{"uid":"cap_NG_CjZSmYblHM5P1UTKfD","slug":"api-x402node-dev-011ff50b","name":"Wikidata Entity Search API","description":"Search Wikidata entities (structured knowledge graph). Returns entity id (Q-number), label, description, concept URI, aliases. Use ?q=YOUR_QUERY plus optional and lang=en and limit=10. Built for AI agents needing canonical entity disambiguation and Linked Data IRIs. Accepts payment on Base or Solana — either network works.","url":"https://api.x402node.dev/knowledge/wikidata","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["q"],"properties":{"q":{"type":"string","description":"Search query (required)"},"lang":{"type":"string","description":"Lang (optional)"},"limit":{"type":"string","description":"Max results (optional)"}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_BmWYp5vj9cpmAKTT4D4aC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Search Wikidata's structured knowledge graph to retrieve canonical entity IDs (Q-numbers), labels, descriptions, aliases, and Linked Data IRIs for entity disambiguation","exampleAgentPrompt":"What is the Wikidata Q-number and canonical description for 'Marie Curie'? Search in English and return up to 5 results so I can confirm the right entity.","exampleUseCases":null,"resultDescription":"Returns a JSON object containing one or more Wikidata entities, each with its Q-number (entity ID), human-readable label, short description, canonical concept URI (Linked Data IRI), and any known aliases — enabling precise entity disambiguation.","failureModes":["Query string too vague returns many unrelated entities with low confidence disambiguation","Unsupported language code returns error or falls back to English","Zero results returned when query is highly specific or misspelled","Rate limiting or payment failure returns HTTP 402 or 429","Ambiguous queries (e.g. common names) return multiple plausible entities requiring additional filtering"],"whenToPreferThis":"Use this endpoint when you need canonical Wikidata entity identifiers (Q-numbers) or Linked Data IRIs for named entity disambiguation, knowledge graph enrichment, or semantic web applications. Prefer this over free-text search when you need structured, interoperable entity references rather than prose descriptions. Ideal for AI agents that need to resolve ambiguous entity names to a single authoritative identifier before querying additional knowledge sources.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:05:41.864Z","isFirstParty":false}