Overview

LocationIQ is a flexible geocoding API that converts addresses to coordinates (forward geocoding) and coordinates back to addresses (reverse geocoding), plus supports batch lookups. It is powered by OpenStreetMap data and offers a generous free tier of 5,000 requests per day. It is a popular open-source-friendly alternative to Google Maps Geocoding.

Beginner Tip

Sign up at locationiq.com for a free API key with no credit card required. Use the /v1/search endpoint for forward geocoding and /v1/reverse for converting lat/lon back to a human-readable address.

Available Data

The kind of data this API exposes, based on its documentation. We could not call the endpoint to confirm the exact field names.

IP address details
latitude and longitude
city and country
timezone
ISP information

Example Response

Illustrative shape only — we were not able to call this endpoint (it requires credentials or exposes no public sample URL), so the fields below show the kind of data this API returns rather than a recorded response.

JSON Response · Illustrative
{
  "status": "success",
  "data": {
    "result": "Data from LocationIQ",
    "description": "Provides forward/reverse geocoding and batch geocoding",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

[0].display_name Full human-readable address of the top matching result.
[0].lat Latitude of the geocoded location as a string.
[0].lon Longitude of the geocoded location as a string.
[0].type Type of OSM feature found, e.g. city, street, or attraction.
[0].importance Relevance score between 0 and 1; higher means a better match.

Implementation Example

Calls a real endpoint of this API. Replace any placeholder credentials with your own key.

Request
const url = "https://locationiq.org/docs/";
// 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

Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.

401 Unauthorized Access Token The key parameter is missing or invalid.
Register at locationiq.com and pass your API key as key=YOUR_API_KEY in each request.
400 Invalid Request - No query passed The q parameter for the address is empty or missing.
Always include a non-empty q= parameter, for example q=New+York+City.
429 Too Many Requests You exceeded the rate limit of 2 requests per second or the daily quota.
Add a small delay between requests (at least 500 ms) and monitor daily usage in your dashboard.

Metadata Score Breakdown

Estimated from metadata — endpoint not independently tested

This score is estimated from observable metadata — HTTPS support, authentication model, declared CORS, and documentation reachability — because the API requires authentication or exposes no publicly testable endpoint. The five-signal breakdown is only shown for live-tested APIs.

Metadata estimate · endpoint not independently tested

Technical Specifications

Auth API Key
HTTPS REQUIRED
CORS YES
Category Geocoding
Difficulty Intermediate
Listing details not endpoint-verified

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