x402 census · startup.use.x402atlas.com · a51e9bc7dbb5 · JSON
GET /startup-domain-check/advanced
live
Advanced startup name check: domains across 13 TLDs, GitHub, npm, PyPI, X, YouTube and Instagram handles, available .com name variants, notable Wikidata name collisions, plus ready-to-call links for App Store, Google search and EU trademark checks.
Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://startup.use.x402atlas.com/startup-domain-check/advanced |
| Method | GET |
| Price | $0.06 USDC = 60000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base); also accepts eip155:137, eip155:42161, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| payTo | 0x28410EaC7393dba041cd5a92eEfe7a8E834310bb |
| Seller | startup.use.x402atlas.com |
| Catalogs | cdp (row updated 2026-10-23) |
| Listed since (lower bound) | 2026-10-23 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-10-23 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-10-23 (catalog-reported, not verified on chain) |
| Category (keyword rule) | web-search |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | Advanced Startup Name Check · startup, domain, availability, username, brand |
Unpaid probe (census of 2026-10-25)
| Field | Value |
|---|---|
| Probed at | 2026-10-25T21:15:49.795Z |
| HEAD | 405 |
| GET | 402 |
| Verdict | live live: valid 402 to an unpaid GET |
| 402 carried in | header+body |
| x402Version in the 402 | 2 |
| accepts[0] | {"scheme":"exact","network":"eip155:8453","amount":"60000","payTo":"0x28410EaC7393dba041cd5a92eEfe7a8E834310bb","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 / n/a / none |
| Latency | 286 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 | 5 |
| Payments | 5 |
| USDC volume | $0.12 |
| Median payment | $0.02 |
| First / last payment | 2026-08-24 / 2026-09-17 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x28410EaC7393dba041cd5a92eEfe7a8E834310bb |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"queryParams": {
"query": "Quill Nest"
},
"type": "http"
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 2631
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://startup.use.x402atlas.com/startup-domain-check/advanced' -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/a51e9bc7dbb5/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"a51e9bc7dbb5"} 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 startup.use.x402atlas.com.