x402 census · seo.openverbs.com · 6db612dc8ca3 · JSON

POST /v1/keyword-volume-history

live

Keyword volume history API: get Google monthly search volume history for a list of keywords, back to 2019: a per-keyword month-by-month search-volume time series plus current CPC and competition. For spotting seasonality, demand trends and momentum that a single keyword-overview snapshot misses. Up to 10 keywords per call; unknown keywords are omitted.

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

Facts from the catalogs

Field Value

URL https://seo.openverbs.com/v1/keyword-volume-history

Method POST

Price $0.15 USDC = 150000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A

Seller seo.openverbs.com

Catalogs cdp (row updated 2026-10-25)

Listed since (lower bound) 2026-10-25 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-25

CDP quality counters 8 calls and 3 unique payers in 30 days, last call 2026-10-25 (catalog-reported, not verified on chain)

Category (keyword rule) other/unknown

Templated path no

x402Version in catalog 2

Service name / tags · historical search volume api, keyword search volume history, monthly search volume, keyword seasonality, search volume trend

Unpaid probe (census of 2026-10-22)

Field Value

Probed at 2026-10-22T00:26:09.137Z

HEAD 402

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"150000","payTo":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","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 Payment id="ncs21-O9tQSupWRskWb1UPLGcEF7

Content type / server / CORS application/problem+json / n/a / none

Latency 50 ms

Error Payment is required (Keyword volume history API: get Google monthly search volume history for a list of keywords, back t

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 5

Payments 197

USDC volume $1.35

Median payment $0.01

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

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "keywords": [
    "example"
   ],
   "languageCode": "US",
   "locationCode": 1
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "results": [
    {
     "competition": 0.6,
     "competitionLevel": "MEDIUM",
     "cpc": 0.78,
     "history": [
      {
       "date": "2024-01",
       "volume": 246000
      },
      {
       "date": "2024-02",
       "volume": 301000
      }
     ],
     "keyword": "running shoes",
     "volume": 301000
    }
   ],
   "total": 1
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://seo.openverbs.com/v1/keyword-volume-history' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'

The catalog declares POST. 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/6db612dc8ca3/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"6db612dc8ca3"} 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 seo.openverbs.com.