected hail history for a US address or coordinate, by year and day.
None · JSON
Unlimited
OpenAPI spec · llms.txt
HasData: Structured Web Data APIsFreemiumLive
Extracts structured JSON from Google Search, Maps, Amazon, Zillow, and general web pages via 40 endpoints.
API key · JSON
—
MCP server · llms.txt
IsItWaterFreemiumLive
Tells you whether a latitude/longitude point is on water or land, using OpenStreetMap data.
API key · JSON
—
no machine-readable spec
LatLngFreemiumLive
Geocoding, reverse geocoding, places search, and static maps built on OpenStreetMap data.
API key · JSON
1k–10k/day
MCP server
Lob.comPaidLive
Verifies, autocompletes and standardizes US mailing addresses, plus ZIP and reverse-geocode lookups.
API key · JSON
—
no machine-readable spec
LocationIQFreemiumLive
Forward/reverse geocoding, autocomplete, routing and static maps, Nominatim-compatible, key required.
API key · JSON
1k–10k/day
no machine-readable spec
LogoKitFreemiumLive
Fetches company logos and brand images by domain, brand name, or stock ticker.
API key · Binary
1k–10k/day
OpenAPI spec · MCP server · llms.txt
MapbaseFreemiumLive
Resolves coordinates and search terms to official administrative locations, postcodes, zones and boundaries.
API key · JSON
1k–10k/day
OpenAPI spec · llms.txt
Mapbox GeocodingFreemiumLive
Forward, reverse and batch geocoding of addresses, streets and places for display on Mapbox maps
API key · JSON
1k–10k/day
llms.txt
MapQuestFreemiumLive
Geocoding, routing, places search and static maps API with a limited-time free transaction tier.
API key · JSON
—
OpenAPI spec · llms.txt
Metadapi Zip CodeFreemiumLive
US ZIP code lookup with demographics, IRS income stats, distance and radius search, updated monthly.
API key · JSON
100–1k/day
no machine-readable spec
MicroburbsFreemiumLive
Australian property and suburb data: valuations, sales/rent history, risk overlays, schools, demographics.
API key · JSON
—
OpenAPI spec · MCP server · llms.txt
OneMapLive
Searches Singapore addresses and buildings, returning coordinates and postal details.
API key · JSON
—
no machine-readable spec
OpenCageFreemiumLive
Forward and reverse geocoding built on OpenStreetMap plus national address registries.
API key · JSON
1k–10k/day
OpenAPI spec · llms.txt
OpenPLZ APILive
Street, postal code, and municipality lookups for Germany, Austria, Switzerland, Liechtenstein.
None · JSON
Unlimited
no machine-readable spec
positionstackFreemiumUntested
Forward and reverse geocoding for addresses and coordinates worldwide, with country and timezone data.
API key · JSON
<100/day
llms.txt
PostaliFreeLive
Postal code lookup, validation, and search for Mexico, Colombia, and Spain from official postal data.
None · JSON
Unlimited
no machine-readable spec
Postcodes.ioLive
Validates and geocodes UK postcodes, returning administrative, electoral and census-area data.
None · JSON
Unlimited
no machine-readable spec
Realie Property Data APIFreemiumLive
US parcel, ownership, mortgage, tax and zoning data by address, parcel ID, or map location.
API key · JSON
—
OpenAPI spec · llms.txt
RentCastFreemiumLive
US property records, sale/rent value estimates, active listings and market stats for 150M+ properties.
API key · JSON
<100/day
llms.txt
RevAddressFreemiumDown
US address standardization, parsing, and geocoding on Census data, with BYOK USPS verification.
API key · JSON
<100/day
OpenAPI spec · llms.txt
Smarty US Autocomplete ProFree trialLive
Autocompletes and validates US street addresses against USPS data as users type.
API key · JSON
<100/day
no machine-readable spec
Smarty US Extract APIFree trialUntested
Finds and standardizes US postal addresses embedded in free-form text, like emails or documents.
API key · JSON
—
no machine-readable spec
SolematicaFreemiumLive
Estimates solar panel production, ROI and cost for Italian roofs using satellite and irradiance data.
API key · JSON
—
llms.txt
TallytopiaFreeLive
73 deterministic calculators (finance, health, math, space, sports) as JSON, with step-by-step working.
None · JSON
10k+/day
OpenAPI spec
TomTomFreemiumLive
Maps, geocoding, routing, places and traffic data from TomTom, with per-API monthly free quotas.
API key · JSON
100–1k/day
OpenAPI spec
TrustyDataFreemiumLive
French address verification, geocoding, SIRENE company search and trade-area analysis from open data.
API key · JSON
1k–10k/day
llms.txt
US Mortgage CalculatorFreeLive
Calculates US mortgage payments, PMI, affordability, refinancing, closing costs, and property tax by state.
None · JSON
—
OpenAPI spec · MCP server · llms.txt
US Street AddressFree trialLive
Validates and standardizes US street addresses against USPS and proprietary datasets.
API key · JSON
—
no machine-readable spec
US ZipCodeFree trialLive
Looks up US ZIP Codes from city/state, or city/state from a ZIP Code, via USPS-based data.
API key · JSON
—
no machine-readable spec
Utah AGRCFreeLive
Free geocoding and spatial search across 300+ Utah state GIS data layers, key required.
API key · JSON
Unlimited
no machine-readable spec
ViaCEPFreeLive
Looks up Brazilian street addresses and IBGE/DDD codes by postal code (CEP), no key needed.
None · JSON
Unlimited
no machine-readable spec
ZipCodeAPIFreemiumLive
Distance, radius search, and location lookups between US zip codes and Canadian postal codes.
API key · JSON
100–1k/day
OpenAPI spec
ZipcodestackFreemiumLive
Looks up postal codes worldwide with location, distance, radius and geometry queries.
API key · JSON
<100/day
OpenAPI spec · llms.txt
Zippopotam.usFreeLive
Looks up place, state and coordinates for a postal code, or postal codes for a city, across 60+ countries.
None · JSON
Unlimited
no machine-readable spec
Nothing matches that combination. Clear the filters and start from the category.