# Wikidata

**Canonical:** https://apis.io/providers/wikidata/  
**Website:** https://www.wikidata.org/  
**APIs profiled:** 9

Wikidata is a free, collaborative, multilingual knowledge graph hosted by the Wikimedia Foundation. It provides structured linked data for Wikipedia and other Wikimedia projects, as well as a public platform for anyone to read and edit. Wikidata exposes several APIs including a Wikibase REST API for entity read/write operations, the MediaWiki Action API for batch entity retrieval and editing, a SPARQL endpoint for complex graph queries, Linked Data URIs for individual entity access in multiple RDF formats, a real-time Server-Sent Events stream for change monitoring, and full database dumps for bulk data processing.

## Kin Score — 56.0 / 100 (strong)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.4 from 55.6).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 72.7 |
| Governance | 28.8 |
| Contract Governance | 28.8 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 42.9 |
| Commercial Clarity | 34.2 |
| Access Clarity | 34.2 |

Regulatory layer — **Government & Public Sector**: 75.9 (matched via tags).

## Agent readiness — 35.0 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (9)

- **MediaWiki Action API** — The MediaWiki Action API provides batch entity retrieval, editing, and search for Wikidata via wbgetentities, wbsearchentities, wbeditentity, and other actions. Supports up to 5...
- **SPARQL Query Service** — The Wikidata Query Service provides a SPARQL 1.1 endpoint at query.wikidata.org for running complex graph queries over the full Wikidata knowledge base. Supports federated queri...
- **Linked Data Interface** — The Wikidata Linked Data Interface provides individual entity data via content negotiation at http://www.wikidata.org/entity/{QID}. Supports JSON, JSON-LD, RDF/XML, Turtle, and ...
- **Recent Changes Event Stream** — The Wikimedia Event Stream provides real-time Server-Sent Events (SSE) for Wikidata changes, revision creations, and page events. Available at stream.wikimedia.org. Ideal for mo...
- **Wikidata Descriptions API** — Description management
- **Wikidata Items API** — Wikidata item (Q-entity) operations
- **Wikidata Labels API** — Label management
- **Wikidata Properties API** — Wikidata property (P-entity) operations
- **Wikidata Statements API** — Statement (claim) operations

## Agentic access (1)

- **Wikidata Agentic Access** — 11 operations · 5 acting

## Security (3)

- **Wikidata Authentication** — apiKey/oauth2 · 2 schemes
- **Wikidata Domain Security** — TLSv1.3 · HSTS · DMARC
- **Wikidata Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Wikidata Plans Pricing**

## Use cases (7)

- **Knowledge Graph Augmentation** — Enrich private datasets with structured Wikidata facts — entities, dates, relationships — via item and SPARQL queries.
- **Fact-Checking and Verification** — Retrieve canonical statements with references to verify biographical, geographic, or scientific claims in text.
- **Wikipedia Infobox Data** — Power Wikipedia infoboxes and sister-project templates with live Wikidata entity data via the MediaWiki Action API.
- **NLP Entity Linking** — Resolve named entities from natural language to Wikidata Q-IDs using wbsearchentities and SPARQL label lookups.
- **Semantic Search** — Build ontology-aware search systems using Wikidata's P31 (instance of) and P279 (subclass of) property hierarchies.
- **Change Monitoring** — Track real-time edits to Wikidata entities relevant to a domain using the SSE event stream.
- **Linked Open Data Publishing** — Publish organizational data as Linked Open Data by aligning custom schemas to Wikidata properties and Q-IDs.

## Tags

Knowledge Graph, Linked Data, Open Data, Semantic Web, SPARQL, Wikipedia

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/wikidata/). Scores are computed from the provider's own public artifacts under a published rubric.