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Vextorium Multi-Chain Gas Price Comparator
x402
Vextorium Multi-Chain Gas Price Comparator is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-13).
Returns real-time gas prices and estimated USD transaction costs (native transfer, ERC-20 transfer, swap) across Base, Ethereum, Arbitrum, Optimism, and Polygon, plus the cheapest chain for swaps.
Price / call$0.004
Success—
StatusUnknown
How this service works
Gas price right now on Base, Ethereum, Arbitrum, Optimism and Polygon, with the estimated USD cost of a native transfer, an ERC-20 transfer and a swap on each, and the cheapest chain.
Output
A JSON object with per-chain data including: network name, native token, gas price in gwei, estimated USD cost of a swap, ERC-20 token send, and native transfer; plus the name of the cheapest chain for swaps and current USD prices of native tokens (ETH, POL). A note clarifies that L2 chains incur an additional L1 data fee not included in the estimates.
Example use cases
Find cheapest chain before a DeFi swap
“Before I do a token swap, can you tell me the current gas costs in USD for a swap on Base, Arbitrum, Optimism, Ethereum, and Polygon so I can pick the cheapest one?”
Gas cost dashboard for a multi-chain app
“Pull the latest gas prices in gwei and estimated USD costs for native transfers, ERC-20 transfers, and swaps on all five supported chains — Base, Ethereum, Arbitrum, Optimism, and Polygon.”
Decide where to send ERC-20 tokens cheaply
“I need to send some USDC to a friend — which of the five EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon) is cheapest for an ERC-20 transfer right now, and what will it cost in USD?”
Technical details
Endpoint
POSThttps://api.vextorium.com/gas-comparar-pago?utm_source=zero.xyzWhen to prefer
Prefer this endpoint when you need a single call to compare gas costs across all five major EVM chains simultaneously, including USD-denominated estimates for common transaction types. Ideal for agents helping users decide which chain to use before executing a DeFi operation, or for building gas dashboards. Not suitable if you need historical gas data, per-contract estimates, or chains beyond Base, Ethereum, Arbitrum, Optimism, and Polygon.
Side effects
- Upstream RPC or gas oracle unavailability may cause null values for specific chains
- Polygon swap/token transfer costs may return null if POL price is unavailable
- Gas price data may be slightly stale if upstream nodes are lagging
- Network congestion spikes can cause estimates to be outdated within seconds of fetching
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"nota": "En los L2 (Base, Arbitrum, Optimism) se suma una pequeña tarifa de datos a L1 que no se incluye aquí.",
"redes": [
{
"red": "base",
"nativo": "ETH",
"gas_gwei": 0.006008,
"swap_usd": 0.00293,
"envio_token_usd": 0.00106,
"transferencia_usd": 0.00034
},
{
"red": "ethereum",
"nativo": "ETH",
"gas_gwei": 0.902926,
"swap_usd": 0.44,
"envio_token_usd": 0.15889,
"transferencia_usd": 0.05133
},
{
"red": "arbitrum",
"nativo": "ETH",
"gas_gwei": 0.020012,
"swap_usd": 0.00975,
"envio_token_usd": 0.00352,
"transferencia_usd": 0.00114
},
{
"red": "optimism",
"nativo": "ETH",
"gas_gwei": 0.001004,
"swap_usd": 0.00049,
"envio_token_usd": 0.00018,
"transferencia_usd": 0.00006
},
{
"red": "polygon",
"nativo": "POL",
"gas_gwei": 277.023823,
"swap_usd": null,
"envio_token_usd": null,
"transferencia_usd": null
}
],
"mas_barata_swap": "optimism",
"precios_nativos_usd": {
"eth": 2707.22696629,
"pol": null
}
}
}Tags
x402
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