x402 census · apexfaucet.xyz · f0274ec4777a · JSON

GET /api/x402/x402-endpoint-doctor

live

x402 validator: will Coinbase Bazaar list your x402 endpoint, and can a client pay it? Why will Coinbase not list your x402 endpoint, and can a standard client pay it? Pass ?url= (and &method=POST for a POST route). We read its 402 as a client does, check what Coinbase's facilitator and Bazaar enforce (accepts[0] network, the $0.001 minimum, descriptions over 500 characters, a bazaar schema that …

Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-01).

Facts from the catalogs

Field Value

URL https://apexfaucet.xyz/api/x402/x402-endpoint-doctor

Method GET

Price $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts eip155:5042, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

payTo 0xd334ab5151c624cada654854e2879903dc4217ed

Seller apexfaucet.xyz

Catalogs cdp (row updated 2026-09-27)

Listed since (lower bound) 2026-09-27 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-27

CDP quality counters 4 calls and 1 unique payers in 30 days, last call 2026-09-27 (catalog-reported, not verified on chain)

Category (keyword rule) crypto-data

Templated path no

x402Version in catalog 2

Service name / tags APEX x402 endpoint validator · x402, validator, bazaar, debugging, payments

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

Latest re-probe

Field Value

Re-probed at 2026-10-01T14:13:42.000Z (cron)

Verdict now live changed from unprobed

HEAD / GET 402 / 402

accepts[0] {"scheme":"exact","network":"base","amount":"5000","payTo":"0xd334ab5151c624cada654854e2879903dc4217ed","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Latency 1,595 ms

Error none

On-chain facts for the payTo (public address)

Field Value

Distinct payers 3

Payments 50

USDC volume $1.45

Median payment n/a

First / last payment 2026-09-27 / 2026-09-30

Sampler-shaped share of payments n/a

Payers that are not samplers n/a

Source blockscout-sample — newest page of inbound ERC-20 transfers only (<=50); counts are a floor, not a total

Address 0xd334ab5151c624cada654854e2879903dc4217ed

Declared input and output (extensions.bazaar)

{
 "input": {
  "discoverable": true,
  "method": "GET",
  "queryParams": {
   "method": "GET",
   "url": "https://api.onesource.io/api/chain/erc20-balance"
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "asset": "USDC",
   "data": {
    "holders": 9902,
    "priceUsd": 0.0000041,
    "symbol": "APEX"
   },
   "ok": true,
   "paid": 0.01,
   "tier": "cheap"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://apexfaucet.xyz/api/x402/x402-endpoint-doctor' -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/f0274ec4777a/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"f0274ec4777a"} 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 apexfaucet.xyz.