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NetIntel Gas Price API
x402
NetIntel Gas Price API is a paid API for AI agents from netintel.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Returns live gas prices and USD cost estimates for transfers, ERC-20 sends, and swaps across Base, Ethereum, Arbitrum, Optimism, and Polygon in a single call
Price / call$0.002
Success—
StatusUnknown
How this service works
Live gas prices across Base, Ethereum, Arbitrum, Optimism, and Polygon with USD cost estimates for a transfer, an ERC-20 send, and a swap — keyless, one call, all chains. Per chain: gas price + EIP-1559 base/priority fee in gwei, native-token USD price, 15s cache. L2 figures are execution-gas only (L1 data fee excluded, flagged in findings).
Output
A JSON object keyed by chain name, each containing: gas_price_gwei, base_fee_gwei, priority_fee_gwei, native_token symbol, native_usd price, cache_age_seconds, and usd_estimates with separate USD costs for transfer, erc20_transfer, and swap. Also includes a top-level stale boolean and a findings array flagging caveats such as L2 L1 data fee exclusions.
Example use cases
Cheapest chain for DeFi swap
“I want to do a token swap — can you check gas prices across all five chains (Base, Ethereum, Arbitrum, Optimism, Polygon) and tell me which one is cheapest in USD right now?”
Pre-trade gas cost check
“Before I send an ERC-20 token on Ethereum, what's the current gas price in gwei and roughly how much will that transfer cost me in USD?”
Multi-chain gas dashboard
“Pull live gas prices and USD estimates for transfers and swaps on Optimism and Polygon so I can decide which to use for my next transaction.”
Technical details
Endpoint
GEThttps://netintel.dev/gas/priceWhen to prefer
Choose this endpoint when you need current gas prices and USD cost estimates across multiple EVM chains in a single call without managing separate RPC connections. It is ideal for agents that need to compare fees across Base, Ethereum, Arbitrum, Optimism, and Polygon simultaneously, or that need ready-made USD estimates for common operations (transfer, ERC-20 send, swap) rather than computing them from raw gwei. The 15-second cache makes it suitable for near-real-time decision-making without hammering RPC nodes.
Side effects
- Unknown chain alias returns null entry for that chain
- All chains unavailable returns stale:true with empty chain data
- Malformed chains query param returns 400 or falls back to all chains
- Native token price feed outage causes native_usd to be null, disabling USD estimates
- Payment not included or insufficient causes 402 Payment Required before data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"stale": false,
"chains": {
"base": {
"source": "https://mainnet.base.org",
"native_usd": 1829.645,
"native_token": "ETH",
"base_fee_gwei": 0.005,
"usd_estimates": {
"swap": 0.00219557,
"transfer": 0.000230535,
"erc20_transfer": 0.000713562
},
"gas_price_gwei": 0.006,
"cache_age_seconds": 0,
"priority_fee_gwei": 0.001
},
"ethereum": {
"source": "https://ethereum-rpc.publicnode.com",
"native_usd": 1829.645,
"native_token": "ETH",
"base_fee_gwei": 0.120496247,
"usd_estimates": {
"swap": 0.0438847,
"transfer": 0.0046079,
"erc20_transfer": 0.0142625
},
"gas_price_gwei": 0.119926866,
"cache_age_seconds": 0,
"priority_fee_gwei": 0.1
}
},
"findings": [
{
"rule": "l2_data_fee_excluded",
"detail": "base estimates are execution-gas only and exclude the L1 data fee"
}
]
}
}Tags
x402
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