Free Knowledge & Reference API
Wikipedia article summaries, full-text search and the daily featured-content feed; English dictionary definitions with phonetics; and a searchable directory of universities worldwide — one key for all of it.
Endpoints
| Method | Endpoint | Description | Source |
|---|---|---|---|
GET |
/api/v1/knowledge/wikipedia/summary?title=Albert Einstein |
Article summary, image and link | Wikipedia |
GET |
/api/v1/knowledge/wikipedia/search?q=quantum computing&limit=10 |
Full-text article search | Wikipedia |
GET |
/api/v1/knowledge/wikipedia/daily-feed?date= |
Today's featured article, in-the-news links and on-this-day facts | Wikipedia |
GET |
/api/v1/knowledge/dictionary?word=hello |
English word definitions, phonetics and parts of speech | dictionaryapi.dev |
GET |
/api/v1/knowledge/universities?name=&country= |
Search universities by name and/or country | Hipolabs Universities API |
Full request/response details for every endpoint are in the API documentation.
Example request
curl "https://freeopenapi.dev/api/v1/knowledge/wikipedia/summary?title=Albert+Einstein" \
-H "X-Api-Key: YOUR_API_KEY"
Works the same with ?apiKey=... as a query parameter. Every response carries
X-RateLimit-Limit / X-RateLimit-Remaining headers so you can track your budget.
Frequently asked questions
Is the Wikipedia and dictionary API really free?
Yes. The free tier includes 100 requests per day and only requires a verified email address — no credit card. Paid Pro and Business tiers raise the daily limit.
What does the daily feed contain?
Wikipedia's featured article of the day, current in-the-news items and on-this-day historical facts, for any date.
Which languages does the dictionary support?
The dictionary endpoint currently covers English definitions, with phonetics and per-part-of-speech meanings.
How do I get an API key?
Request a key with your email address on the Docs page, click the confirmation link we send you, and your key is active immediately on the free tier.