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API · /wikidata-api

Wikidata API

healthy 4,863 Subscribers

The Wikidata structured knowledge graph as an API — the free, collaborative, multilingual knowledgebase that underpins Wikipedia and thousands of apps, powered by the official Wikidata action API. Search the knowledge graph by text to find entities and their Q-ids; read an entity for its label, description, aliases, a summary of its statements (each property with sample values), sitelink count and Wikipedia link; fetch the full claims for a property of an entity (values, ranks, qualifiers); resolve up to 50 Q/P ids to human-readable labels and descriptions in a single call; and look up any property's label, description and datatype. Covers tens of millions of items — people, places, organisations, works, species, events and concepts — in any language. Ideal for knowledge-graph and fact-lookup tools, entity linking and disambiguation, data enrichment, semantic search and research apps. Data is CC0.

#wikidata #knowledge-graph #entities #semantic #linked-data #reference #data
api.oanor.com/wikidata-api
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Machine-readable spec so AI agents can integrate this API.

/api/wikidata-api/openapi.json
/api/wikidata-api/llms.txt

Discovery: GET /api/index.json lists every API.

Wikidata API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
303 ms
Server probes · 24h
Subscribers
4,863
active
Total calls
114
last 7 days
status Full status page → · 18 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 1,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,000 calls/month
  • 2 req/sec
  • Search, entities & labels
  • No credit card
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Starter

€6.50 /month

  • 35,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 35k calls/month
  • 8 req/sec
  • Claims & label resolution
  • Email support
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Pro

€19.50 /month

  • 150,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 150k calls/month
  • 20 req/sec
  • Entity linking & enrichment
  • Priority support
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Mega

€54.00 /month

  • 600,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 600k calls/month
  • 50 req/sec
  • High-volume knowledge graph
  • Dedicated SLA
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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Wikidata API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Wikidata API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Wikidata API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Wikidata API cost?
Wikidata API has a free tier with 100 calls / month. Paid plans start at €6.50 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Wikidata API GDPR-compliant?
All requests to Wikidata API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/wikidata-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/wikidata-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/wikidata-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/wikidata-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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