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Base Toolbox – Gas Price Lookup
x402
Base Toolbox – Gas Price Lookup is a paid API for AI agents from basetoolbox.cartonpliant.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Returns the current Base network gas price (base fee in gwei and estimated 21k-gas transfer cost in wei)
Price / call$0.001
Success—
StatusUnknown
How this service works
Base toolbox: before you sign on Base — Uniswap v3 preflight, leftover allowances, tx explain, transfer check. $0.10 USDC. Also $0.001 price/gas/ENS. GET /v1/constants free. No CoinGecko key.
Output
A JSON object with three fields: 'ok' (boolean indicating success), 'base_fee_gwei' (current Base network base fee as a decimal number in gwei, e.g. 0.02), and 'transfer_21k_wei' (estimated cost in wei for a standard 21,000-gas ETH transfer as a string, e.g. '420000000000').
Example use cases
Pre-flight gas check before swap
“Before I approve this Uniswap trade on Base, can you check what the current gas fee is so I know if it's worth executing right now?”
Gas cost alert for automation bot
“Check the current Base gas price and tell me the base fee in gwei — I want to know if it's below 0.05 gwei before triggering my batch transaction.”
Cost estimate for ETH transfer
“I'm about to send some ETH on Base to a friend — what's the current gas price and how much will a standard transfer actually cost me in wei?”
Technical details
Endpoint
POSThttps://basetoolbox.cartonpliant.workers.dev/v1/base-gasWhen to prefer
Use this endpoint when you need a fast, cheap ($0.001 USDC) real-time gas price on Base L2 without needing a CoinGecko API key or running your own RPC node. Ideal for preflight transaction checks, DeFi bots, and gas-gating logic on the Base network specifically. Prefer over general Ethereum mainnet gas APIs when the target chain is Base.
Side effects
- Network or RPC failure — ok: false with error message
- Rate limiting from the underlying Base RPC node
- Stale data if the Base node is temporarily behind
- Invalid request body format — may return 400 or empty response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"base_fee_gwei": 0.02,
"transfer_21k_wei": "420000000000"
}
}Tags
x402
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