x402 census · canary-production-f6b6.up.railway.app · 1d104e8489d4 · JSON
GET /v1/base/head
live
Current Base mainnet block height and base fee per gas in wei, read from the chain at request time
Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-02).
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://canary-production-f6b6.up.railway.app/v1/base/head |
| Method | GET |
| Price | $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x202BAb22a1117ACbA00738E2a6E7D8837Dab311C |
| Seller | canary-production-f6b6.up.railway.app |
| Catalogs | cdp (row updated 2026-09-15) |
| Listed since (lower bound) | 2026-09-15 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-15 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-09-15 (catalog-reported, not verified on chain) |
| Category (keyword rule) | chain-rpc |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | none |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
Latest re-probe
| Field | Value |
|---|---|
| Re-probed at | 2026-10-02T08:13:42.000Z (cron) |
| Verdict now | live changed from unprobed |
| HEAD / GET | 405 / 402 |
| accepts[0] | {"scheme":"exact","network":"eip155:8453","amount":"10000","payTo":"0xa0f3c29f25778dDf46fce2cAB5f7e7C25E6a1451","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}} |
| Live amount equals catalog price | yes |
| Latency | 520 ms |
| Error | none |
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Settlement history | unresolved: payTo not seen in the payer forensics (180 wallets' outbound history) or the Blockscout sample |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"queryParams": {},
"type": "http"
},
"output": {
"type": "json",
"example": {
"baseFeePerGas": "1043211",
"blockHeight": "35812044",
"network": "eip155:8453",
"observedAt": "2026-09-15T14:00:00.000Z"
}
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://canary-production-f6b6.up.railway.app/v1/base/head' -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/1d104e8489d4/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"1d104e8489d4"} 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 canary-production-f6b6.up.railway.app.