> ## Documentation Index
> Fetch the complete documentation index at: https://yieldxyz.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Curve

> Supply crvUSD to Curve lending markets on Ethereum, Arbitrum, and Optimism, or deposit it into Curve Savings for scrvUSD.

yield.xyz exposes two Curve crvUSD integrations. **Curve lending** markets (yield type `lending`) take crvUSD and lend it to borrowers of one collateral asset per market. **Curve Savings** (yield type `vault`) takes crvUSD on Ethereum and returns scrvUSD. Both are ERC-4626 vaults, so your position is a share token whose value grows as interest accrues.

<Note>
  Curve liquidity pools are a separate integration: see [LPing with Curve](/documentation/earn/defi/lping/curve).
</Note>

## Availability

| Integration | Yield type | Networks | Deposit token | Share token |
| - | - | - | - | - |
| Curve lending | `lending` | Ethereum, Arbitrum, Optimism | crvUSD | One ERC-4626 share per market |
| Curve Savings | `vault` | Ethereum | crvUSD | scrvUSD |

Every lending market takes crvUSD, so each market's yield is named after its collateral asset, for example "Curve: Lend crvUSD (WETH)". Several markets share a network and deposit token, which means you pick a market by yield ID rather than by token. List the markets enabled for your project with [`GET /v1/yields`](/api-reference/YieldsController_getYields) filtered by `providers=curve`.

## Entering

An enter action approves crvUSD and deposits it into the chosen market or into Curve Savings. The vault mints its share token to your address, with no warmup period.

## Exiting

Exits redeem shares for crvUSD in the same transaction: there is no cooldown or withdrawal queue. You can exit by `amount`, by share amount, or with `useMaxAmount` for a full exit. yield.xyz caps the redeemed amount to what the vault reports as redeemable for your address.

<Warning>
  A lending market can only return crvUSD that borrowers are not currently using. If utilization in that market is high, an exit can fail or be capped below your full balance until liquidity returns.
</Warning>

## Rewards and position

Interest accrues into the share price for both integrations. There is no claim step and no separate incentive token. Your balance is the share position valued in crvUSD; see [balances and positions](/documentation/earn/core-concepts/balances-positions).

## Next steps

<Columns cols={2}>
  <Card title="Lending" icon="hand-holding-dollar" href="/documentation/earn/defi/lending/index">
    Compare Curve with the other lending integrations.
  </Card>

  <Card title="Action lifecycle" icon="arrows-rotate" href="/documentation/earn/core-concepts/actions">
    Request, sign, and submit enter and exit actions.
  </Card>
</Columns>


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