OP Mainnet

This page lists what Farbeam reads on OP Mainnet. Live values are on the OP Mainnet data page. The API returns the same facts from Get a chain.

#What is indexed

Head, fees and recent blocks only. Large transfers are not stored on this chain. The curated tokens below are used for wallet balances and wallet activity.

#Curated tokens

The curated tokens page explains the list and its prices.

#Sources

#Measured values

These figures are a snapshot from the API at 2026-11-04T19:33:40.039Z UTC. They are examples, and they change on every poll. They are not targets.

#Quirks

• No index. large_transfer_index is false. /transfers?chain=optimism returns an empty page with status 200, and a rule with chain == "optimism" is valid but never matches. Indexing here is Planned.
• Lookups work. Wallet overview, Wallet activity, Token report and Transaction lookup read the chain directly.
• Very low base fee. base_fee_gwei read 2.94e-07 in the capture. Read fields as numbers, not fixed-point strings.
• Shared WETH address. 0x4200000000000000000000000000000000000006 is also WETH on Base.
• Not every USD token. Only the native USDC is listed here. USDC.e is not.

#Try it

curl -s "https://farbeamlabs.com/api/v1/chains/optimism"

const res = await fetch("https://farbeamlabs.com/api/v1/chains/optimism");
const { data } = await res.json();
console.log(data.status.status, data.status.head, data.tokens.length);

import requests

data = requests.get("https://farbeamlabs.com/api/v1/chains/optimism", timeout=30).json()["data"]
print(data["status"]["status"], data["status"]["head"], len(data["tokens"]))

Since this chain has no index, use Recent blocks and Gas and fees for chain-level data, and use direct lookups for addresses.