Cesto Partners with Para
How Para's MPC wallets power every rebalance on Cesto, delivering managed portfolio convenience with full self-custody security.
How Cesto Rebalances Your Portfolio Without Touching Your Keys
Para's MPC wallets power every auto-rebalance on Cesto — so you never have to choose between convenience and self-custody.
Every investment basket on Cesto auto-rebalances. When your allocations drift, the portfolio adjusts. Swaps execute, weights reset, assets stay in your wallet. It sounds simple — until you ask the obvious question: if Cesto never holds my keys, who's signing those transactions?
1. The custody trade-off nobody talks about
Most platforms that manage your portfolio need access to your wallet. That's how they rebalance, harvest yield, and execute trades on your behalf. It's convenient. It also means someone else controls your funds.
The entire point of on-chain investing is ownership. But the moment you hand over signing authority for convenience, you've given that up. You're back to trusting an intermediary — just a different one than your bank.
This is the tension we refused to accept when building Cesto. We wanted auto-rebalancing and full self-custody. The industry consensus was that you pick one.
2. What Para built
Para is wallet infrastructure for developers. Their core technology is MPC — multi-party computation — applied to private key management.
Here's the short version: instead of storing your private key in one place, Para splits it across multiple independent parties. No single party — not Para, not Cesto, not anyone — ever holds the complete key. The key literally never exists in one place.
When a transaction needs to be signed, the parties collaborate to produce a valid signature without ever reconstructing the full key. It's cryptographically equivalent to a normal signature, but the attack surface is fundamentally different. There's no single server to hack, no single database to breach, no single point of failure.
Para has 10M+ wallets in production, is SOC 2 Type II certified, and has been audited by Least Authority. They power wallet infrastructure across Solana, EVM, and Cosmos chains.
3. How it works on Cesto
Every Cesto user gets a Para-powered MPC wallet when they sign up. It's invisible — you don't need to know it's there. You just see your basket, your holdings, your wallet.
When your basket drifts from its target allocation, here's what happens:
- Cesto detects the drift and calculates the rebalance trades needed
- The transaction is sent to Para's MPC wallet for signing
- Para's distributed key shares produce a valid signature — without the full key ever existing
- The signed transaction executes on Solana — swaps route through Jupiter, tokens land back in your wallet
- Your basket is rebalanced. Your keys never left your control.
The whole process takes seconds. You can review every transaction. Nothing happens without your authorization.
4. What this means for you
If you're using Cesto today, you've already been using Para. Every basket purchase, every rebalance, every swap — it all runs through Para's MPC infrastructure.
The practical upside is simple: you get the convenience of a managed portfolio with the security of self-custody. No trade-off. No fine print. No "we promise we won't misuse your keys" — because nobody has your keys to begin with.
This is also why we can offer auto-rebalancing across every basket type — from tokenized stocks (via Ondo Finance) to crypto tokens to DeFi yield positions. The rebalancing layer is wallet-agnostic. Para handles the signing. Cesto handles the strategy.
5. Why this matters beyond Cesto
The industry is moving toward this model. The idea that users should hand over their keys to get a good experience is dying — not because of ideology, but because the infrastructure finally exists to do it differently.
A year ago, this stack wasn't mature enough. MPC wallets existed, but the developer tooling, the chain support, and the signing speed weren't there for production use. Para changed that. And Cesto is proof that you can build a full investing platform on top of it without compromising on either side of the convenience-custody spectrum.
We're not the only team building on Para. But we might be the clearest example of why MPC wallets matter — because the alternative is asking users to trust you with their money, and we'd rather not.
Explore baskets on Cesto — fully non-custodial, fully auto-rebalanced.
