M
API Matrix

CitySDK API

Geocoding / No Auth Required Beginner HTTPS
Free to Use Varies (check documentation)
82 Score
Grade A
Visit Official Site Compare Alternatives

Overview

CitySDK provides open APIs for a selection of European cities, offering access to urban data such as public services, demographics, and points of interest. It is designed to help developers build city-aware applications that work across multiple European municipalities. The API is free to use and follows open data principles.

💡

Beginner Tip

CitySDK data availability varies by city, so check the documentation for which endpoints are supported in your target city before building. Start with a city that has the most complete dataset for the smoothest development experience.

Available Data

CitySDK data via REST API
JSON-formatted response data
Freely accessible without authentication

Example Response

JSON Response 
{
  "status": "success",
  "data": {
    "result": "Data from CitySDK",
    "description": "Open APIs for select European cities",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

id Unique identifier for the data layer or object within the CitySDK system.
name Human-readable name describing the layer or city feature.
geometry GeoJSON geometry object describing the shape or location of the feature.
properties Key-value pairs containing metadata specific to the city feature, such as opening hours or contact info.
updated_at ISO 8601 timestamp of the last update for this data record.

Implementation Example 

const url = "http://www.citysdk.eu/citysdk-toolkit/";
const response = await fetch(url);
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

404 Not Found for a city endpoint Not all cities implement the same set of CitySDK endpoints.
✓ Check the CitySDK documentation for the specific city to see which layers and endpoints are available.
Slow response times Some city APIs are hosted on public infrastructure with limited resources.
✓ Cache responses locally and avoid making repeated identical requests. Implement a timeout of at least 10 seconds.
Unexpected data format Different city implementations may return slightly different JSON structures.
✓ Always validate the response structure before parsing and handle optional fields gracefully with default values.

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 15/20
🔒 Security 15/15
🛠 Developer XP 15/20
✓ Reliability 7/15
Response Time 307ms

Fully tested on Apr 5, 2026

Technical Specifications

Auth No Auth
HTTPS REQUIRED
CORS UNKNOWN
Category Geocoding
Difficulty Beginner
Verified: 2026-04-07

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