x402 census · api.agentstools.dev · 44d22bb1a879 · JSON

GET /crypto/hash

live

Compute keccak256/sha256, a 4-byte function selector, an event topic0, or an ENS namehash/labelhash from a string or hex input.

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

Facts from the catalogs

Field Value

URL https://api.agentstools.dev/crypto/hash

Method GET

Price $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493

Seller api.agentstools.dev

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 7 calls and 6 unique payers in 30 days, last call 2026-09-25 (catalog-reported, not verified on chain)

Category (keyword rule) crypto-data

Templated path no

x402Version in catalog 2

Service name / tags crypto-hash · crypto, keccak256, sha256, selector, namehash

Unpaid probe (census of 2026-09-30)

Field Value

Probed at 2026-09-30T23:18:47.127Z

HEAD 402

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":"1000","payTo":"0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"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 / uvicorn / none

Latency 6,548 ms

Error Payment required

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 45

Payments 314

USDC volume $2.00

Median payment $0.003

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

Sampler-shaped share of payments 98.4%

Payers that are not samplers 1

Source forensics-2026-09-30

Address 0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "algo": "selector",
   "input": "transfer(address,uint256)"
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "algo": "selector",
   "hash": "0xa9059cbb"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://api.agentstools.dev/crypto/hash' -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/44d22bb1a879/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"44d22bb1a879"} 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 api.agentstools.dev.