{"uid":"cap_J9mtgMOsqwlxVNrrhGAl3","slug":"multi-engine-metasearch-serp-multi-d8419a76","name":"Multi-Engine Metasearch (SERP Multi)","description":"Multi-engine web search (metasearch). One search query fanned out across 2-3 search engines (Brave, Yahoo, Yandex) with results deduplicated by URL and merged by reciprocal-rank fusion: consensus ranking across engines instead of one engine's bias, with per-engine rank attribution on every result.","url":"https://api.kadec0.xyz/v1/serp-multi","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["q","engines"],"properties":{"q":{"type":"string","description":"search query"},"mode":{"enum":["web","news"],"type":"string","default":"web"},"region":{"type":"string","default":"us-en","description":"locale, e.g. us-en, uk-en, de-de"},"engines":{"type":"string","description":"comma list of 2-3 engines: yahoo, yandex (web mode). news mode has a single live engine (bing), so multi-engine is web-only"},"timelimit":{"enum":["d","w","m","y"],"type":"string","description":"restrict to past day/week/month/year"},"safesearch":{"enum":["on","moderate","off"],"type":"string","default":"moderate"},"num_results":{"type":"string","default":"10","description":"max results per engine, cap 25"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iCNIivRvP6kYGaKlZJyTL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fans out a single query across 2-3 search engines (Brave, Yahoo, Yandex) and returns deduplicated, consensus-ranked results via reciprocal-rank fusion with per-engine rank attribution.","exampleAgentPrompt":"Search for 'best open-source LLM frameworks 2024' using Brave, Yahoo, and Yandex in web mode with moderate safesearch, limited to the past month, returning up to 10 results per engine — and show me a deduplicated consensus ranking across all three.","exampleUseCases":null,"resultDescription":"A deduplicated list of web results ranked by reciprocal-rank fusion across the requested engines, each result carrying its title, URL, snippet, and per-engine rank attribution showing which engines surfaced it and at what rank.","failureModes":["Invalid engine name supplied — only brave, yahoo, yandex (web) or bing, yahoo (news) are valid","Fewer than 2 engines specified — minimum is 2","num_results exceeds cap of 25 per engine","Invalid timelimit value — must be d, w, m, or y","Region/locale format not recognized","Payment not received or insufficient — x402 payment required","One or more upstream engines temporarily unavailable, reducing result coverage"],"whenToPreferThis":"Use this endpoint when you need unbiased, consensus-ranked web search results that reduce the influence of any single engine's ranking algorithm. It is the right choice when completeness and coverage matter — catching results that one engine might bury or omit. Prefer it over the single-engine SERP endpoint when query quality and diverse ranking perspectives outweigh the slightly higher cost and latency of fanning out to multiple engines. Especially valuable for research, fact-checking, or any task where search bias is a concern.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:45:04.562Z","isFirstParty":false}