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What is Barker Yield Engine?

Barker Yield Engine lets you offer your users non-custodial USDC yield through a per-partner BarkerEngine smart contract. You earn a configurable share of yield via on-chain fee split — no subscription fees, no usage billing, all settlement happens on-chain in real time.

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Two ways to integrate

You pick one of two integration modes. Both run against the same engines, the same APIs, the same on-chain fee split — they only differ in where the deposit/withdraw UI lives.

Embed (iframe)

Drop a single line of HTML into your app. We render the deposit/withdraw UI, handle wallet connection, gas, transaction confirmations, APY display.Best when you want the fastest possible launch and don’t need to control every pixel.

Headless API

Build your own deposit/withdraw UI on top of our REST API. Your frontend talks to your users’ wallets directly and calls the engine contract with standard ERC-4626 functions. We provide data, metrics, and read-only helpers.Best when flow must be inline (KYC → deposit → confirmation), or UI must stay fully on your domain.
Not sure which one fits? See Choosing an integration mode.

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How it works

  1. We deploy a dedicated BarkerEngine contract for your account on the chain you choose (Base / Arbitrum / Ethereum / BNB).
  2. Your users deposit USDC into the engine — through the embed iframe or through your own UI calling the engine directly.
  3. The engine deposits to a curated underlying ERC-4626 vault selected for that chain.
  4. Yield is generated. Each accrueFee() call splits yield as barkerFeeBps + partnerFeeBps, minting engine shares to both barkerFeeRecipient and your partnerFeeRecipient.
  5. You can redeem() your accumulated shares anytime, or leave them compounding.
Key properties:
  • 100% non-custodial: user funds always traceable on chain
  • Per-partner engine: AUM and fees independently verifiable
  • No SaaS billing: revenue model is partnerFeeBps percentage of yield
  • Multi-chain: same API surface across all supported chains
  • Multi-tier ready: offer 3 risk profiles (conservative / balanced / aggressive) by registering 3 product slugs — see Multi-tier products

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Next steps