x402 census · api.kgninja.dev · 6ddde59a560c · JSON

POST /summarize-url

live

KG-NINJA URL Summary

Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-01).

Facts from the catalogs

Field Value

URL https://api.kgninja.dev/summarize-url

Method POST

Price $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x4D7d842536De9Eb491AE2300126B3CDdE7B0aDE3

Seller api.kgninja.dev

Catalogs cdp (row updated 2026-09-28)

Listed since (lower bound) 2026-09-28 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-28

CDP quality counters 2 calls and 2 unique payers in 30 days, last call 2026-09-28 (catalog-reported, not verified on chain)

Category (keyword rule) research/reports

Templated path no

x402Version in catalog 2

Service name / tags none

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

Latest re-probe

Field Value

Re-probed at 2026-10-01T08:13:42.000Z (cron)

Verdict now live changed from unprobed

HEAD / GET 402 / 402

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"10000","payTo":"0x4D7d842536De9Eb491AE2300126B3CDdE7B0aDE3","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Latency 1,303 ms

Error none

On-chain facts for the payTo (public address)

Field Value

Distinct payers 19

Payments 29

USDC volume $0.29

Median payment $0.01

First / last payment 2026-06-29 / 2026-09-14

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x4D7d842536De9Eb491AE2300126B3CDdE7B0aDE3 (contract)

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "url": "https://example.com"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "summary": "Example summary",
   "title": "Example title"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://api.kgninja.dev/summarize-url' -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/6ddde59a560c/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"6ddde59a560c"} 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.kgninja.dev.