x402 census · api.agentstools.dev · 53c51a9c322e · JSON

GET /btc/mempool

live

Live Bitcoin mempool snapshot: unconfirmed transaction count, total virtual size and total fees, a fee-rate histogram broken into buckets, and an estimated block backlog. Informational, not advice.

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/btc/mempool

Method GET

Price $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493

Seller api.agentstools.dev

Catalogs cdp (row updated 2026-09-23)

Listed since (lower bound) 2026-09-23 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-23

CDP quality counters 2 calls and 2 unique payers in 30 days, last call 2026-09-23 (catalog-reported, not verified on chain)

Category (keyword rule) other/unknown

Templated path no

x402Version in catalog 2

Service name / tags btc-mempool · bitcoin, btc, mempool, fee-histogram, backlog

Unpaid probe (census of 2026-10-01)

Field Value

Probed at 2026-10-01T00:00:30.018Z

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":"5000","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 1,867 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",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "estimated_backlog_blocks": 45.6,
   "fee_histogram": [
    {
     "fee_rate_sat_vb": 7.72,
     "vsize": 50009
    }
   ],
   "mempool_total_fee_sat": 11284021,
   "mempool_tx_count": 89345,
   "mempool_vsize": 45652382,
   "sources": {
    "partial": false
   }
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://api.agentstools.dev/btc/mempool' -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/53c51a9c322e/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"53c51a9c322e"} 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.