Tool detail

gas

Returns live EIP-1559 gas pricing (base, priority and max fee) and estimated USD transfer cost for one or more EVM chains.

Categories: Onchain data

Use when

check current gas fees on Base, Ethereum, Optimism, Arbitrum or Polygon
compare gas costs across up to 5 EVM chains in one call

Not for

not for EVM chains outside base, ethereum, optimism, arbitrum or polygon

Inputs

GET query params (optional): chain (default "base"; or ethereum/optimism/arbitrum/polygon), chains (comma-separated list, max 5).

Admitted input schema

{
  "type": "object",
  "properties": {
    "chain": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "EVM network: base (default), ethereum, optimism, arbitrum, or polygon"
    },
    "chains": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Comma-separated list of chains (max 5) to compare in one call"
    }
  },
  "required": [],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://api2ls.com/api/gas

Payment

Protocol: x402
Listed price: 0.01 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://api2ls.com/api/gas
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z