# Wikidata Facts

Entities, country, city and person profiles, identifier lookups and same-as links from Wikidata.

## How to pay

Machine-payable over x402. USDC on: Base (eip155:8453), Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp), Polygon (eip155:137), Arbitrum One (eip155:42161).
No accounts. No API keys. No signup. The paying wallet is the account.

## Machine-readable

- OpenAPI: https://wikidata-facts.x402tookit.com/openapi.json
- x402 manifest: https://wikidata-facts.x402tookit.com/.well-known/x402
- Catalog (free): https://wikidata-facts.x402tookit.com/catalog
- Health (free): https://wikidata-facts.x402tookit.com/health
- Uptime (free): https://wikidata-facts.x402tookit.com/uptime

## Endpoints (8)

### GET /country-profile — $0.04
Country profile from Wikidata: capital, population, area, languages, currency, leaders, ISO codes, borders, with property ids.
Params: country: string, hint?: string
Example: https://wikidata-facts.x402tookit.com/country-profile?country=France

### GET /entity-facts — $0.03
Facts for one Wikidata entity: label, description, aliases, instance-of, Wikipedia links and key identifiers.
Params: id: string, hint?: string
Example: https://wikidata-facts.x402tookit.com/entity-facts?id=Q90

### GET /entity-search — $0.03
Search Wikidata by name; returns candidate Q-ids with descriptions and instance-of hints to disambiguate.
Params: q: string, language?: string, limit?: integer, hint?: string
Example: https://wikidata-facts.x402tookit.com/entity-search?q=Mercury&limit=5

### GET /identifier-lookup — $0.03
Find the Wikidata entity for an ISBN, ORCID, IMDb id, ISO code, VIAF, GeoNames id or DOI, with check-digit validation.
Params: type: string, value: string
Example: https://wikidata-facts.x402tookit.com/identifier-lookup?type=iso-alpha2&value=FR

### GET /person-profile — $0.04
Profile of a notable person with a Wikipedia article: birth, death, occupation, citizenship, identifiers. Never private people.
Params: person: string, hint?: string
Example: https://wikidata-facts.x402tookit.com/person-profile?person=Albert+Einstein

### GET /place-profile — $0.04
City or place profile from Wikidata: coordinates, population, country, elevation, time zone, with property ids.
Params: place: string, hint?: string
Example: https://wikidata-facts.x402tookit.com/place-profile?place=Denver&hint=Colorado

### GET /property-value — $0.03
All values of one Wikidata property (for example P1082 population) on an entity, with ranks and dates.
Params: id: string, property: string, hint?: string
Example: https://wikidata-facts.x402tookit.com/property-value?id=Q90&property=P1082

### GET /same-as — $0.02
Same-as links for a Wikidata entity: VIAF, ISNI, GND, Library of Congress, GeoNames, Wikipedia editions, exact-match URLs.
Params: id: string, hint?: string
Example: https://wikidata-facts.x402tookit.com/same-as?id=Q937

## Terms

Facts come from Wikidata (CC0), a crowd-edited knowledge graph, and local computation, provided as is. Values can be missing, stale, disputed or vandalised, and a name can match the wrong entity; every answer states missing values rather than guessing. Person profiles cover only people with Wikipedia articles. Not legal, medical or investment advice, and not affiliated with Wikimedia.