x402 census · x402-api-catalog.onrender.com · 3ff24ba1376b · JSON
GET /api/x402-doctor
unprobed
Audits another x402 service for the exact failure modes that cause aggregators (agent-tools.cloud, x402scan, Bazaar) to mark it 'down' or make its 402 challenge unreadable: missing/invalid /.well-known/x402 descriptor, an unpaid request returning 500/404 instead of a clean 402, a malformed or missing payment-required challenge, and drift between the descriptor's advertised terms and the live chal…
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://x402-api-catalog.onrender.com/api/x402-doctor |
| Method | GET |
| Price | $1.00 USDC = 1000000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x9041f8a43D0B43209B9227DE2c7fb25c9FE3847E |
| Seller | x402-api-catalog.onrender.com |
| Catalogs | cdp (row updated 2026-09-07) |
| Listed since (lower bound) | 2026-09-07 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-07 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-09-07 (catalog-reported, not verified on chain) |
| Category (keyword rule) | directory/listing |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | PreFlight Checker · x402, diagnostics, devtools, category:ops-checks |
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 | 2 |
| Payments | 23 |
| USDC volume | $3.61 |
| Median payment | n/a |
| First / last payment | 2026-09-07 / 2026-09-29 |
| 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 | 0x9041f8a43D0B43209B9227DE2c7fb25c9FE3847E |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"queryParams": {
"path": "/api/some-paid-endpoint",
"url": "https://example-service.onrender.com"
},
"type": "http"
},
"output": {
"type": "json",
"example": {
"checks": [],
"fixes": [],
"score": 40,
"url": "https://example-service.onrender.com",
"verdict": "broken: aggregators will show this as down"
}
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://x402-api-catalog.onrender.com/api/x402-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/3ff24ba1376b/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"3ff24ba1376b"} 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 x402-api-catalog.onrender.com.