x402 census · api.kadec0.xyz · e43da96ca4f4 · JSON

GET /v1/serp

live

Web search results (SERP). Keyless web search returning ranked title, URL, and snippet for a query — with locale/region targeting, freshness filters (past day, week, month, year), pagination, a news mode that adds publish date and source, and selectable backend engine (auto rotation, or pin Brave, Yahoo, or Yandex).

Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.

Facts from the catalogs

Field Value

URL https://api.kadec0.xyz/v1/serp

Method GET

Price $0.05 USDC = 50000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA

Seller api.kadec0.xyz

Catalogs cdp (row updated 2026-09-29)

Listed since (lower bound) 2026-09-29 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-29

CDP quality counters 574 calls and 15 unique payers in 30 days, last call 2026-09-29 (catalog-reported, not verified on chain)

Category (keyword rule) web-search

Templated path no

x402Version in catalog 2

Service name / tags Web Search (SERP) · search, web-search, web, serp, search-results

Unpaid probe (census of 2026-09-30)

Field Value

Probed at 2026-09-30T23:12:06.480Z

HEAD 405

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header+body

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"50000","payTo":"0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Live payTo equals catalog payTo yes

extensions.bazaar in the 402 yes

PAYMENT-REQUIRED header yes

WWW-Authenticate offer none

Content type / server / CORS application/json / cloudflare / none

Latency 5,763 ms

Error Payment required

No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.

On-chain facts for the payTo (public address)

Field Value

Distinct payers 110

Payments 363

USDC volume $5.56

Median payment $0.01

First / last payment 2026-06-22 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "num_results": "10",
   "q": "best python web scraping library"
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "count": 1,
   "items": [
    {
     "rank": 1,
     "snippet": "Learn how to scrape data...",
     "title": "Python Web Scraping Tutorial",
     "type": "search_result",
     "url": "https://example.com/tutorial"
    }
   ]
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://api.kadec0.xyz/v1/serp' -H 'accept: application/json'

The catalog declares GET. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.

Paid checks (x402, USDC on Base)

GET https://bazaar.agentexchange.work/r/e43da96ca4f4/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"e43da96ca4f4"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.

Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on api.kadec0.xyz.