x402 census · qr-api-production-1836.up.railway.app · 1cd155fe2fb3 · JSON

POST /generate/basic

live

Generate a QR code PNG (returned base64-encoded in JSON) for any text or URL using default black-on-white styling.

Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-01).

Facts from the catalogs

Field Value

URL https://qr-api-production-1836.up.railway.app/generate/basic

Method POST

Price $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0xFFc458dB291b4ABcE020fE3de4f91F2770E537b1

Seller qr-api-production-1836.up.railway.app

Catalogs cdp (row updated 2026-09-25)

Listed since (lower bound) 2026-09-25 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-25

CDP quality counters 6 calls and 3 unique payers in 30 days, last call 2026-09-25 (catalog-reported, not verified on chain)

Category (keyword rule) dev-tools/utilities

Templated path no

x402Version in catalog 2

Service name / tags none

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

Latest re-probe

Field Value

Re-probed at 2026-10-01T03:13:24.000Z (cron)

Verdict now live changed from unprobed

HEAD / GET 402 / 402

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"1000","payTo":"0xFFc458dB291b4ABcE020fE3de4f91F2770E537b1","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Latency 642 ms

Error none

On-chain facts for the payTo (public address)

Field Value

Distinct payers 78

Payments 327

USDC volume $0.49

Median payment $0.001

First / last payment 2026-06-11 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0xFFc458dB291b4ABcE020fE3de4f91F2770E537b1

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "data": "https://payapi.market"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "back_color": "#ffffff",
   "border": 4,
   "box_size": 10,
   "data": "https://payapi.market",
   "error_correction": "M",
   "fill_color": "#000000",
   "format": "png",
   "height": 330,
   "image_base64": "iVBORw0KGgoAAAANSUhEUgAAASIAAAEiCAYAAABdvt+2AAAABmJLR0QA/wD/AP+gvaeTAAAF...",
   "modules": 25,
   "size_bytes": 512,
   "version": 2,
   "width": 330
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://qr-api-production-1836.up.railway.app/generate/basic' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'

The catalog declares POST. 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/1cd155fe2fb3/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"1cd155fe2fb3"} 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 qr-api-production-1836.up.railway.app.