base-gas-x402 | Apiosk Gateway

Base URL

https://gateway.apiosk.com/cbz-base-gas-x402-production-up-railway-app

Technical Specs

Auth MethodNone (x402 payment proof only)

Response FormatJSON

Endpoints1

Endpoints

Method	Path	Description	Cost
GET	/gas	Live Base mainnet gas: EIP-1559 base fee, low/medium/high priority tiers in gwei, and a transaction cost estimate for any gas limit.	$0.0057 default	View details

Endpoint documentation

GET/gas

$0.0057 default

Description

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

Pricing

$0.0057 default

Parameters

{
  "properties": {
    "gasLimit": {
      "default": 21000,
      "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.",
      "maximum": 30000000,
      "minimum": 21000,
      "type": "integer"
    }
  },
  "type": "object"
}

Example response

{
  "baseFeePerGas": "0.012",
  "blockNumber": "12345678",
  "chain": "base-mainnet",
  "chainId": 8453,
  "estimatedTransferCost": {
    "eth": "0.000000294",
    "gasLimit": 21000,
    "gwei": "294"
  },
  "fetchedAt": "2026-06-22T00:00:00.000Z",
  "gasPrice": "0.014",
  "priorityFeePerGas": {
    "high": "0.004",
    "low": "0.001",
    "medium": "0.002"
  }
}