We operate Kaisersolver on CoW Protocol and build the open source software beneath it, from node tooling to backtesting. We track everything we learn and use it to expand the solver space, and the infrastructure behind it, for the teams that come next.
WORK
3
CHAINS LIVE
Solver
A CoW Protocol solver competing to route each order at the best price available. Built by Kaisersolver and operated by Fiftysix, the US entity of record. It holds no inventory and never holds anyone’s funds.
Learn More →50,000+
DOCKER IMAGE DOWNLOADS
Nodes
Free, open source software for running your own blockchain node. One command brings up Bitcoin, Ethereum, Arbitrum, Base, BNB Smart Chain, Litecoin, Dogecoin or IPFS, on almost any computer.
Learn More →200
CLONES ON DAY ONE
Readiness
An open method for telling whether a CoW Protocol solver is ready for production before it goes live: replay real auctions against its endpoint and score the result into one verdict. Already run by another solver team.
Learn More →SOLVER
Most of what decides whether a solver works has nothing to do with its code. Start here: what the protocol asks for, what it costs, and how to test your engine against real auctions first.
What the protocol asks for beyond code, and what an operator of record carries.
→What it takes to take part, what it takes to win, and what comes out before anyone is paid.
→Replay real CoW auctions against your solver, offline, and see whether it would have won.
→BACKGROUND
Fiftysix was founded by Daniel Peter, who has spent nine years building the kind of infrastructure the company now operates. He was co-founder and CEO of Capsule, has worked with Visa, Lido and Quantstamp, and has been quoted in Fortune on Bitcoin Ordinals.
“Three things I grew up with and still work by. If you do something, do it right. Good isn’t good enough. Don’t take anything for granted.” – Daniel Peter, Founder of Fiftysix
HOW WE WORK
If you have an engine and no company behind it, or liquidity that should be reaching CoW traders, this is what you get from us.
Get in touchOurs
When something breaks, the cost lands on us, not on you.
Learn
We track what we learn and grow the solver space with it.
Peers
We would rather get there with people than ahead of them.