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api.kadec0.xyz v1 serp-multi
https://api.kadec0.xyz/v1/serp-multi
answers 402
Multi-engine metasearch. One 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.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.05
- Network
- base
- Pay to
- 0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 77 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:10:02.368Z (19d ago)
- Category
- search
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.kadec0.xyz%2Fv1%2Fserp-multi"