x402 census · attester.dev · 3a968a196110 · JSON

POST /spend-check

unprobed

Spend Check: should you pay this counterparty? Watchtower track record, CDP merchant catalog, and address hygiene combined into a clear/caution/avoid verdict with a signed attestation. $0.005 USDC per check.

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://attester.dev/spend-check

Method POST

Price $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x57407D691F755cAa107647718F3582a8A87467dD

Seller attester.dev

Catalogs cdp (row updated 2026-09-17)

Listed since (lower bound) 2026-09-17 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-17

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-09-17 (catalog-reported, not verified on chain)

Category (keyword rule) trading-signals

Templated path no

x402Version in catalog 2

Service name / tags Spend Check · risk, counterparty, payments, x402, agents

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 5

Payments 7

USDC volume $0.07

Median payment $0.005

First / last payment 2026-07-27 / 2026-09-17

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x57407D691F755cAa107647718F3582a8A87467dD

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "amount_usd": 0.25,
   "payTo": "attester.dev"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "attestation": {
    "verifier_address": "0x…"
   },
   "confidence": 0.6,
   "evidence": [
    {
     "known_target": true,
     "latest_verdict": "honoring",
     "source": "watchtower"
    }
   ],
   "signature": "0x…",
   "verdict": "caution"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://attester.dev/spend-check' -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/3a968a196110/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"3a968a196110"} 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 attester.dev.