x402 census · x402.billionaireorder.com · 5c7ff2291174 · JSON

POST /v1/defi-sentinel

live

High-value M2M API for liquidation bots and automated funds. Analyzes wallet health factors or smart contract bytecode for hidden trap functions. Pay-per-call $0.30 USDC Base.

Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.

Facts from the catalogs

Field Value

URL https://x402.billionaireorder.com/v1/defi-sentinel

Method POST

Price $0.30 USDC = 300000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x2f58f210fca0e3a486eacc29057a04576aee265e

Seller x402.billionaireorder.com

Catalogs cdp (row updated 2026-10-19)

Listed since (lower bound) 2026-10-19 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-19

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-10-19 (catalog-reported, not verified on chain)

Category (keyword rule) crypto-data

Templated path no

x402Version in catalog 2

Service name / tags none

Unpaid probe (census of 2026-10-22)

Field Value

Probed at 2026-10-22T00:31:31.016Z

HEAD 405

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header+body

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"300000","payTo":"0x2f58f210fca0e3a486eacc29057a04576aee265e","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":600,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Live payTo equals catalog payTo yes

extensions.bazaar in the 402 yes

PAYMENT-REQUIRED header yes

WWW-Authenticate offer none

Content type / server / CORS application/json / nginx/1.18.0 (Ubuntu) / none

Latency 181 ms

Error none

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 2

Payments 2

USDC volume $0.02

Median payment $0.01

First / last payment 2026-09-14 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x2f58f210fca0e3a486eacc29057a04576aee265e (contract: EIP7702Proxy)

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "chain": "eip155:8453",
   "input_data": "0x2f58..."
  },
  "bodyFields": {
   "agent_ref_hash": {
    "description": "Agent ref",
    "required": false,
    "type": "string"
   },
   "chain": {
    "description": "Chain eip155:8453",
    "required": false,
    "type": "string"
   },
   "input_data": {
    "description": "Wallet address or input data",
    "required": true,
    "type": "string"
   }
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "analysis": {
    "health_factor": 1.42
   },
   "result": "Health factor 1.42",
   "score": 95
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://x402.billionaireorder.com/v1/defi-sentinel' -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/5c7ff2291174/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"5c7ff2291174"} 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 x402.billionaireorder.com.