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402rpc Ethereum Gas Price Oracle
x402
402rpc Ethereum Gas Price Oracle is a paid API for AI agents from 402rpc.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-15).
Returns real-time Ethereum mainnet gas prices including latest block, base fee, historical priority fee percentiles (10th/50th/90th) over the last 20 blocks, and suggested max fees for slow/normal/fast transaction inclusion — all in gwei.
Price / call$0.001
Success—
StatusUnknown
How this service works
Ethereum mainnet gas now, from an independently operated full node: latest block, base fee and the priority fees paid in the last 20 blocks (10th, 50th, 90th percentile), with a suggested max fee for slow, normal and fast inclusion in gwei. Use it before sending a transaction or to time on-chain activity.
Output
A JSON object containing: the latest Ethereum block number, current base fee in gwei, 10th/50th/90th percentile priority fees from the last 20 blocks in gwei, and three suggested max fee values (slow, normal, fast) for transaction inclusion — all sourced live from an independent full node.
Example use cases
Pre-transaction gas check before DeFi swap
“Before I send this Uniswap swap, what's the current Ethereum gas price and what max fee should I use for normal-speed inclusion?”
Timing on-chain mint for low gas
“I'm about to mint an NFT on Ethereum mainnet — can you check the current base fee and priority fee percentiles so I can decide if gas is cheap enough right now?”
Automated gas monitoring for trading bot
“Pull the latest Ethereum gas data including the slow, normal, and fast max fee suggestions so my trading bot can decide whether to submit a transaction this block.”
Technical details
Endpoint
GEThttps://402rpc.com/v1/eth/gas?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a neutral, independently operated Ethereum gas oracle not tied to a third-party aggregator or centralized provider. Ideal for agents that need real-time gwei estimates directly from a full node before submitting transactions, or for timing on-chain activity based on recent priority fee history.
Side effects
- Full node temporarily out of sync — may return slightly stale block data
- Payment not processed — returns 402 Payment Required if x402 micropayment fails
- Node connectivity issues — may return 5xx error during network disruption
- Rate limiting if payment protocol fails to complete
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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