# Wikidata on Onekey

> 7 endpoints for Wikidata (7 stable, 0 beta), 1 to 5 credits each. Category: Knowledge & reference. One key, one JSON shape.

Base URL: https://api.onekey.dev
Auth: header `x-api-key: <key>`. Call shape: `GET /v1/{platform}/{endpoint}?{params}`.
Every response is `{success, data, metadata, error}`; check `success` first. Cost is in `metadata.credits_charged`. Free when served from cache (0.2 credit for a cached response over 100 KB). Failed and not-found calls are refunded.
Status: stable = verified against the live source; beta = not yet verified, fields may be missing.

Page: https://onekey.dev/platforms/wikidata
Reference (Markdown): https://onekey.dev/docs/api/wikidata.md
All docs: https://onekey.dev/llms.txt

## Canonical fields returned

Unified-schema fields (same names on every platform), with how many of the 7 mapped Wikidata endpoints return each:

- `entity.id` (string): 6
- `entity.name` (string): 5
- `entity.description` (string): 4
- `content.title` (string): 1
- `content.url` (URL): 1
- `entity.stats.rank` (integer): 1
- `entity.url` (URL): 1
- plus 3 platform-specific fields under `ext.`

## Endpoints

### wikidata.entity

Wikidata item: id, English label and description.
- Price: 1 credit per fresh call. Status: stable. Returns: one record.
- Request: `GET https://api.onekey.dev/v1/wikidata/entity?id=Q42` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `id` (string, required): Wikidata item id, e.g. Q42
- Fields returned: `entity.id`, `entity.name`, `entity.description`
- Reference: https://onekey.dev/docs/api/wikidata/entity.md

### wikidata.instance_of

Wikidata 'instance of' (P31) statements of an item.
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/wikidata/instance_of?id=Q42` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `id` (string, required): Wikidata item id, e.g. Q42
- Fields returned: `entity.id`, `entity.stats.rank`, `ext.property`
- Reference: https://onekey.dev/docs/api/wikidata/instance_of.md

### wikidata.property

Wikidata property: id, label, description and datatype.
- Price: 1 credit per fresh call. Status: stable. Returns: one record.
- Request: `GET https://api.onekey.dev/v1/wikidata/property?id=P31` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `id` (string, required): Wikidata property id, e.g. P31
- Fields returned: `entity.id`, `entity.name`, `entity.description`, `ext.dataType`
- Reference: https://onekey.dev/docs/api/wikidata/property.md

### wikidata.search

Search Wikidata items by label.
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/wikidata/search?q=douglas%20adams` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `q` (string, required): Search query
- Fields returned: `entity.id`, `entity.name`, `entity.description`, `entity.url`
- Reference: https://onekey.dev/docs/api/wikidata/search.md

### wikidata.search_property

Search Wikidata properties by label.
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/wikidata/search_property?q=instance%20of` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `q` (string, required): Search query
- Fields returned: `entity.id`, `entity.name`, `entity.description`
- Reference: https://onekey.dev/docs/api/wikidata/search_property.md

### wikidata.sitelinks

Wikipedia sitelinks (English) of a Wikidata item.
- Price: 1 credit per fresh call. Status: stable. Returns: one record.
- Request: `GET https://api.onekey.dev/v1/wikidata/sitelinks?id=Q42` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `id` (string, required): Wikidata item id, e.g. Q42
- Fields returned: `content.title`, `content.url`
- Reference: https://onekey.dev/docs/api/wikidata/sitelinks.md

### wikidata.sparql

Run a read-only SPARQL SELECT on Wikidata (variables ?item, ?itemLabel, ?value).
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/wikidata/sparql?q=SELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%20%3Fitem%20wdt%3AP31%20wd%3AQ146%20.%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22en%22%20%7D%20%7D%20LIMIT%203` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `q` (string, required): SPARQL SELECT query (<=250 chars)
- Fields returned: `entity.id`, `entity.name`, `ext.value`
- Reference: https://onekey.dev/docs/api/wikidata/sparql.md

## Sample request

```bash
curl "https://api.onekey.dev/v1/wikidata/entity?id=Q42" \
  -H "x-api-key: YOUR_API_KEY"
```