Fluid

Supply assets into Fluid lending vaults for yield

What this yield is

• Protocol: Fluid lending vaults (by Instadapp)
• Asset: USDT, USDC, WETH, wstETH, sUSDS, and more
• Receipt token: fTokens (e.g., fUSDT, fUSDC)
• Additional rewards: FLUID tokens
• Networks: Ethereum, Arbitrum, Base, Polygon, Plasma

Fluid vaults are ERC-4626 compliant. Rewards accrue automatically via the pricePerShare parameter, and fTokens are redeemable for the underlying token at any time.

Required inputs

Parameter	Description
yieldId	The specific Fluid vault yield ID
address	User’s wallet address
amount	Amount to deposit

Actions & lifecycle

Enter

Action: Deposit assets into Fluid vault

• Supply the underlying asset
• Receive fToken representing your share
• Yield accrues automatically via pricePerShare

Exit

Action: Withdraw assets from the vault

• Redeem fTokens for underlying assets
• Receive principal plus accrued interest
• Instant withdrawal

Example flow

1. Get yield metadata

   Fetch available Fluid vaults and their current rates.

2. Enter position

   Call the enter action with your deposit amount.

3. Sign & submit

   Sign the transaction and broadcast to the network.

4. Track balances

   Monitor your position via the balances endpoint.

Get yield metadata

curl --request GET \
  --url 'https://api.yield.xyz/v1/yields/ethereum-usdt-fusdt-0x5c20b550819128074fd538edf79791733ccedd18-4626-vault' \
  --header 'accept: application/json' \
  --header 'x-api-key: <API_KEY>'

Operational notes

No pending actions

Fluid vaults have no pending actions. All rewards accrue automatically via the pricePerShare mechanism.

ERC-4626 standard

Fluid vaults follow the ERC-4626 standard, making them compatible with most DeFi integrations.

Multi-network availability

Fluid is available on Ethereum, Arbitrum, Base, Polygon, and Plasma networks.

Yield IDs for this protocol

Show Fluid yield IDs

Yield ID pattern: {network}-{asset}-f{asset}-{contract}-4626-vault

Ethereum

Yield ID	Name
ethereum-usdt-fusdt-0x5c20b550819128074fd538edf79791733ccedd18-4626-vault	fUSDT Fluid Vault
ethereum-usdc-fusdc-0x9Fb7b4477576Fe5B32be4C1843aFB1e55F251B33-4626-vault	fUSDC Fluid Vault
ethereum-weth-fweth-0x90551c1795392094FE6D29B758EcCD233cFAa260-4626-vault	fWETH Fluid Vault
ethereum-wsteth-fwsteth-0x66C25Cd75EBdAA7E04816F643d8E46cecd3183c9-4626-vault	fwstETH Fluid Vault
ethereum-susds-fsusds-0x2bbe31d63e6813e3ac858c04dae43fb2a72b0d11-4626-vault	fSUSDS Fluid Vault

Arbitrum

Yield ID	Name
arbitrum-usdc-fusdc-0x1A996cb54bb95462040408C06122D45D6Cdb6096-4626-vault	fUSDC Fluid Vault
arbitrum-usdt-fusdt-0x4A03F37e7d3fC243e3f99341d36f4b829BEe5E03-4626-vault	fUSDT Fluid Vault
arbitrum-weth-fweth-0x45Df0656F8aDf017590009d2f1898eeca4F0a205-4626-vault	fWETH Fluid Vault
arbitrum-arb-farb-0xbE3860FD4c3facDf8ad57Aa8c1A36D6dc4390a49-4626-vault	fARB Fluid Vault

Base

Yield ID	Name
base-weth-fweth-0x9272d6153133175175bc276512b2336be3931ce9-4626-vault	fWETH Fluid Vault
base-usdc-fusdc-0xf42f5795d9ac7e9d757db633d693cd548cfd9169-4626-vault	fUSDC Fluid Vault
base-eurc-feurc-0x1943fa26360f038230442525cf1b9125b5dcb401-4626-vault	fEURC Fluid Vault

Polygon

Yield ID	Name
polygon-usdc-fusdc-0x571d456b578fdc34e26e6d636736ed7c0cdb9d89-4626-vault	fUSDC Fluid Vault
polygon-usdt-fusdt-0x6f5e34eff43d9ab7c977512509c53840b5efba85-4626-vault	fUSDT Fluid Vault
polygon-weth-fweth-0xd3154535e4d0e179583ad694859e4e876eb12d24-4626-vault	fWETH Fluid Vault

Plasma

Yield ID	Name
plasma-usde-fusde-0xd8f824d4252cae7d5e49b95d47b0efafe6f2d570-4626-vault	USDe Fluid Vault
plasma-weth-fweth-0x5e494e8912319cefb1d4fa516807bb65a8cb9e40-4626-vault	WETH Fluid Vault

See also

Quickstart

Get started with Yield.xyz

Actions & Balances

Understand how actions work