Wikipedia & Reference APIs

Q: Is there a free Wikipedia & Reference API?

Yes. Wikipedia, Wikidata, DBpedia SPARQL endpoint and Get Started with Web3 are free to use, and WolframAlpha has a free tier alongside paid plans.

Q: Which Wikipedia & Reference APIs work without an API key?

Wikipedia, Wikidata, DBpedia SPARQL endpoint and Get Started with Web3 need no key or sign-up, so you can try them with a plain request.

Q: Can I call a Wikipedia & Reference API from front-end JavaScript?

DBpedia SPARQL endpoint and Get Started with Web3 allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.

Q: Can I use Wikipedia & Reference APIs in a commercial project?

Wikipedia, Wikidata, DBpedia SPARQL endpoint and Get Started with Web3 permit commercial use. WolframAlpha restricts it, for example to non-commercial or attributed use, so read the terms first.

Q: Which Wikipedia & Reference APIs work with AI agents?

WolframAlpha, Get Started with Web3 and Numbers API (Math.Tools) publish an OpenAPI spec for generating clients and tools.

Wikimedia's two APIs anchor this group: Wikipedia returns full article text, search and page history, while Wikidata serves the same knowledge as structured facts and relationships, both free with no key. DBpedia offers SPARQL queries over facts pulled from Wikipedia infoboxes. For computed answers rather than stored ones, WolframAlpha returns direct results and visualizations for math and factual queries on a freemium plan with an API key.

6 listings of 186 in catalogue

Table Rows

API	Pricing	Auth	Format	Free tier	Status
DBpedia SPARQL endpointSPARQL queries over facts extracted from Wikipedia infoboxes: people, places, works and their links. Data & Knowledge › Wikipedia & Reference	Free	None	JSON	10k+/day	Degraded
Get Started with Web3Bilingual Web3 lesson index, glossary lookups, search, and role-based learning paths, with source citations. Data & Knowledge › Wikipedia & Reference	Free	None	JSON	Unlimited	Live
Numbers API (Math.Tools)Answers number-theory questions (prime, palindrome, factors), converts bases and spells numbers out. Data & Knowledge › Wikipedia & Reference	Paid	API key	JSON	—	Live
WikidataStructured facts and relationships about people, places and concepts from Wikimedia's public knowledge base. Data & Knowledge › Wikipedia & Reference	Free	None	JSON	Unlimited	Live
WikipediaFull-text article content, search, metadata and page history from Wikipedia and other wikis. Data & Knowledge › Wikipedia & Reference	Free	None	JSON	Unlimited	Live
WolframAlphaComputational answer engine returning direct answers, data, and visualizations for math and factual queries. Data & Knowledge › Wikipedia & Reference	Freemium	API key		<100/day	Live

Choosing a Wikipedia & Reference API

Is there a free Wikipedia & Reference API?

Yes. Wikipedia, Wikidata, DBpedia SPARQL endpoint and Get Started with Web3 are free to use, and WolframAlpha has a free tier alongside paid plans.

Which Wikipedia & Reference APIs work without an API key?

Wikipedia, Wikidata, DBpedia SPARQL endpoint and Get Started with Web3 need no key or sign-up, so you can try them with a plain request.

Can I call a Wikipedia & Reference API from front-end JavaScript?

DBpedia SPARQL endpoint and Get Started with Web3 allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.

Can I use Wikipedia & Reference APIs in a commercial project?

Wikipedia, Wikidata, DBpedia SPARQL endpoint and Get Started with Web3 permit commercial use. WolframAlpha restricts it, for example to non-commercial or attributed use, so read the terms first.

Which Wikipedia & Reference APIs work with AI agents?

WolframAlpha, Get Started with Web3 and Numbers API (Math.Tools) publish an OpenAPI spec for generating clients and tools.

More in Data & Knowledge: Dictionaries APIs · Books APIs · Academic APIs · Open Government Data APIs · Economic Data APIs · Census & Demographics APIs · Datasets APIs · Education APIs