Mantle Gas Tracker

Mantle runs on a modified version of the OP Stack — the same codebase behind Optimism and Base — but diverges from those chains in two ways that change what you pay. Gas is billed in MNT, Mantle's native token, not ETH. And Mantle doesn't run a live EIP-1559 fee market the way OP Stack chains normally do: this tracker reads a single legacy gas price over eth_gasPrice, not a base fee plus a priority-fee tip.

Like other OP Stack rollups, a Mantle transaction fee is really two costs added together: a small L2 execution fee for running your transaction, and an L1 data fee for publishing what changed to Ethereum for security — normally the larger of the two. Until April 2026, Mantle posted that data to EigenDA, an external data-availability network, to avoid paying Ethereum calldata prices. Its Arsia upgrade retired that path entirely: Mantle now publishes all transaction data as Ethereum blobs, the same EIP-4844 mechanism Optimism and Base use, so its L1 data fee now tracks Ethereum's blob market the way theirs does.

Mantle also changed how it proves its state is correct. For most of its history it relied on optimistic fraud proofs, giving withdrawals to Ethereum a roughly week-long challenge window. In September 2025 it switched to validity proofs generated by Succinct's SP1 zkVM (via OP Succinct), with an optional challenger-dispute period layered on top for extra safety. Proof generation is a security mechanism, not a cost billed to users — but it's why withdrawal timing on Mantle now looks different from a chain still running fraud proofs alone.

Mantle's own execution cost barely moves; nearly everything you see fluctuate traces back to Ethereum's blob market or the MNT/ETH exchange rate.

• Ethereum's blob base fee — Since the Arsia upgrade, Mantle's entire L1 data fee is priced off Ethereum's live blob base fee. A busy stretch on Ethereum mainnet raises Mantle's data cost the same way it raises Optimism's or Base's, regardless of Mantle's own traffic.
• The MNT/ETH exchange rate — The L1 data fee is fundamentally an Ethereum cost, but you pay it in MNT. The sequencer converts that ETH-denominated cost into MNT at the current exchange rate, so a sharp move in MNT's price against ETH changes your quote even when nothing on Ethereum has.
• Calldata and storage size — Transactions that touch more storage or carry larger calldata contribute more data to publish, so a complex contract call costs more to post than a simple transfer.
• Sequencer capacity — Mantle's own execution gas has spare capacity most of the time and stays a small fraction of the total fee, though sustained heavy demand on the network itself can still push it up.

Most Mantle confusion comes from assuming it behaves like the ETH-gas Layer 2s already on this list.

• You need MNT to pay for anything — Bridging ETH or another asset to Mantle doesn't give you anything to pay gas with — gas is billed specifically in MNT. Land with zero MNT and you can't move the asset you just bridged until you get some.
• There's no EIP-1559 fee market to negotiate — Wallets or scripts expecting maxFeePerGas and maxPriorityFeePerGas will only see a single legacy gas price on Mantle. That's the network's actual pricing model, not a misconfigured RPC.
• Withdrawal timing changed in 2025 — Older guides describe a roughly week-long withdrawal wait, from when Mantle relied solely on optimistic fraud proofs. Since its September 2025 move to SP1 validity proofs, withdrawals typically finalize in hours once the proof verifies.
• MNT replaced BIT — Mantle rebranded from BitDAO in 2023 and consolidated its token economy into MNT. BIT no longer functions as gas or governance here — an old BIT balance or address won't work on the current network.