x402 census · x402engine.app · 22c2216ce200 · JSON

GET /api/crypto/history

live

x402engine — Historical price, market cap, and volume data for any coin

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

Facts from the catalogs

Field Value

URL https://x402engine.app/api/crypto/history

Method GET

Price $0.003 USDC = 3000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts eip155:4326, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

payTo 0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629

Seller x402engine.app

Catalogs cdp (row updated 2026-10-13)

Listed since (lower bound) 2026-10-13 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-13

CDP quality counters 2 calls and 2 unique payers in 30 days, last call 2026-10-13 (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 2026-10-22T00:19:39.741Z

HEAD 403

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"3000","payTo":"0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629","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 / cloudflare / *

Latency 129 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 86

Payments 231

USDC volume $11.48

Median payment $0.01

First / last payment 2026-05-25 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "currency": "usd",
   "days": "30",
   "id": "bitcoin",
   "interval": "daily"
  },
  "type": "http"
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://x402engine.app/api/crypto/history' -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/22c2216ce200/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"22c2216ce200"} 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 x402engine.app.