x402 census · scout.hugen.tokyo · 3dca6b0ee82e · JSON

GET /scout/scholar

live

Search Semantic Scholar — 200M+ academic papers with citation graph. AI agent API for literature review and research intelligence. Accepts USDC payments on Base and Solana

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

Facts from the catalogs

Field Value

URL https://scout.hugen.tokyo/scout/scholar

Method GET

Price $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

payTo 0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60

Seller scout.hugen.tokyo

Catalogs cdp (row updated 2026-10-10)

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

Last catalog update 2026-10-10

CDP quality counters 2 calls and 2 unique payers in 30 days, last call 2026-10-10 (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 2026-10-22)

Field Value

Probed at 2026-10-22T00:29:31.613Z

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":"10000","payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","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 295 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 109

Payments 506

USDC volume $20.91

Median payment $0.01

First / last payment 2026-06-12 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "q": "large language models"
  },
  "type": "http"
 },
 "output": {
  "type": "json"
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://scout.hugen.tokyo/scout/scholar' -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/3dca6b0ee82e/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"3dca6b0ee82e"} 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 scout.hugen.tokyo.