Multi-Engine Web Search
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.
Offering
- Provider
- api.kadec0.xyz
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Web Search Research
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://api.kadec0.xyz/v1/serp-multi- MIME type
- application/json
- First seen
- 2026-10-16T01:50:06.715Z
- Last seen
- Tags
- Search, web-search, serp, metasearch, multi-engine
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.05 USDC
Atomic price: 50000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "50000",
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA"
}
]Observed health
- Status
- Healthy
- Latest latency
- 130 ms
- Average latency
- 156 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 7 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET",
"HEAD",
"DELETE"
]
},
"queryParams": {
"type": "object",
"properties": {
"q": {
"type": "string",
"description": "search query"
},
"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"
},
"num_results": {
"type": "string",
"default": "10",
"description": "max results per engine, cap 25"
},
"region": {
"type": "string",
"default": "us-en",
"description": "locale, e.g. us-en, uk-en, de-de"
},
"timelimit": {
"type": "string",
"enum": [
"d",
"w",
"m",
"y"
],
"description": "restrict to past day/week/month/year"
},
"safesearch": {
"type": "string",
"enum": [
"on",
"moderate",
"off"
],
"default": "moderate"
},
"mode": {
"type": "string",
"enum": [
"web",
"news"
],
"default": "web"
}
},
"required": [
"q",
"engines"
]
}
},
"required": [
"type",
"method"
],
"additionalProperties": false
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"engines": {
"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",
"type": "string"
},
"mode": {
"default": "web",
"enum": [
"web",
"news"
],
"type": "string"
},
"num_results": {
"default": "10",
"description": "max results per engine, cap 25",
"type": "string"
},
"q": {
"description": "search query",
"type": "string"
},
"region": {
"default": "us-en",
"description": "locale, e.g. us-en, uk-en, de-de",
"type": "string"
},
"safesearch": {
"default": "moderate",
"enum": [
"on",
"moderate",
"off"
],
"type": "string"
},
"timelimit": {
"description": "restrict to past day/week/month/year",
"enum": [
"d",
"w",
"m",
"y"
],
"type": "string"
}
},
"required": [
"q",
"engines"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}