Fast Protocol is a mev-sharing protocol + RPC stack built on top of mev‑commit. Its tokenized incentive alignment is a uniquely enabled novelty in the mev ecosystem, and allows the protocol to return the highest level of mev rebates to users, which can exceed the amount their transactions generate (>100%).
Instead of mev being quietly captured by searchers and builders, Fast Protocol:
Captures mev via FAST RPC backruns
Accumulates that value in a protocol treasury (in ETH)
Redistributes it in $FAST to users
The result is the first tokenized mev rewards protocol: mev becomes a programmable, on‑chain revenue stream shared with the entire transaction supply chain.
Users can get >90% mev refunds, outperforming existing OFAs.
Validators earn ~5% of mev (similar to other OFAs).
Opted-in validators earn ~95% of mev (5% normal profit + 90% profit share)
On the technical side, the underlying settlement and fee logic is handled by mev‑commit and a pair of mev distribution contracts on L1 and the mev‑commit chain. These contracts collect protocol fees and mev, and split and distribute between users, the protocol, and validators.
When you send a transaction through FAST RPC:
Simulation & mev auction
The RPC simulates and auctions off your transaction and places profitable backrun trades in a bundle, sending it directly to staked blockbuilders over mev-commit to be preconfirmed in milliseconds.
Decaying bid instead of priorityFees
On mev‑commit, transaction bundles are attached bids that decay over time rather than relying on per‑transaction priority fees (gas tips). This means:
Users can submit transactions without setting priorityFees.
FAST RPC manages the bidding logic under the hood.
Builders are incentivized to commit early, improving inclusion speed.
Mev flows into the protocol
When the bundle settles, the backrun mev and protocol fees are routed into:
The mev distribution contracts, and
Ultimately, the protocol treasury, denominated in ETH.
Tokenized rewards are paid out
Instead of raw ETH or per transaction refunds, Fast Protocol turns this mev into $FAST token rewards:
Users of FAST RPC receive tokenized mev refunds based on how much mev their order flow generated.
Protocol Treasury accumulates additional ETH that can be used to grow the protocol or reward token holders.
From a user’s perspective, it feels like sending a normal transaction but faster, with better execution, and you actually get paid for mev beyond what your transactions generate. Fast Protocol unlocks the first token to gain direct exposure to mev on Ethereum, and not just mev from your transaction.
Fast Protocol is designed so that opting in is the strictly rational move for validators.
Opted‑in validators
Earn their normal blockbuilder / mev‑boost yield.
Plus up to ~95% of the mev generated by FAST RPC flows in their slot, via mev directed to them instead of being redirected upstream in the pipeline.
In other OFAs, this mev is auctioned off and rebated to users at a per-transaction basis and never enters the transaction pipeline.
Validators earning at least 5.6% of their block value through Fast Protocol can pay a 5% fee to maintain the economic flywheel of the protocol.
They also benefit from tokenized mev rewards that originate from treasury accumulation driven by protocol usage.
Non‑opted‑in validators
Still get a tiny, standard-OFA‑like slice of the pie (around the ~5% range typical in existing OFAs).
But ~90%+ of the incremental mev from FAST RPC flows is withheld from them and kept in the protocol treasury, where it is reallocated as user and token incentives.
Economically, this creates a compelling story:
As more validators opt in, more mev‑rich order flow routes to FAST RPC and mev‑commit, which increases block value for opted‑in validators and makes non‑participation strictly less profitable over time.
Fast Protocol’s economics make a formal claim:
There cannot be a protocol that pays back more mev to users than Fast Protocol, while still remaining in equilibrium.
Roughly, here’s the intuition:
Other OFAs typically return up to 90% of mev to users, keeping ~10% for the transaction supply chain, of which validators end up with only ~5% after fees.
FAST RPC routes mev into a shared pool (validators, blockbuilders, users, protocol)
The protocol dynamically tunes how mev fees are split between:
User refunds
Validator fees
Protocol treasury
The model shows an equilibrium where:
Users converge to getting ~90%+ of their mev back (can be even more than 100%), making it strictly better than existing OFAs from a user’s perspective.
Opted‑in validators earn more than they do with other OFAs or by staying out because their slots attract disproportionate mev‑rich flow.
The protocol always gets a positive share of mev flowing through the system.
If another OFA tried to pay more than this, it would either:
Make builders unprofitable, so they’d stop participating, or
Require unsustainable subsidies that can’t hold in equilibrium.
That’s why the team can confidently say Fast Protocol is the best‑paying OFA design in steady state by construction. The design is mathematically constrained, incentive-compatible, and self-stabilizing under normal market conditions.
Historically, mev has been a PvP arena:
Users lose value via worse prices and failed transactions. Modern mev systems have improved this, but constrained mev rebates to the transaction level.
Searchers and builders battle each other for extractable value.
Validators get a thin sliver of mev at the very end of the pipeline.
Fast Protocol changes that by aligning incentives across the full transaction supply chain; users, wallets, dapps, builders, relays, validators, and token stakers on a single platform.
Key alignment points:
Users: get Ethereum-wide mev refunds and better execution.
Wallets & dapps: by integrating FAST RPC, they offer their users direct upside from Ethereum-wide mev instead of hidden extraction or per-transaction rebates.
Validators: earn strictly more by opting in, and help speed up the transaction supply chain and enable new types of mev.
Protocol: collects mev fees that can be used for growth or incentive activities.
For the first time, everyone is literally paid to cooperate.
Instead of paying out raw ETH in isolation, Fast Protocol tokenizes mev:
Mev is captured in ETH via FAST RPC backruns and mev‑commit fees, and accumulates in the protocol treasury.
The treasury can be used to fund $FAST rewards for:
FAST RPC users (based on their mev contribution).
Incentive programs for the growth of the protocol.
As adoption grows:
More mev flows through FAST RPC.
More value is routed into the treasury.
Demand for $FAST increases.
This sets up a positive reinforcement loop:
More usage → more mev → more value in protocol for token rewards → stronger token utility → more incentive for users/validators to route flow through FAST RPC → even more mev.
Because the protocol is continuously using real, on‑chain mev to fund rewards, the token’s underlying value can be justified with actual network activity, not just speculation.
(This is not a guarantee of price outcomes but about how the mechanism is designed; not a promise of returns.)
On top of the core protocol, the team is rolling out a “killer app” with a new type of mev that will be announced soon, as well as:
A DeFi portal on Ethereum mainnet at https://fastprotocol.io where users can use DeFi “Fast”, routing their swaps and other DeFi actions through FAST RPC and earning tokenized mev rewards in the process.
Launch partners will be featured in this portal so users can interact with familiar DeFi protocols while automatically participating in mev sharing.
Any wallet or dapp that integrates FAST RPC will plug into the same mev-sharing system; users of those apps will also be participating without additional complexity.
If you’re a DeFi user, dapp builder, wallet, or validator and want to get ready:
Sign up at https://fastprotocol.io to get early access. Add Fast RPC to your wallet and stay tuned for the full rollout of Fast Protocol.
Follow Fast Protocol on X to catch announcements, launch partners, and validator integration guides.
Join the Discord to talk directly with the team and community, ask integration questions, and help shape the roadmap.
Read the Technical Documentation and the Math behind Fast Protocol
See you on Ethereum, Fast.