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Introducing the USD Prime Vault: Treasury-Backed Yield on Your USD

You’re always moving money around. Between bills, subscriptions, and the next big purchase, your dollars can sit idle.

Now, KAST Earn gives you another option to make that balance work.

With the USD Prime Vault, you can earn yield on USD through USDKY, a 1:1 backed stablecoin powered by M0. Yield is generated by short-term U.S. Treasury Bill reserves and reflected in the value of USDKY over time.

It sits alongside the existing Gauntlet Alpha Vault, which uses dynamic DeFi strategies to generate yield.

How the USD Prime Vault Works

When you deposit into the USD Prime Vault, your USD is converted into USDKY, which is held directly in your Privy wallet (Privy is a Stripe company). You maintain control of your assets at all times.

USDKY accrues yield, which is reflected in the value of your vault balance. As yield accrues, the redemption value of USDKY increases.

While both Gauntlet and the USDKY token offer yield, the mechanism behind each is completely different.

Feature Gauntlet Alpha Vault USD Prime Vault
Funds Flow USDC is transferred to your wallet and then deposited onchain in a third-party vault. Direct mint: USDKY is transferred to your Privy wallet and accrues yield while held in it.
Yield source Third-party DeFi strategies. Treasury-backed: Yield is generated by underlying Treasury reserves.
Infrastructure Uses external third-party vaults. Held in your dedicated Privy wallet.
Provider External DeFi providers (for example, Gauntlet strategies). No DeFi strategy provider: Yield accrues directly from Treasury-backed reserves.

How to Use the USD Prime Vault

The USD Prime Vault is designed to work alongside your USD Spending Balance.

You can move funds into the vault when they’re not being used, and withdraw at any time.

Earnings are realized when you withdraw funds to your USD spending balance.

There are no deposit caps or lockups. The APY is variable and reflects current performance, so it may fluctuate and is not guaranteed.

To get started, tap Earn, select USD Prime Vault, and enter your deposit amount.

Review the estimate, then tap Confirm.

What You Should Know

What exactly is USDKY?

USDKY is a 1:1 backed stablecoin powered by M0. When you deposit into USD Prime, your USD is converted into USDKY, which is held in your own Privy wallet.

How does USDKY derive its value?

USDKY derives its value from underlying M collateral (primarily short-term U.S. Treasury Bills), and the yield generated by that collateral is reflected in the value of USDKY over time.

Is the yield fixed?

No. APY is variable and reflects real-time market conditions, specifically the yield on short-term U.S. Treasury Bills. The current APY is always visible in the KAST app.

Can I access my funds anytime?

Yes. Withdrawals from USDKY to your USD Spending Balance are near-instant.

Are the funds onchain?

Yes. USDKY is issued on Solana and held in your Privy wallet. You can view the wallet address and token balances onchain using a Solana explorer.

Put Your USD to Work

If you keep USD on hand for bills, subscriptions, and everyday spending, the USD Prime Vault gives you a way to make that balance work. Instead of sitting idle, your USD can earn yield from Treasury-backed reserves via USDKY, directly within KAST Earn.

You still keep full flexibility. When it’s time to spend, simply redeem back to your USD Spending Balance. A simpler way to put idle dollars to work with Treasury-backed yield, inside KAST Earn.

     

Disclaimer: This content is for general informational purposes only and does not constitute investment, legal, tax, or financial advice. Digital assets involve high risk and may result in total loss. Please do your own research and consult professional advisors before making any decisions. Read full disclaimer here.

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KAST Adds In-App Affiliate Sign-Up and Portal Access

You’ve probably talked about KAST without even thinking about it. Maybe someone asked how you receive USD from abroad. Maybe they were curious how you actually spend stablecoins in daily life. Maybe you dropped your referral link in a group chat and moved on.But you never really know what happens next.Now you can turn those casual conversations into something structured and measurable — without creating a separate account or searching for signup pages. You can apply to the KAST Affiliate Program directly inside the app.There are no extra logins, no separate platforms to manage, and no added friction. It starts exactly where you already are.Why Apply Inside The App?Most affiliate programs sit outside the product experience. You usually have to search for the right signup page, create a separate login, manually connect your referral code, and then switch between different dashboards just to keep track of everything. It often feels disconnected from the product you’re actually using.With KAST, the process starts inside the app. You simply go to Home → Refer → Become an Affiliate.Because it’s built into your existing account, your email stays aligned, your referral code remains the same, and your identity is already verified. There’s no need to recreate information or manage a separate profile.Keeping everything in one place reduces friction, minimizes back-and-forth during review, and makes the whole process more straightforward.How The Application Process WorksStep 1: Apply From The AppOpen your KAST app and go to:Home → Refer → Become an AffiliateThen:Tap ReferTap Become an Affiliate (top corner)The application form opens in your browser.It’s short and focused. You’ll be asked for:Your affiliate code (from the app)Name, phone number, and KAST emailPrevious affiliate experience (if any)Optional links (Telegram, LinkedIn, etc.)Your main channels and audience countriesA short note about how you plan to promote KASTSubmit the form. That’s it.Step 2: Get Access To The PortalAfter internal review, approved applicants receive access to the Affiliate Portal.From there, you can:Track referrals in real timeMonitor rewardsSee which content drives resultsOptimize how you promote KASTYou don’t need to change how you share. You just gain visibility into performance.See what actually drives sign-upsImagine you run a Telegram group about digital payments and crypto tools.Members often ask:How do you receive USD from clients?How do you spend stablecoins locally?How does the KAST Card work in daily life?You’ve been sharing your referral link casually. Some people sign up — but you don’t know how many, or why.After applying through the app and getting approved, that changes.Now you can see:Which posts generate sign-upsWhich use cases resonate mostWhether your audience responds more to the KAST Card or Local PayoutsInstead of guessing, you have data.Instead of casually sharing, you’re running something structured.How This Fits Into the KAST EcosystemMost affiliates promote what they already use. In practice, that means they talk about real things they do in KAST. For example, they receive USD into their KAST Global USD account, hold stablecoins like USDC, and spend globally with the KAST Card. They also use local payouts to convert funds into local currency when they need to.When your content reflects real usage, referrals feel natural. You are not pushing a product. Instead, you are showing how you use KAST in daily life. People understand the value because they see it in context.The Affiliate Program simply adds tracking and structure to what you already do inside KAST.What It CostsThere is no fee to apply.If approved, commissions and rewards are visible inside the Affiliate Portal.Eligibility criteria, reward structures, and approval timelines may change and are subject to internal review.Quick Checklist Before You ApplyYou actively use KASTYou have an audience (community, social media, newsletter, etc.)You can explain real use cases clearlyYou’re willing to promote responsiblyIf that sounds like you, the process takes just a few minutes.Ready To Apply?Open the KAST app and go to:Home → Refer → Become an AffiliateOr learn more at:https://www.kast.xyz/affiliateStart in the app.Apply in minutes.Track everything in one place.
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