Overview
GraphHopper is a routing API that calculates optimized A-to-B directions with turn-by-turn instructions for driving, cycling, and walking. It supports multiple transport profiles and can handle route optimization for multiple waypoints. A free tier is available with a generous daily quota, making it great for learning and small projects.
Beginner Tip
Get a free API key at https://www.graphhopper.com/ and use the /route endpoint with point parameters in "lat,lon" format. The free tier allows 500 requests per day, which is plenty for experimentation.
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.
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.
{
"route": "Line 1",
"origin": "Station A",
"destination": "Station B",
"departure": "08:30",
"arrival": "09:15",
"status": "On Time",
"delays_min": 0
} Field Reference
paths[].distance Total route distance in meters. paths[].time Estimated travel time in milliseconds. paths[].points GeoJSON LineString or encoded polyline of the full route geometry. paths[].instructions Array of turn-by-turn instructions with text, distance, and sign values for navigation. paths[].legs Individual route segments when multiple waypoints are provided, each with their own distance and time. info.took Server-side processing time in milliseconds for performance monitoring. Implementation Example
Calls a real endpoint of this API. Replace any placeholder credentials with your own key.
const url = "https://docs.graphhopper.com/";
// 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.
Metadata Score Breakdown
Estimated from metadata — endpoint not independently tested
Metadata estimate · endpoint not independently tested
Technical Specifications
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