x402 census · x402.professorsausages.com · 25ff13d30ffa · JSON
GET /gas-oracle/:chain/estimate
needs-input
USD cost of a specific tx incl. OP-stack L1 data fee
Verdict: not verified by an unpaid GET. 400/422: wants input before the 402. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://x402.professorsausages.com/gas-oracle/:chain/estimate |
| Method | GET |
| Price | $0.002 USDC = 2000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x54ebFCF3870439B9db62381848c5DabC05c70d5B |
| Seller | x402.professorsausages.com |
| Catalogs | cdp (row updated 2026-07-20) |
| Listed since (lower bound) | 2026-07-20 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-07-20 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-09-20 (catalog-reported, not verified on chain) |
| Category (keyword rule) | chain-rpc |
| Templated path | yes: contains :param or {param}; probed as listed |
| x402Version in catalog | 2 |
| Service name / tags | Multichain Gas Oracle · gas, fees, eip1559, l2, evm |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
Latest re-probe
| Field | Value |
|---|---|
| Re-probed at | 2026-10-01T19:13:42.000Z (cron) |
| Verdict now | needs-input changed from unprobed |
| HEAD / GET | 400 / 400 |
| accepts[0] | none |
| Live amount equals catalog price | not comparable |
| Latency | 479 ms |
| Error | none |
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 6 |
| Payments | 18 |
| USDC volume | $0.31 |
| Median payment | $0.02 |
| First / last payment | 2026-07-22 / 2026-09-27 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x54ebFCF3870439B9db62381848c5DabC05c70d5B |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"queryParams": {
"gas": "Explicit gas limit (21000–30000000); overrides txType gas.",
"speed": "slow|standard(default)|fast.",
"txType": "transfer|erc20|swap|nftMint|deploy (preset gas + calldata size)."
},
"type": "http"
},
"output": {
"type": "object"
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://x402.professorsausages.com/gas-oracle/:chain/estimate' -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/25ff13d30ffa/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"25ff13d30ffa"} 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.professorsausages.com.