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Plainchain Gas Price Oracle
x402
Plainchain Gas Price Oracle is a paid API for AI agents from plainchain.appin60.com, paid per call via x402, $0.001042/call, status unknown (last checked 2026-10-14).
Returns current gas price, base fee, priority fee, and cost estimates for common transaction types on Base, Arbitrum, Ethereum, or Optimism
Price / call$0.001042
Success—
StatusUnknown
How this service works
Gas, balances, token data, address type, approvals, transaction decoding, x402 receipt verification and verifiable randomness on Base, Arbitrum, Ethereum and Optimism. No API key: pay $0.001-$0.01 per call in USDC on Base via x402.
Output
Returns a JSON object with: current block number, chain name and ID, ETH/USD price, base fee in Gwei, gas price in Gwei, priority fee in Gwei, and USD/ETH cost estimates for three common transaction types — ETH transfer (21k gas), ERC-20 transfer (65k gas), and DEX swap (180k gas).
Example use cases
Pre-swap gas cost check
“Before I do a token swap on Base, can you tell me what the current gas price is and roughly how much a DEX swap will cost me in USD?”
Cross-chain fee comparison
“Check the current gas prices on both Arbitrum and Optimism so I can decide which chain is cheaper to use for my transaction right now.”
ETH transfer cost estimate
“How much would a simple ETH transfer cost on Ethereum mainnet right now in USD? Give me the current gas price and the estimate.”
Technical details
Endpoint
GEThttps://plainchain.appin60.com/v1/gas?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs real-time gas fee data across Base, Arbitrum, Ethereum, or Optimism without setting up API keys — ideal for cost estimation before submitting transactions, comparing fees across chains, or deciding when to execute a transaction. Pay-per-call x402 pricing ($0.001) makes it cost-effective for low-frequency lookups.
Side effects
- Unsupported chain name or chain ID returns an error
- Network congestion or RPC issues may cause stale or delayed data
- Missing chain parameter defaults to Base — may surprise callers expecting a different chain
- x402 payment failure if USDC balance is insufficient on Base
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"block": 36581662,
"chain": "Base",
"ethUsd": 2527.2,
"chainId": 8453,
"estimates": {
"dexSwap": {
"eth": 0.00000108,
"gas": 180000,
"usd": 0.00273
},
"ethTransfer": {
"eth": 1.26e-7,
"gas": 21000,
"usd": 0.000318
},
"erc20Transfer": {
"eth": 3.9e-7,
"gas": 65000,
"usd": 0.000986
}
},
"baseFeeGwei": 0.005,
"gasPriceGwei": 0.006,
"priorityFeeGwei": 0.001
}
}Tags
x402
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