x402 census · web-production-18a32.up.railway.app · eb22ba447ace · JSON

POST /stamp-duty

unprobed

UK Stamp Duty Land Tax (SDLT) calculator with first-time buyer relief and surcharges.

Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.

Facts from the catalogs

Field Value

URL https://web-production-18a32.up.railway.app/stamp-duty

Method POST

Price $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0xFFc458dB291b4ABcE020fE3de4f91F2770E537b1

Seller web-production-18a32.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 3 calls and 1 unique payers in 30 days, last call 2026-09-25 (catalog-reported, not verified on chain)

Category (keyword rule) other/unknown

Templated path no

x402Version in catalog 2

Service name / tags none

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

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 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": {
   "is_additional_property": false,
   "is_first_time_buyer": false,
   "is_non_resident": false,
   "price": 350000
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "breakdown": [
    {
     "band": "£0 – £125,000",
     "rate": "0.0%",
     "tax": 0
    },
    {
     "band": "£125,000 – £250,000",
     "rate": "2.0%",
     "tax": 2500
    },
    {
     "band": "£250,000 – £350,000",
     "rate": "5.0%",
     "tax": 5000
    }
   ],
   "buyer_type": "Standard",
   "effective_rate": 2.14,
   "price": 350000,
   "total_tax": 7500
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://web-production-18a32.up.railway.app/stamp-duty' -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/eb22ba447ace/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"eb22ba447ace"} 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 web-production-18a32.up.railway.app.