Optimistic Etherscan
Block explorer for OP Mainnet built by the Etherscan team, with L1 to L2 and L2 to L1 transaction views.
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Optimistic Etherscan key facts
| Category | Block explorer |
|---|---|
| Chains | OP Mainnet |
| Platforms | Web, API |
| Company | Etherscan (Built by Team Etherscan) |
| Chains | OP Mainnet, OP Sepolia Testnet |
| Pricing | Lite $49/mo, Standard $199/mo, Advanced $299/mo, Professional $399/mo, Pro Plus $899/mo; OP Mainnet is paid tier only |
What is Optimistic Etherscan?
Optimistic Etherscan is the Etherscan team's block explorer for OP Mainnet. It lists L1 to L2 and L2 to L1 transactions next to regular blocks and contracts. Its API is Etherscan API V2, where OP Mainnet is a paid-tier chain: API access starts at the $49 a month Lite plan.
Optimistic Etherscan pros and cons
- Shows L1 to L2 and L2 to L1 transactions
- Same interface and labels as Etherscan
- One Etherscan API key covers OP Mainnet and other chains
- OP Mainnet API access is not on the free tier; it starts at $49/month
- API Pro endpoints start at the $199/month Standard plan
Optimistic Etherscan FAQ
What is Optimistic Etherscan?
Optimistic Etherscan is the Etherscan team's block explorer for OP Mainnet. It lists L1 to L2 and L2 to L1 transactions next to regular blocks and contracts. Its API is Etherscan API V2, where OP Mainnet is a paid-tier chain: API access starts at the $49 a month Lite plan.
Which chains does Optimistic Etherscan support?
OP Mainnet.
How much does Optimistic Etherscan cost?
Lite $49/mo, Standard $199/mo, Advanced $299/mo, Professional $399/mo, Pro Plus $899/mo; OP Mainnet is paid tier only, according to Optimistic Etherscan’s own page (checked Sep 26, 2026).
Sources
How this page works
Sources: Optimistic Etherscan: official site, Optimistic Etherscan: About us, Etherscan: Supported chains. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.