API for map boundaries and geocoding

If you mean APIs for map boundaries and geocoding, here are the common options depending on what you need:

1) Geocoding APIs

Convert address → coordinates or coordinates → address.

• Google Geocoding API
  • Very accurate, widely used
  • Paid, with usage limits
• Mapbox Geocoding API
  • Good developer experience
  • Forward + reverse geocoding
• OpenStreetMap Nominatim
  • Free/open, but rate-limited and not ideal for heavy production use unless self-hosted
• HERE Geocoding API
  • Strong global coverage
• TomTom Geocoding API
  • Good alternative with mapping tools

2) Map boundary / polygon / administrative boundary APIs

Used to get city, district, state, country boundaries, or custom regions.

• GeoNames
  • Administrative boundaries and place data
• OpenStreetMap / Overpass API
  • Can query boundary relations and polygons
• Mapbox Boundaries
  • Commercial dataset/API for administrative boundaries
• Google Places / Geocoding
  • Can return viewport/bounds for places, but not full boundary polygons
• Natural Earth / GADM / OpenData portals
  • For downloadable boundary datasets rather than live APIs

3) If you need both in one workflow

Typical approach:

1. Geocode an address using Geocoding API
2. Use the returned lat/lng
3. Check which boundary polygon contains that point using:
   • PostGIS
   • Turf.js
   • Shapely / GeoPandas
   • ArcGIS / GIS services

4) Example use cases

• “Find coordinates for this address” → geocoding API
• “Get the city boundary of Paris” → boundary dataset/API
• “Check if this coordinate is inside New York City” → point-in-polygon with boundary data

5) Recommendation

• For production geocoding: Google or Mapbox
• For open/free geocoding: Nominatim
• For boundaries: OSM/Overpass, GADM, or Mapbox Boundaries

If you want, I can give you:

• a list of specific APIs with pricing
• a Python example
• or a Node.js example for geocoding + boundary lookup.