Open Data APIs
Open datasets and statistics
This directory lists 35 open data APIs. 5 of them require no API key and support CORS, so you can call them directly from browser JavaScript with no backend and no sign-up. Every entry shows whether it needs authentication, serves over HTTPS and allows cross-origin requests, so you can pick one that fits your stack before you read a single doc page.
Best Open Data APIs for Developers
An open data API allows developers to access publicly available datasets from government agencies, research institutions, and international organizations. These APIs power data journalism, academic research, policy analysis, and public interest applications.
CodeHelper's curated open data API collection includes APIs covering economic indicators, social statistics, scientific measurements, geographic datasets, and public health data.
What to look for in an open data API
- Data licensing: Confirm the dataset license (Creative Commons, ODbL, public domain) before using data in commercial products.
- Indicator coverage: APIs with broad indicator coverage reduce the need to aggregate data from multiple sources.
- Update cadence: Statistical data may be updated annually, quarterly, or monthly; match the API's cadence to your application's freshness requirements.
How to use this API directory
- Browse the curated list of APIs below.
- Click any API to visit its documentation.
- Check the Auth column to understand what credentials you need.
Whether you are building a data visualization tool or a research portal, this free curated API directory saves you hours of research.