x402 census · agentdata-api.sander-van-aard.workers.dev · 4ff95fa8636f · JSON
POST /x402/preflight
unprobed
Preflight before paying an x402 service: is it working right now, and did it work the past 30 days? One live probe of the exact resource URL you intend to pay (status, latency, x402 validity, the payTo/price the service itself publishes in its 402, manifest presence) plus our own monitoring history of the host (30-day uptime, last check, recent changes such as payTo or price drift). Optionally ve…
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://agentdata-api.sander-van-aard.workers.dev/x402/preflight |
| Method | POST |
| Price | $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xb0ae6a9bd7a573ddda58db6c28622417e8ca2099 |
| Seller | agentdata-api.sander-van-aard.workers.dev |
| 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 | 2 calls and 2 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 | none |
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 | 5 |
| Payments | 10 |
| USDC volume | $0.06 |
| Median payment | $0.004 |
| First / last payment | 2026-07-26 / 2026-09-06 |
| Sampler-shaped share of payments | 90.0% |
| Payers that are not samplers | 1 |
| Source | forensics-2026-09-30 |
| Address | 0xb0ae6a9bd7a573ddda58db6c28622417e8ca2099 (contract: EIP7702Proxy) |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"pay_to": "0x0000000000000000000000000000000000000001",
"resource": "https://api.example-service.com/data"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 417
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://agentdata-api.sander-van-aard.workers.dev/x402/preflight' -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/4ff95fa8636f/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"4ff95fa8636f"} 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 agentdata-api.sander-van-aard.workers.dev.