{"uid":"cap_0lVaIKqF-Kg6dpkvQU-wa","slug":"web-search-autocomplete-api-919cf73a","name":"Web Search Autocomplete API","description":"40+ public web-data, SERP, e-commerce, real-estate, finance and AI-search APIs, payable per call over x402 (USDC on Base, Polygon, Arbitrum). No account or API key required. Most endpoints $0.003; AI-model endpoints $0.005.","url":"https://x402.openwebninja.com/web-search-autocomplete/autocomplete","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"required":{"type":"string"},"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_jLw6iovSJPh8nvXHuUoXw","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns real-time search query suggestions with Knowledge Graph entity enrichment for a given partial query string","exampleAgentPrompt":"Can you fetch autocomplete suggestions for the query 'eiffel' in the US region in English for a desktop user, including any Knowledge Graph entity titles and images?","exampleUseCases":null,"resultDescription":"An array of autocomplete suggestion objects, each containing the suggested query string, character highlight ranges (offset and length) for bolding matched text, and optional Knowledge Graph fields: entity title, subtitle, primary image URL, and additional image URLs. Also includes a status field.","failureModes":["Missing required 'query' parameter returns an error","Invalid 'user_agent' enum value (not 'desktop' or 'mobile') causes rejection","Unsupported region or language codes may return empty suggestions","Payment not provided or insufficient USDC balance results in 402 Payment Required","Rate limiting or quota exceeded may return 429 or error response","Network timeout if upstream search provider is slow"],"whenToPreferThis":"Use this endpoint when you need real-time search query autocomplete suggestions with Knowledge Graph entity enrichment (images, titles, subtitles) for a given partial text input, particularly when building search UIs or agent search flows that need instant, per-keystroke query predictions with rich entity metadata. Prefer this over generic text completion or NLP APIs when the goal is specifically web-search-style typeahead behavior.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:41:35.815Z","isFirstParty":false}