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HorizonPulse Ethereum Gas Fee Oracle
x402
HorizonPulse Ethereum Gas Fee Oracle is a paid API for AI agents from horizonpulse.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).
Returns live Ethereum and Base network gas fee data including baseFee, priority fees, suggested maxFee, timing hint (cheap/normal/expensive), and optional ETH transfer cost in USD
Price / call$0.01
Success—
StatusUnknown
How this service works
Live Base + Ethereum gas fees via eth_feeHistory / eth_gasPrice: baseFee, priority, suggested maxFee, timingHint (cheap/normal/expensive), optional transfer USD cost
Output
Returns a snapshot of current Ethereum/Base gas conditions including: baseFee (current base fee in gwei), priority fee recommendation, suggested maxFee for transaction submission, a timingHint enum ('cheap', 'normal', or 'expensive') indicating current network congestion, and an optional estimated USD cost for a standard ETH transfer.
Example use cases
Pre-transaction gas check for DeFi
“Before I submit this on-chain swap, check whether gas is cheap or expensive right now on Ethereum and tell me the suggested maxFee I should use.”
Automated gas-aware transaction scheduler
“Keep an eye on Ethereum gas — alert me when the timing hint drops to 'cheap' so I know it's a good time to send my ETH transfer.”
USD cost estimate for ETH transfer
“How much will a simple ETH transfer cost me in USD right now, including the current base fee and priority fee on Ethereum?”
Technical details
Endpoint
GEThttps://horizonpulse.dev/api/gas?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time Ethereum or Base gas fee data with actionable timing guidance (cheap/normal/expensive) and USD cost context, especially in DeFi agent workflows where timing a transaction for low-cost windows matters. Prefer over raw RPC calls when you want pre-interpreted signals without managing your own eth_feeHistory parsing. Best suited for lightweight, per-call gas checks at $0.01 USDC rather than maintaining a dedicated gas oracle infrastructure.
Side effects
- RPC node unavailability may cause stale or missing fee data
- eth_feeHistory call failure returns error or empty response
- Network congestion spikes may cause rapidly outdated estimates between call and transaction submission
- Invalid query parameters return 400-level errors
- Payment failure via x402 protocol returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ethUsd": 0,
"networks": [
{
"network": "base",
"timingHint": "normal",
"baseFeeGwei": "0",
"priorityFeeGwei": "0",
"suggestedMaxFeeGwei": "0"
}
],
"methodology": "eth_feeHistory + optional CoinGecko ETH USD"
}
}Tags
x402
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