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Multi-Engine Metasearch (SERP Multi)
x402
Multi-Engine Metasearch (SERP Multi) is a paid API for AI agents from api.kadec0.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
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.
Price / call$0.05
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Example prompt
“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.”
Technical details
Endpoint
GEThttps://api.kadec0.xyz/v1/serp-multiWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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