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Gas Oracle & EIP-1559 Fee Estimator for Base Chain
x402
Gas Oracle & EIP-1559 Fee Estimator for Base Chain is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Reads the latest Base chain block, derives EIP-1559 base fee, suggests priority fees for safe-low/standard/fast tiers, and converts gas costs to USD for common transaction types.
Price / call$0.02
Success—
StatusUnknown
How this service works
Gas oracle / gas price API / EIP-1559 fee estimator / Base + Ethereum + Optimism + Arbitrum + Polygon gas tracker / etherscan-gas alternative / pre-tx cost estimator / USD gas-cost calculator / safe-low + standard + fast tier feed. Reads the chain's latest block, derives the EIP-1559 base fee, suggests priority fees for safe-low / standard / fast tiers, computes the total recommended maxFeePerGas, and converts cost to USD for common tx types (transfer, ERC-20 transfer, Uniswap swap, NFT mint).
Output
Returns the current EIP-1559 base fee from the latest Base block, recommended priority fees and maxFeePerGas values for safe-low, standard, and fast tiers, and USD cost estimates for common transaction types including ETH transfer, ERC-20 transfer, Uniswap swap, and NFT mint.
Example use cases
Example prompt
“What are the current gas fees on Base right now — give me the safe-low, standard, and fast tiers in gwei and also tell me how much a Uniswap swap would cost in USD at the standard tier?”
Technical details
Endpoint
POSThttps://x402-deployer.x402-deployer.workers.dev/gas-now-baseWhen to prefer
Use this endpoint when you need real-time EIP-1559 gas fee estimates specifically for the Base chain, including USD cost breakdowns for common transaction types, without needing a full Etherscan API key or running your own node. Ideal for pre-transaction cost checks in DeFi agents operating on Base.
Side effects
- RPC node unavailable or rate-limited — upstream fetch failure
- Stale block data if Base RPC is lagging
- USD price feed unavailable — ETH/USD conversion may fail
- Malformed POST body — validation error
- Network timeout from Cloudflare Worker to Base RPC
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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