M
API Matrix

GeoDataSource API

⭐ Beginner's Pick Geocoding / API Key Intermediate HTTPS
Varies by plan (check documentation)
72 Score
Grade B
Visit Official Site Compare Alternatives

Overview

GeoDataSource lets you look up city names from latitude and longitude coordinates, making it simple to reverse-geocode a GPS position into a readable location. It also supports distance calculations between coordinates and city-to-coordinate lookups. A free tier is available with a limited number of daily API calls.

💡

Beginner Tip

Use the free-tier endpoint to reverse-geocode coordinates into city names — it is the simplest starting point and requires only a latitude, longitude, and your API key.

Available Data

repository name and description
star and fork counts
contributor data
issues and pull requests
commit history
IP address details

Example Response

JSON Response 
{
  "status": "success",
  "data": {
    "result": "Data from GeoDataSource",
    "description": "Geocoding of city name by using latitude and longitude coordinates",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

city Name of the nearest city to the provided coordinates.
state State or province name for the location.
country Full country name for the location.
countryCode ISO 3166-1 alpha-2 two-letter country code.
latitude Latitude of the identified city center.
longitude Longitude of the identified city center.

Implementation Example 

const url = "https://www.geodatasource.com/web-service";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
  headers: {
  "X-API-Key": "YOUR_API_KEY"
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

{"status":"INVALID_API_KEY"} The API key provided is missing or incorrect.
✓ Sign up at geodatasource.com and replace YOUR_API_KEY with your actual key.
{"status":"OVER_QUERY_LIMIT"} You have exceeded the daily request limit on the free plan.
✓ Wait until the next day for the limit to reset, or upgrade to a paid plan for higher quotas.
Empty city field in response The coordinates provided are in an ocean, uninhabited area, or are malformed.
✓ Verify the lat/lng values are valid decimal degrees (e.g. lat between -90 and 90, lng between -180 and 180).

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 5/20
🔒 Security 15/15
🛠 Developer XP 12/20
✓ Reliability 10/15

Partially tested on Apr 5, 2026

Technical Specifications

Auth API Key
HTTPS REQUIRED
CORS UNKNOWN
Category Geocoding
Difficulty Intermediate
Verified: 2026-04-04

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