Tool detail

base-gas-x402

Returns live Base mainnet gas: EIP-1559 base fee, low/medium/high priority tiers in gwei, and a transaction cost estimate for a given gas limit.

Categories: Market prices, Onchain data

Use when

get current Base gas price tiers (low, medium, high)
estimate transaction cost for a specific gas limit

Not for

not historical gas price trends

Inputs

GET query param: gasLimit (integer 21000-30000000, optional, default 21000)

Admitted input schema

{
  "type": "object",
  "properties": {
    "gasLimit": {
      "type": "integer",
      "minimum": 21000,
      "maximum": 30000000,
      "description": "Gas units to price the cost estimate against. Defaults to 21000 (a plain ETH transfer). Use ~65000 for an ERC-20 transfer, ~85000 for an NFT mint, ~180000 for a Uniswap swap, or ~1500000 for a contract deploy.",
      "default": 21000
    }
  },
  "required": [],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://base-gas-x402-production.up.railway.app/gas

Payment

Protocol: x402
Listed price: 0.005 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://base-gas-x402-production.up.railway.app/gas
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z