3 Best APIs for Places in Nigeria

OpenStreetMap Nominatim is the official geocoding service built on OpenStreetMap (OSM) data, providing free geocoding (converting addresses to geographic coordinates) and reverse geocoding (converting coordinates to human-readable addresses). Nominatim is completely free, requires no API key or account registration, and is maintained as an open-source project that can be self-hosted. For Nigerian developers seeking a cost-free geocoding solution with no vendor lock-in, Nominatim is the go-to choice, particularly for open-source projects, NGO applications, civic tech tools, and early-stage startups without mapping budgets. The data underlying Nominatim is contributed by the global OpenStreetMap community — a collaborative project similar to Wikipedia where volunteers map the physical world. Nigeria has an active OSM community, and major Nigerian cities (Lagos, Abuja, Port Harcourt, Kano, Ibadan, Enugu) have significant street-level mapping. However, Nigerian OSM coverage is variable — dense urban areas are well-mapped while rural areas and smaller towns may have incomplete data. Applications requiring complete and consistent coverage of all Nigerian locations should supplement Nominatim with Google Maps or another commercial provider for addresses where OSM data is sparse. The Nominatim Search API geocodes a text query (an address, place name, or search phrase) and returns matching locations with coordinates, structured address components, and OSM object references. A search for "Adeola Odeku Street, Victoria Island, Lagos" returns the coordinates and structured address for that street. Nominatim handles both formal addresses and informal place name searches — querying "Balogun Market Lagos" returns the market's location. The search results include a bounding box useful for map display, an importance score for ranking multiple matches, and the type and class of the matched OSM object (highway, amenity, building, etc.). Reverse geocoding converts a latitude/longitude coordinate pair to the closest address or place name in the OSM database. Given coordinates from a GPS device, a user's browser, or any other source, Nominatim returns the street address, neighborhood, local government area, state, and country. For Nigerian field data collection applications, IoT deployments, or logistics systems, reverse geocoding translates raw coordinates into meaningful administrative context — identifying not just the address but the local government area (LGA) and state, which is important for Nigerian administrative and regulatory purposes. Structured address output from Nominatim provides parsed address components — house number, road, suburb, city, state, postcode (where available), country code — as separate fields rather than just a formatted string. This structured output is valuable for Nigerian applications that need to extract specific address components for database storage, validation, or routing to different fulfillment locations based on state or LGA. The public Nominatim instance at nominatim.openstreetmap.org has a strict rate limit of one request per second and requires a valid HTTP User-Agent header identifying the application making the request. This rate limit makes the public instance unsuitable for high-volume production use — applications sending hundreds or thousands of geocoding requests will be blocked. For production workloads beyond the public limit, there are two options: self-hosting a Nominatim instance, or using one of the many commercial geocoding services that build on OSM data (such as Geoapify, OpenCage, or Pelias) with their own Nominatim instances and higher rate limits. Self-hosting Nominatim requires downloading the OpenStreetMap data extract for Nigeria (or all of Africa, or the full planet) and running the Nominatim software on a server. The Nigeria extract is relatively small (under 1GB compressed), making it feasible to run on a modest VPS. A self-hosted Nominatim instance has no rate limits, processes all requests locally without internet dependency, and can be tuned for performance. For Nigerian applications with consistent geocoding needs, self-hosting eliminates per-request costs entirely while providing full control over update frequency (OSM data is updated continuously, and self-hosted instances can be updated regularly). A key advantage of Nominatim for Nigerian civic applications is the OSM ecosystem's open license. OSM data is licensed under the Open Database License (ODbL), which allows free use with attribution requirements. Nigerian NGOs, government agencies, research institutions, and civic tech organizations can use Nominatim data in their applications and publications without commercial licensing concerns, provided they comply with the attribution requirements.

Foursquare Places API provides access to Foursquare's proprietary global place database — one of the most curated and trusted location datasets in the world, covering over 100 million businesses, venues, and points of interest across 190+ countries. Unlike Google Maps which aggregates data from many sources, Foursquare's place data is known for its editorial curation and accuracy, built over a decade from user check-ins, business submissions, and data partnerships. For Nigerian developers building location-aware applications, Foursquare offers a high-quality alternative to Google Places with good coverage of major Nigerian urban areas. Nigerian venue coverage in Foursquare includes businesses, restaurants, hotels, landmarks, entertainment venues, banks, and points of interest in Lagos, Abuja, Port Harcourt, Kano, Ibadan, and other major cities. Each venue in the Foursquare database is enriched with standardized category information from Foursquare's hierarchical category taxonomy — a consistent system that categorizes every place into one of thousands of specific categories (Nigerian restaurant, commercial bank, shopping mall, hospital, petrol station) with parent categories enabling broad-to-specific filtering. The Place Search endpoint finds venues near a given geographic coordinate or within a specified geographic area, with filtering by category, radius, open-now status, and price level. Nigerian applications can search for all restaurants within 2km of a user's location in Ikeja, or find all ATMs in the Wuse II area of Abuja, with results returning standardized venue data including name, address, coordinates, category, and Foursquare place ID. Place Autocomplete supports building predictive search inputs where users type a place name or address and receive matching suggestions from Foursquare's database. As the user types "Zenith" in a Lagos context, Foursquare suggests matching Zenith Bank branches, Zenith Mall, and other places with "Zenith" in their name. This is particularly useful for Nigerian applications with place search or venue tagging features. Place Details retrieves comprehensive information about a specific Foursquare venue identified by its place ID. The response includes the full address, geographic coordinates, phone number, website URL, opening hours, price tier, category, photos (where available), and tips from Foursquare's community of users. For Nigerian hospitality or entertainment applications, this rich venue data enables detailed listing pages without maintaining the data manually. Place Match is a powerful deduplication and enrichment feature. Given a business name, address, phone number, or website for a Nigerian business, Place Match finds the corresponding Foursquare venue record and returns the Foursquare place ID and enriched data. Nigerian businesses building directories or data products can use Place Match to standardize and enrich their existing records against Foursquare's curated database — resolving duplicate entries, standardizing category assignments, and filling missing fields. Reverse Geocoding converts geographic coordinates (GPS latitude/longitude) to human-readable location context — the nearest named place, address, neighborhood, and administrative boundaries. Nigerian logistics and field service applications can use Foursquare reverse geocoding to convert delivery driver GPS coordinates into meaningful location descriptions that dispatchers and customers can understand. Authentication for the Foursquare Places API uses an API key for server-side calls or OAuth 2.0 for user-context applications. The free tier provides 1,000 API calls per day — sufficient for development, testing, and low-traffic applications. Paid plans with higher daily limits and access to premium data attributes are available for production applications with higher search volumes. Compared to Google Places, Foursquare Places is generally considered to have slightly less comprehensive Nigerian coverage but offers strong data curation, a well-designed category system, and enterprise-grade data licensing terms that some businesses prefer for data product use cases. For Nigerian developers evaluating location data providers, Foursquare is a high-quality alternative worth considering, particularly for applications needing reliable venue categorization and place deduplication at scale.