x402 census · fiatdock.com · 5385342b6bb8 · JSON
POST /v1/chain/usdc-balance
unprobed
USDC balance of any address on Base — the x402 settlement asset (atomic + USDC). Pay-per-call via x402. An empty body is answered for the wallet that pays (the payment's signer); send {"address":"0x…"} for any other address.
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://fiatdock.com/v1/chain/usdc-balance |
| Method | POST |
| Price | $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xeB12bB2f52EeD33DBa6A00774E48324032Fd87C6 |
| Seller | fiatdock.com |
| 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 | 8 calls and 2 unique payers in 30 days, last call 2026-09-25 (catalog-reported, not verified on chain) |
| Category (keyword rule) | chain-rpc |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | FiatDock · base, usdc, balance, onchain |
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 | 6 |
| Payments | 14 |
| USDC volume | $0.07 |
| Median payment | $0.001 |
| First / last payment | 2026-08-10 / 2026-09-27 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0xeB12bB2f52EeD33DBa6A00774E48324032Fd87C6 |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"asOf": "2026-07-30T00:00:00.000Z",
"asset": "USDC",
"atomic": "1000000",
"contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "base",
"usdc": "1"
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://fiatdock.com/v1/chain/usdc-balance' -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/5385342b6bb8/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"5385342b6bb8"} 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 fiatdock.com.