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x402.professorsausages.com Gas Oracle Transaction Cost Estimator
x402
x402.professorsausages.com Gas Oracle Transaction Cost Estimator is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-27).
Estimates the total USD cost of a specific transaction on a given chain, including OP-stack L1 data fee breakdown
Price / call$0.002
Success—
StatusUnknown
How this service works
USD cost of a specific tx incl. OP-stack L1 data fee
Output
Returns a structured object with the chain name, block number, gas used, speed tier, execution cost (L2 native + USD), L1 data fee (for OP-stack chains, or null otherwise), total fees in native and USD, and a comparable Ethereum cost for reference, along with a fetchedAt timestamp.
Example use cases
Example prompt
“What will it cost in USD to execute this transaction on Base at standard speed — including the OP-stack L1 data fee? Give me a full breakdown of execution cost versus L1 calldata fee.”
Technical details
Endpoint
GEThttps://x402.professorsausages.com/gas-oracle/:chain/estimate?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a full USD cost breakdown for a specific transaction on an OP-stack chain (e.g. Optimism, Base), especially when the L1 calldata fee component matters — such as for cost modeling, fee transparency, or smart contract interaction budgeting. Prefer this over the current gas market endpoint when you have a specific transaction to price rather than just wanting the current gas market rates.
Side effects
- Unsupported chain identifier returns an error or empty response
- Missing or malformed transaction input causes validation failure
- Chain is not an OP-stack chain, so l1DataFee is null (not an error, but callers expecting it may be surprised)
- Network congestion or RPC unavailability may cause stale or failed fetch
- Incorrect speed enum value (not slow/standard/fast) may cause parameter rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chainrequired | string | Which chain the address belongs to. base and ethereum run full on-chain mode; the rest are list-only mode. |
| addressrequired | string | The address in that chain's native format (0x… for EVM, base58/bech32 otherwise). Checked against that chain's shape BEFORE the payment gate — a malformed address is a free 400, never a 402. |
Tags
x402
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