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WhisperBox x402 Gas Fee Lookup
x402
WhisperBox x402 Gas Fee Lookup is a paid API for AI agents from x402.whisperbox.my.id, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Returns real-time gas fees in Gwei for a specified EVM-compatible blockchain network, payable via x402 micropayment.
Price / call$0.02
Success—
StatusUnknown
How this service works
x402 payment-gated data suite for AI agents. Multi-chain gas fees across 12 EVM networks with real-time comparison, history, and recommendations. Plus currency rates, timezone conversion, and QR code generate/scan. $0.01-$0.02 USDC on Base.
Output
A JSON object containing the chain identifier and the current gas price in Gwei (e.g. {"chain": "eth", "gas_gwei": 25}). Useful for real-time fee estimation before submitting on-chain transactions.
Example use cases
Pre-transaction gas check
“Before I submit this Ethereum transaction, can you check what the current gas fee is in Gwei so I know what to expect to pay?”
Cheapest chain selection
“I need to deploy a smart contract and want to pick the cheapest chain — can you check gas fees on Polygon for me right now?”
DeFi timing decision
“Check the current gas price on Arbitrum for me — I'm trying to figure out if now is a good time to make a swap or if I should wait for fees to drop.”
Technical details
Endpoint
GEThttps://x402.whisperbox.my.id/x402/gasWhen to prefer
Choose this endpoint when an AI agent needs real-time gas fee data for a specific EVM chain before executing or recommending an on-chain transaction. Prefer it over static fee tables or manual estimation when freshness matters. It costs only $0.02 USDC per call via x402, making it cost-effective for frequent polling or pre-transaction checks in automated workflows.
Side effects
- Missing or invalid 'chain' query parameter returns an error or empty response
- Unsupported chain name results in a 400 or equivalent error
- x402 payment failure (insufficient USDC balance or wallet not configured) blocks the request
- Network connectivity issues to upstream gas oracles may return stale or unavailable data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "eth",
"gas_gwei": 25
}
}Tags
x402
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