> ## 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.

# Fluid

> Supply stablecoins, WETH, or wstETH to Fluid lending vaults on Ethereum, Arbitrum, Base, Polygon, and Plasma.

Fluid (by Instadapp) runs lending vaults that pay interest from borrower demand. You deposit an asset and receive an ERC-4626 share token, `f`-prefixed, whose redemption value rises as interest accrues.

## Availability

| Network | Representative input tokens | Share token |
| - | - | - |
| Ethereum | USDC, USDT, GHO, USDtb, sUSDS, wstETH, WETH | `f` + input symbol, for example `fUSDC` |
| Arbitrum | USDC, USDT, GHO, sUSDS, wstETH, ARB, WETH | same pattern |
| Base | USDC, GHO, sUSDS, wstETH, EURC, WETH | same pattern |
| Polygon | USDC, USDT, wstETH, AUSD, WPOL, WETH | same pattern |
| Plasma | USDe, USDT0, WETH | same pattern |

Query [`GET /v1/yields?providers=fluid`](/api-reference/YieldsController_getYields) for the live list per network; do not assume every token above has a vault on every network.

## Entering

You approve the input token and deposit it; the vault mints `fToken` shares in return. On Ethereum, Arbitrum, and Base, the WETH vault also accepts native ETH: pass no `inputToken` (or the native symbol) and yield.xyz wraps it before depositing. The Polygon and Plasma WETH vaults only accept the ERC-20 token, since neither network's native gas asset wraps to the vault's input token.

## Exiting

Exits are instant: no cooldown or withdrawal queue. Request an exit with `amount`, `shareAmount`/`shareAmountRaw`, or `useMaxAmount` for a full exit. The Ethereum, Arbitrum, and Base WETH vaults unwrap the redeemed WETH back to native ETH as a follow-up transaction.

## Rewards and position

Interest accrues automatically into the share price; there is no manual claim step. Select vaults also list an additional incentive token in their reward metadata (`FLUID` on most networks, plus `ARB` on some Arbitrum vaults and `WPOL` on some Polygon vaults). No Fluid vault exposes a manual `CLAIM_REWARDS` action; every vault's `rewardClaiming` is auto.

## List the live yields

Copy this request to list the Fluid yields enabled for your project. Yield IDs change as markets and networks are added, so query the API rather than hardcoding them.

```bash theme={null}
curl "https://api.yield.xyz/v1/yields?providers=fluid&limit=100" \
  -H "x-api-key: $YIELD_API_KEY"
```

## Next steps

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

  <Card title="Action lifecycle" icon="arrows-rotate" href="/documentation/earn/core-concepts/actions">
    How enter and exit actions are signed and submitted.
  </Card>
</Columns>


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