The Etherscan-family explorer for the OP Mainnet layer-2
Last updated: July 2026
Optimistic Etherscan is the official Etherscan-built block explorer for OP Mainnet, the flagship chain of the Optimism / OP Stack ecosystem. It brings Etherscan's full feature set to Optimism: transaction and address lookup, Solidity contract verification and source viewing, token and NFT tracking, gas tracking, analytics, and a complete API. As one of the original Ethereum layer-2 rollups and the foundation of the broader Superchain, OP Mainnet hosts substantial DeFi and app activity, and Optimistic Etherscan is the standard tool for verifying contracts, tracing transactions, and inspecting L1↔L2 message passing and withdrawal proofs specific to optimistic rollups. Developers get the familiar read/write contract UI and fully decoded logs, and the Etherscan V2 API consolidation means one key now serves Optimism alongside Ethereum, Base, Arbitrum, and the rest via a chainid parameter. Browsing is free; Pro tiers add higher API limits, watchlist alerts, private notes, and monitoring. The caveats are consistent with the family: closed-source, centrally operated, and scoped to OP Mainnet only — teams wanting an open-source explorer across the many OP Stack chains often use Blockscout instead. But for OP Mainnet specifically, Optimistic Etherscan is the canonical, best-supported explorer.
Optimistic Etherscan offers a free plan. Paid plans start at $19/month.
Optimistic Etherscan
Free
Optimistic Etherscan
$19/mo
$190/yr billed annually
Optimistic Etherscan
$99/mo
$990/yr billed annually
| Feature | Optimistic Etherscan |
|---|---|
| Transaction History | ✓ |
| Contract Verification | ✓ |
| Token Tracking | ✓ |
| Nft Tracking | ✓ |
| Api Access | ✓ |
| Multi Chain Support | ✗ |
| Gas Tracker | ✓ |
| Source Code Viewer | ✓ |
| Address Labels | ✓ |
| Private Notes | Pro plans |
Yes, Optimistic Etherscan has a free plan. Paid plans start from $19/month.
Optimistic Etherscan is used for the etherscan-family explorer for the op mainnet layer-2. It's primarily used by Web3 teams in the Block Explorers category.
See our full alternatives comparison at https://chainpick.io/alternatives/optimistic-etherscan.
Optimistic Etherscan has a rating of 4.3/5 based on 347 reviews. Key strength: Canonical explorer for OP Mainnet. Main limitation: Closed-source and centrally operated.
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