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Base Gas Conditions
x402
Base Gas Conditions is a paid API for AI agents from ca-tax-api-mainnet.lxtap.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-24).
Returns current Base network gas conditions including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for ETH and ERC-20 transfers.
Price / call$0.005
Success—
StatusUnknown
How this service works
Pay-per-call data for AI agents, paid in USDC on Base with x402: token risk checks (rug check) on Base, Ethereum, Arbitrum, Optimism, Polygon and Solana, onchain reads (balances, transactions, gas, contracts, NFTs, whale trades, new pools, ENS and Basenames), ECB exchange rates, and Canadian sales tax and business days.
Output
A JSON object with the current Base block number, base fee in gwei, gas price in gwei, priority fee in gwei, estimated cost of a standard ETH transfer in both ETH and USD, and estimated cost of an ERC-20 transfer in both ETH and USD (using Chainlink ETH/USD price feed).
Example use cases
Pre-transaction cost check
“Before I send this ERC-20 token on Base, tell me what gas fees look like right now and how much the transfer will cost me in USD.”
Gas price monitoring for a DeFi bot
“Check the current Base network gas price and base fee so I can decide whether it's cheap enough to execute my trade right now.”
Block and fee snapshot for reporting
“Give me a snapshot of the current Base block number, base fee, and gas price in gwei — I need it for my onchain activity report.”
Technical details
Endpoint
GEThttps://ca-tax-api-mainnet.lxtap.workers.dev/base/gas?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time Base network gas conditions and cost estimates denominated in both ETH and USD. It is ideal for pre-flight transaction cost checks, gas optimization decisions, or monitoring Base network activity. Prefer this over generic Ethereum gas APIs when you are specifically operating on the Base L2 network.
Side effects
- RPC node unavailable or rate-limited — may return 5xx or stale data
- Chainlink ETH/USD feed temporarily unavailable — USD estimates may be missing or null
- x402 payment failure — returns 402 if USDC payment is not provided or invalid
- Network congestion may cause slightly delayed block data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Excludes Base's L1 data fee, which adds a small amount per transaction.",
"chain": "base",
"blockTime": "2026-10-22T15:49:57.000Z",
"nativeUsd": 2388.88,
"baseFeeGwei": "0.005",
"blockNumber": 52947425,
"gasPriceGwei": "0.006",
"nativeSymbol": "ETH",
"estimatedCost": {
"erc20Transfer": {
"usd": 0.0009317,
"native": "0.00000039"
},
"nativeTransfer": {
"usd": 0.000301,
"native": "0.000000126"
}
},
"maxPriorityFeeGwei": "0.001"
}
}Tags
x402
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