x402 census · argonaut-crypto-headline-pulse.vercel.app · 355df4fe29e2 · JSON
GET /api/v1/headlines
live
Fresh crypto news and source-linked Bitcoin, Ethereum, Base, and market headlines from four independent publisher feeds, with deterministic topic filtering and no generated claims.
Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://argonaut-crypto-headline-pulse.vercel.app/api/v1/headlines |
| Method | GET |
| Price | $0.007 USDC = 7000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x5e2023b1D1366d6366E768fe432AD627bfAa5d57 |
| Seller | argonaut-crypto-headline-pulse.vercel.app |
| Catalogs | payai (row updated 2026-10-14) |
| Listed since (lower bound) | 2026-10-14 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-10-14 |
| CDP quality counters | not in the CDP catalog |
| Category (keyword rule) | crypto-data |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | · fresh-crypto-news, crypto-market-news, bitcoin-news, ethereum-news, base-news |
Unpaid probe (census of 2026-10-22)
| Field | Value |
|---|---|
| Probed at | 2026-10-22T00:38:36.110Z |
| HEAD | 200 |
| 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":"7000","payTo":"0x5e2023b1D1366d6366E768fe432AD627bfAa5d57","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 / Vercel / none |
| Latency | 799 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 |
|---|---|
| Settlement history | unresolved: payTo not seen in the payer forensics (180 wallets' outbound history) or the Blockscout sample |
Declared input and output (extensions.bazaar)
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": 10,
"topic": "base"
}
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 491
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://argonaut-crypto-headline-pulse.vercel.app/api/v1/headlines' -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/355df4fe29e2/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"355df4fe29e2"} 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: PayAI listing status · this record as JSON · all resources on argonaut-crypto-headline-pulse.vercel.app.