City, Helsinki API

Free to Use Varies (check documentation)

Overview

Helsinki Region Infoshare (HRI) is a free open data portal providing datasets from Helsinki and surrounding cities in Finland. You can access information on population, transport, culture, environment, and city services without any authentication. It is a great resource for developers building civic apps or researching Nordic urban data.

💡

Beginner Tip

Use the CKAN-compatible API at hri.fi/api/3/action/package_search to search datasets in English; many datasets from Helsinki are well-documented and available in JSON format.

Available Data

Use case: Integrate helsinki(fi) city open data data into web and mobile applications
City, Helsinki data via REST API
JSON-formatted response data
Freely accessible without authentication

Example Response

JSON Response
{
  "status": "success",
  "data": {
    "result": "Data from City, Helsinki",
    "description": "Helsinki(FI) City Open Data",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

success True if the CKAN API call succeeded
result.count Total number of datasets matching your search query
result.results Array of dataset metadata objects returned for the current page
title Display title of the dataset, which may be in Finnish, Swedish, or English
resources List of downloadable files associated with the dataset, with url, format, and size fields
tags Keywords associated with the dataset to help with categorization and search

Implementation Example

const url = "https://hri.fi/en_gb/";
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

Dataset only available in Finnish or Swedish Some HRI datasets have metadata and files only in Finnish or Swedish
Filter your search using the language parameter or look for datasets tagged with en to find English-friendly resources
Resource URL returns 404 Open data file URLs change when datasets are updated or moved
Always resolve the current resource URL from the package metadata API rather than bookmarking file download links
Large file download times out Some geographic or population datasets are very large files (100MB+)
Check the resource file size in the metadata before downloading and consider paginated API endpoints where available

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 10/20
🔒 Security 15/15
🛠 Developer XP 15/20
✓ Reliability 7/15
Response Time 790ms

Fully tested on Apr 5, 2026

Technical Specifications

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

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