x402 census · quartermaster.surewhynot.app · a339d88ae4cc · JSON

GET /v1/payment-proof

unprobed

Verify an x402 settlement on Base OR Solana: pass a 0x transaction hash or a base58 signature, confirm it succeeded, decode its USDC transfers (event logs on Base, net token-balance deltas on Solana), and optionally assert the receiving wallet and amount.

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://quartermaster.surewhynot.app/v1/payment-proof

Method GET

Price $0.003 USDC = 3000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

payTo 0x5253666c40432f009ebd99908b9cd2a7fd1019cb

Seller quartermaster.surewhynot.app

Catalogs cdp (row updated 2026-09-18)

Listed since (lower bound) 2026-09-18 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-18

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-09-18 (catalog-reported, not verified on chain)

Category (keyword rule) chain-rpc

Templated path no

x402Version in catalog 2

Service name / tags Quartermaster Payment Proof · x402, settlement, verification, receipt, payments

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 20

Payments 43

USDC volume $0.19

Median payment $0.005

First / last payment 2026-07-13 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x5253666c40432f009ebd99908b9cd2a7fd1019cb (contract: EIP7702Proxy)

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "amount": "0.001",
   "hash": "0x06be01596be1cb68d9b12a33946d2228a82eeb31016ab237825cec547017095f",
   "payTo": "0xc2a3...4083"
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "checks": {
    "amount_matches": true,
    "onchain_success": true,
    "paid_to_expected_wallet": true
   },
   "verdict": "verified"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://quartermaster.surewhynot.app/v1/payment-proof' -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/a339d88ae4cc/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"a339d88ae4cc"} 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 quartermaster.surewhynot.app.