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Vextorium EVM Gas Estimator
x402
Vextorium EVM Gas Estimator is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).
Estimates gas cost and recommended gas limit for a transaction on EVM-compatible chains (Base, Ethereum, Arbitrum, Optimism, Polygon, etc.) before submitting it.
Price / call$0.003
Success—
StatusUnknown
How this service works
558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.
Output
Returns the estimated gas units, recommended gas limit (estimated * 1.2), gas price in gwei, estimated transaction cost in native token (e.g. ETH), the network name, native token symbol, and a boolean indicating whether the transaction is executable without reverting.
Example use cases
Pre-flight check before DeFi swap
“I'm about to swap tokens on Ethereum via a contract call — can you estimate the gas cost first? The sender is 0x1234...abcd, the contract address is 0xUniswapRouter, data is 0x38ed1739..., and I'm sending 0 ETH value.”
Arbitrum contract deployment cost estimate
“Estimate how much gas it'll cost to deploy a contract on Arbitrum — the sender is 0xDev...wallet and the transaction data is 0x608060...”
Check if transaction is executable on Polygon
“Can you check whether this transaction is actually executable on Polygon and tell me the expected gas units and cost? From 0xMy...wallet to 0xToken...contract with data 0xa9059cbb... and no ETH value.”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/evm-estimate-gas?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, pay-per-call gas estimate across 12 major EVM chains without running your own node infrastructure. It's ideal for AI agents that need to pre-validate transaction cost and executability before submitting, or for building gas-aware workflows in DeFi automation. Prefer it over raw RPC calls when you want a normalized response with both estimated and recommended gas in a single call.
Side effects
- Transaction simulation reverts — executable=false is returned with null cost fields
- Invalid or malformed from/to address causes a 400-level error
- Unsupported network name causes validation failure
- Missing required fields (from, a) returns a schema validation error
- Node RPC unavailability may return a 5xx or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| a | string | |
| data | string | |
| from | string | |
| value | number | |
| network | string | Chain (default base) |
Output
Schema · Response
{
"type": "json",
"example": {
"native": "ETH",
"network": "base",
"executable": true,
"estimated_gas": 30989,
"estimated_cost": 1.859e-7,
"gas_price_gwei": 0.006,
"recommended_gas": 37186
}
}Tags
x402
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