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Wikipedia Fact Lookup API
x402
Wikipedia Fact Lookup API is a paid API for AI agents from freetier-agent-api.pages.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-11-01).
Returns the best-matching Wikipedia article summary, description, URL, and structured Wikidata facts for a given entity or topic query.
Price / call$0.005
Success—
StatusUnknown
How this service works
Invoice-to-JSON, on-chain tools (transaction explainer + payment check, wallet profile, contract ABI, ERC-20 token risk), company contacts and web-to-RAG for AI agents. Pay per call with x402 (USDC on Base). No signup, no API key.
Output
A JSON object containing the best-matching Wikipedia article title, a short description, the article URL, and a structured facts object with available Wikidata properties such as founder(s), inception date, official website, headquarters, CEO, industry, employee count, stock ticker, population, and geographic coordinates.
Example use cases
Company research for due diligence
“Pull up the Wikipedia facts for Stripe — I need the founding date, founders, headquarters, industry, and their official website for a background report.”
City population and coordinates lookup
“What does Wikipedia say about Tokyo? I need the population and geographic coordinates for a mapping project.”
Biography fact check for article
“Look up the Wikipedia entry for Elon Musk and give me his birth date, nationality, and any structured facts available.”
Technical details
Endpoint
GEThttps://freetier-agent-api.pages.dev/api/wiki-fact?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, encyclopedic facts about a real-world entity — companies, cities, people, or organizations — and want both a human-readable Wikipedia summary and machine-readable Wikidata fields in a single call. Prefer this over raw Wikipedia scraping when you need structured fields like founder, CEO, ticker, or coordinates without parsing. Prefer over general web search when authoritative, structured reference data is needed rather than recent news or opinions.
Side effects
- No matching Wikipedia article found for the query — returns empty or error response
- Ambiguous query matches unintended article — result may be off-topic
- Wikidata facts may be incomplete if the entity has sparse structured data
- Non-English language codes may have less structured Wikidata coverage
- Rate limiting or payment failure (x402) blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://en.wikipedia.org/wiki/Coinbase",
"facts": {
"founder": [
"Brian Armstrong",
"Fred Ehrsam"
],
"inception": "2012-06-20",
"officialWebsite": "https://www.coinbase.com"
},
"title": "Coinbase",
"description": "American cryptocurrency exchange"
}
}Tags
x402
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