Optimism gas price

$0.003 per call · failed calls are never charged · no account or API key needed

Get current gas on Optimism: gas price, base fee and suggested priority fee in gwei, plus what a plain ETH transfer (21,000 gas) costs right now. Takes no input. Use before sending a transaction or to decide whether to wait; for the fee a past transaction actually paid use op_receipt.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/op/gas?format=json"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/op/gas?format=json&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum, Monad, World Chain or Tempo) and retries.

Example result

{
  "chain": "Optimism",
  "chainId": 10,
  "gasPriceGwei": "0.015",
  "baseFeeGwei": "0.012",
  "priorityFeeGwei": "0.001",
  "transferCost": "0.000000315",
  "symbol": "ETH",
  "block": 123456789
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is op_gas, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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