x402 census · preflight402.com · bd67df7887b8 · JSON

POST /v1/evm/tx-inspect

unprobed

Call before signing an Ethereum or Base transaction or calldata. Decodes raw transaction bytes or contract calldata against standard interfaces (ERC-20, ERC-721, ERC-1155, WETH, EIP-2612 Permit and Permit2) in memory. Returns the decoded method signature, typed parameters, value in wei and standard specification links. Mechanical byte decoding only: never simulates state or advises whether to sig…

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://preflight402.com/v1/evm/tx-inspect

Method POST

Price $0.10 USDC = 100000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0xB9Db3966C7F18283624C97E860a84CEf7f9ba607

Seller preflight402.com

Catalogs cdp (row updated 2026-09-28)

Listed since (lower bound) 2026-09-28 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-28

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-09-28 (catalog-reported, not verified on chain)

Category (keyword rule) crypto-data

Templated path no

x402Version in catalog 2

Service name / tags Preflight · ethereum, base, evm, crypto, smart-contracts

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 2

Payments 2

USDC volume $0.10

Median payment $0.05

First / last payment 2026-09-17 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0xB9Db3966C7F18283624C97E860a84CEf7f9ba607

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "calldata": "0xa9059cbb000000000000000000000000222222222222222222222222222222222222222200000000000000000000000000000000000000000000000000000000000f4240",
   "network": "base",
   "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example_truncated": true,
  "chars": 550
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://preflight402.com/v1/evm/tx-inspect' -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/bd67df7887b8/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"bd67df7887b8"} 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 preflight402.com.