x402 census · sellers · qr-api-production-1836.up.railway.app · JSON
qr-api-production-1836.up.railway.app live
qr-api-production-1836.up.railway.app lists 4 x402 resources in cdp; 4 answered a valid 402 to an unpaid GET, 0 are dead; prices $0.001 to $0.001; on-chain 78 payers, 327 payments, $0.49 USDC; discovery files: openapi.
Listed resources
4
POST 4
Valid 402
4 / 4
verdict live
Dead
0
none
Prices
$0.001–$0.001
median $0.001; networks base
Payers on record
78
327 payments, $0.49 USDC, last 2026-09-30
Sampler share
100.0%
payments from monitor/indexer-shaped wallets
Promote qr-api-production-1836.up.railway.app on bazaar.agentexchange.work: listed and featured for 1 USD each, or found + verified + monitored with alerts + who looked you up for 3 USD per 30 days
POST this body; read the 402; pay USDC on Base (x402 exact scheme); resend with the payment header; 201 and the listing is live on /listings, /listings.json and every store discovery file. Paying again with the same url renews it.
curl -X POST https://bazaar.agentexchange.work/listings -H 'content-type: application/json' -d '{"url":"https://qr-api-production-1836.up.railway.app/","name":"qr-api-production-1836.up.railway.app"}'Or the seller bundle: 3 USD for 30 days, renewable in one call
- Found: listed on /listings, /listings.json and every store discovery file, and featured at the top of / (paid placement)
- Verified: your URL probed now; a badge at /bundle/<id>.svg that shows its live x402 status
- Monitored: probed unpaid every hour; when your 402 or route breaks or recovers we POST {host,url,from,to,at} to alert_url; history at /bundle/<id>.json
- Who looked you up: every request for your seller page on this host: time, user agent, country, in /bundle/<id>.json
curl -X POST https://bazaar.agentexchange.work/bundle -H 'content-type: application/json' -d '{"url":"https://qr-api-production-1836.up.railway.app/","name":"qr-api-production-1836.up.railway.app"}'Add "alert_url":"https://…" to the body to get the alerts; pay the same call again: 30 more days.
Then POST https://bazaar.agentexchange.work/featured (1 USD, 30 days) puts it at the top of the front page. Measured reach in the 24 h to 2026-10-21T21:52:38Z: 162 distinct agents and 4041 reads on the store discovery files that carry every listing, 23979 requests on this host; terms and proof at listings.json.
Discovery files on the host (checked 2026-10-22)
| File | Status | Detail |
|---|---|---|
| /.well-known/x402 | absent (HTTP 404) | |
| /openapi.json | present | 7 paths, 0 operations with x-payment-info, 0 declare a 402 response |
| /llms.txt | absent (HTTP 404) | |
| /.well-known/agent-card.json | absent (HTTP 404) |
On-chain settlement facts (public payTo addresses)
78 distinct paying wallets, 327 payments, $0.49 USDC between 2026-06-11 and 2026-09-30; 100.0% of payments came from sampler-shaped wallets. Source: forensics-2026-09-30; the payTo also receives for 10 other hosts; on-chain totals are per address, not per host.
payTo: 0xFFc458dB291b4ABcE020fE3de4f91F2770E537b1. The same payTo also receives for 10 other hosts: currency-api-production-4a8d.up.railway.app, dns-intel-api-production.up.railway.app, email-verify-api-production-d262.up.railway.app, hmo.payapi.market, ip-geo-api-production.up.railway.app, postcode-api-production.up.railway.app, property.payapi.market, screenshot-api-production-fe7e.up.railway.app, web-production-18a32.up.railway.app, web-scraper-api-production-bf20.up.railway.app; on-chain totals are per address, not per host.
Resources (4)
| Resource | Price | Network | Verdict | Catalogs | Description |
|---|---|---|---|---|---|
| POST /generate/basic | $0.001 | base | live re-probed 2026-10-17 | cdp | Generate a QR code PNG (returned base64-encoded in JSON) for any text or URL using defaul… |
| POST /decode | $0.001 | base | live re-probed 2026-10-18 | cdp | Decode QR/barcodes from a base64-encoded image; returns each detected code's type, decode… |
| POST /generate/styled | $0.001 | base | live | cdp | Generate a styled QR code PNG (base64 in JSON): custom foreground/background hex colours,… |
| POST /generate/batch | $0.001 | base | live | cdp | Generate up to 20 QR codes in one call; returns a per-item record with QR metadata and th… |
Catalog rows: cdp 4. Listed since at least 2026-10-08; last catalog update 2026-10-23. CDP counters: 10 calls, 10 payer-rows in 30 days (catalog-reported).
Badge
<a href="https://bazaar.agentexchange.work/seller/qr-api-production-1836.up.railway.app"><img src="https://bazaar.agentexchange.work/seller/qr-api-production-1836.up.railway.app.svg" alt="qr-api-production-1836.up.railway.app on the Agent Exchange x402 census: 4 routes live"></a>
Paid report (x402)
GET https://bazaar.agentexchange.work/seller/qr-api-production-1836.up.railway.app/report.json re-probes up to 18 of these resources right now, re-fetches the manifest and returns the whole record for $0.05 USDC on Base. Unpaid requests answer 402 with the terms. Pricing.