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MATICBTCETHSOLBNBXRPUSDTDOGEADAAVAXDOTLINKMATICNo. Every OP Mainnet transaction fee is paid in ETH. OP is a separate governance and Retroactive Public Goods Funding token used in the Optimism Collective — it plays no role in paying for gas.
Yes. The chain was renamed from "Optimism" to "OP Mainnet" to distinguish the Ethereum Layer 2 itself from the broader Optimism Collective and Superchain ecosystem that also carries the Optimism name. Wallets and exchanges may still show either label for the same network.
Part of every OP Mainnet fee is priced off Ethereum's live blob base fee at the moment your batch posts. A busy stretch on Ethereum mainnet, or heavy blob demand from Base, Zora, or another Superchain chain sharing the same capacity, raises OP Mainnet's total fee even when its own traffic hasn't changed.
The OP Stack is the open-source rollup codebase OP Mainnet introduced. Coinbase's Base, Zora, Worldchain, and other Superchain members now run the same code, but OP Mainnet is the original chain it was built and proven on.
OP Mainnet turned on a permissionless fault-proof system built on the Cannon virtual machine, letting anyone challenge an invalid state root instead of only a whitelisted set of proposers. The roughly seven-day withdrawal window didn't get shorter, but it no longer depends on trusting a fixed set of parties to raise a challenge.
Roughly seven days through OP Mainnet's official bridge, which waits out a fault-proof challenge period before releasing funds on mainnet. Third-party bridges can deliver in minutes for a fee by fronting the liquidity themselves. Deposits onto OP Mainnet have no such delay.
They typically land in a similar range. All three post data to Ethereum as blobs, so the L1 side of the fee is now a small, comparable slice across them; differences come down to each chain's own execution demand at the moment. Check the multi-chain gas tracker for a live side-by-side.
There is no fixed number — check the tiers at the top of this page, which read OP Mainnet's live fee history rather than a cached average. In practice the execution fee barely moves; the total mostly tracks Ethereum's blob market.
No. This page reads public on-chain fee data through a public RPC endpoint. There is no sign-up, no wallet connection, and nothing about you is stored.
BTCETHSOLBNBXRPUSDTDOGEADAAVAXDOTLINKMATICBTCETHSOLBNBXRPUSDTDOGEADAAVAXDOTLINKMATICFree Tool
Real-time OP Mainnet gas price suggestions based on live on-chain fee history. See slow, average, and fast fee tiers — no sign-up required.
Base Fee
Current EIP-1559 base fee per gas unit
max fee
For non-urgent transactions. May take several blocks.
max fee
Balanced speed and cost for most transactions.
max fee
Priority inclusion in the next block.
Save on fees — swap ETH at the best rate
Try ZestHow do Optimism fees work?
Optimism is an Optimistic Rollup on the OP Stack. Your total fee has two components: the L2 execution fee (gas × gas price on OP Mainnet) plus a small L1 data fee for posting the transaction calldata to Ethereum.
What is the priority fee?
Also called a "tip", this is paid to the OP Mainnet sequencer. Because the sequencer operates the network, tips are typically very small — often negligible for routine transactions.
What is the OP Stack?
OP Stack is Optimism's open-source rollup framework, shared by Base, Zora, and many other chains. It standardizes how L2s interact with Ethereum for security and data availability, enabling a shared ecosystem.
OP Mainnet is the original Optimistic Rollup built on the OP Stack — the open-source codebase that Coinbase's Base, Zora, Worldchain, and dozens of other Superchain members now run too. It isn't just a reference implementation; it's the chain the design was proven on before anyone forked it. Every fee on OP Mainnet is paid in ETH. The OP token has no role in gas — it exists for governance and for funding public goods through the Optimism Collective, not for paying transaction costs.
Like every OP Stack chain, an OP Mainnet transaction fee is two charges added together. The L2 execution fee covers the compute OP Mainnet itself performs and follows its own EIP-1559-style base fee, which spends most of its time near the protocol floor since the chain has far more spare throughput than it typically uses. The L1 data fee is your share of the cost of posting a compressed batch of OP Mainnet transactions back to Ethereum as a blob, priced off Ethereum's base fee at the moment of posting — the same blob market every rollup, including the chains that forked OP Mainnet's own code, draws from.
OP Mainnet was also the first chain to prove the OP Stack's newest security upgrade: in mid-2024 it turned on a permissionless fault-proof system built on the Cannon virtual machine. Before that, only a small, whitelisted set of proposers could challenge an invalid state root; now anyone can, without special access. That change didn't shorten the roughly seven-day window before a withdrawal finalizes on Ethereum, but it removed the trusted-party assumption fault proofs used to rest on.
OP Mainnet's own execution fee rarely explains a price move — most swings trace back to what's happening outside the chain.
Most OP Mainnet confusion comes from its naming and governance model, not the fee mechanics themselves.
Want the fundamentals first?
Our explainer covers gas units, gwei, base fees, and how Layer 2s like OP Mainnet cut costs, with worked examples.
Read: Understanding gas feesReal-time Ethereum gas price suggestions for slow, average, and fast speeds — powered by live on-chain fee history.
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Compare real-time gas fees side-by-side across ETH, Arbitrum, Base, Optimism, Polygon, BSC, and Avalanche. Track costs for transfers, swaps, and NFT mints.
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Live Beacon Chain stats — current staking APR, total ETH staked, active validator count, and entry/exit queue depth.
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