Overview
The CTS (Compagnie des Transports Strasbourgeois) API provides real-time transit data for the Strasbourg, France public transport network including trams and buses. You need an API key from CTS to access live arrival predictions and vehicle positions. It is ideal for developers building local transit apps for the Strasbourg region.
Beginner Tip
Request an API key directly from CTS via their developer portal at https://api.cts-strasbourg.eu/. The API follows SIRI-Lite standards, so queries use XML-like parameters — use the Swagger UI in the docs to understand the request format before writing code.
Available Data
Example Response
{
"route": "Line 1",
"origin": "Station A",
"destination": "Station B",
"departure": "08:30",
"arrival": "09:15",
"status": "On Time",
"delays_min": 0
} Field Reference
MonitoringRef The stop reference identifier used to query real-time arrivals. MonitoredVehicleJourney.LineRef The line identifier for the vehicle journey (e.g., tram line A or bus line 10). MonitoredVehicleJourney.DestinationName The final destination displayed on the vehicle for this journey. MonitoredCall.ExpectedArrivalTime Real-time predicted arrival time at the monitored stop in ISO 8601 format. MonitoredCall.AimedArrivalTime Scheduled (timetabled) arrival time at the stop, for comparison with the real-time prediction. Implementation Example
const url = "https://api.cts-strasbourg.eu/";
// 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
Matrix Score Breakdown
Partially tested on Apr 5, 2026
Technical Specifications
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