x402 census · x402-datashop-production.up.railway.app · 81e68ae74f33 · JSON

GET /v1/dev/hn-top

live

Current Hacker News front page via the official Firebase API, fanned out and merged into one payload: id, title, url, score, comment count and age in minutes per story. Query: ?n=20 (1-30 stories) &min_score=100 (optional score floor). Real-time tech signal for launch/incident/buzz detection. 5min cache.

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

Facts from the catalogs

Field Value

URL https://x402-datashop-production.up.railway.app/v1/dev/hn-top

Method GET

Price $0.002 USDC = 2000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x6ab8efe305cce67daa48c97bde29c04402822dff

Seller x402-datashop-production.up.railway.app

Catalogs cdp (row updated 2026-10-11)

Listed since (lower bound) 2026-10-11 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-11

CDP quality counters 5 calls and 3 unique payers in 30 days, last call 2026-10-11 (catalog-reported, not verified on chain)

Category (keyword rule) trading-signals

Templated path no

x402Version in catalog 2

Service name / tags eu-verify · hackernews, tech, news, trending, developer

Unpaid probe (census of 2026-10-22)

Field Value

Probed at 2026-10-22T00:31:51.868Z

HEAD 404

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":"2000","payTo":"0x6ab8efe305cce67daa48c97bde29c04402822dff","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 / railway-hikari / none

Latency 128 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 27

Payments 79

USDC volume $0.36

Median payment $0.005

First / last payment 2026-07-16 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x6ab8efe305cce67daa48c97bde29c04402822dff (contract: EIP7702Proxy)

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "min_score": 100,
   "n": 10
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "count": 2,
   "source": "Hacker News official Firebase API (live front page)",
   "stories": [
    {
     "age_min": 254,
     "comments": 141,
     "id": 48888518,
     "score": 312,
     "title": "Show HN: A fast SQLite VFS",
     "url": "https://example.dev/sqlite-vfs"
    },
    {
     "age_min": 402,
     "comments": 87,
     "id": 48888193,
     "score": 205,
     "title": "PostgreSQL 19 released",
     "url": "https://postgresql.org/19"
    }
   ]
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://x402-datashop-production.up.railway.app/v1/dev/hn-top' -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/81e68ae74f33/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"81e68ae74f33"} 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 x402-datashop-production.up.railway.app.