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EVM Multi-Chain Gas Comparison
x402
EVM Multi-Chain Gas Comparison is a paid API for AI agents from chain.cyberwarex.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).
Compares current gas prices, base fees, priority fees, and estimated transaction costs across major EVM chains in a single call, identifying the cheapest chain.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call EVM chain data for agents: wallet snapshots, ERC-20 token profiles, spot prices, gas markets, transaction decode, and ENS resolution across major EVM chains (base, ethereum, arbitrum, optimism, polygon). Deterministic JSON, no RPC keys or node infra needed.
Output
Returns a JSON object listing all queried EVM chains with their current gas price, base fee, and priority fee percentiles (p25/p50/p75) in gwei, the native token's USD price, estimated costs for a standard token transfer (21k gas) and a swap (200k gas) in both USD and native units, and a 'cheapest' field identifying the lowest-cost chain.
Example use cases
Cheapest chain for DeFi swap
“I'm about to do a $200k swap — which EVM chain has the lowest gas fees right now and what would the swap actually cost me in USD on each one?”
Cost-aware cross-chain routing
“Before I bridge and execute my transaction, tell me the current gas costs on Base, Arbitrum, Optimism, and Polygon so I can pick the cheapest network.”
Gas market monitoring dashboard
“Pull the latest gas prices, base fees, and priority fee percentiles for all major EVM chains and tell me which one is cheapest to transact on right now.”
Technical details
Endpoint
GEThttps://chain.cyberwarex.com/gas-compare?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a single-call cross-chain gas comparison without managing RPC keys or node infrastructure. Ideal for agents routing transactions to the cheapest EVM network, DeFi bots optimizing execution costs, or dashboards showing real-time multi-chain gas markets. Prefer this over querying individual chain gas endpoints separately when you need a unified cheapest-chain recommendation.
Side effects
- Chain RPC unavailable or degraded — may return partial results or error for that chain
- Payment not received or insufficient USDC — returns 402 Payment Required
- Invalid or malformed request — returns 400 Bad Request
- Gas oracle data momentarily stale — costs may lag real-time by a few seconds
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 5,
"chains": [
{
"chain": "base",
"native": "ETH",
"est_cost": {
"swap_200k": {
"usd": 0.0035,
"native": 0.0000014
},
"transfer_21k": {
"usd": 0.00037,
"native": 1.5e-7
}
},
"native_usd": 2456.1,
"base_fee_gwei": 0.005,
"gas_price_gwei": 0.006,
"priority_fee_gwei": {
"p25": 0.001,
"p50": 0.001,
"p75": 0.002
}
}
],
"cheapest": "base"
}
}Tags
x402
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