# overview

Source: [https://docs.curve.finance/developer/amm/legacy/stableswap/deposit-contracts/overview](https://docs.curve.finance/developer/amm/legacy/stableswap/deposit-contracts/overview)

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## Curve Stableswap Exchange: Deposit Contracts

Curve pools may rely on a different contract, called a *deposit zap* for the addition and removal of underlying coins. This is particularly useful for lending pools, which may only support the addition/removal of wrapped coins. Furthermore, deposit zaps are also useful for metapools, which do not support the addition/removal of base pool coins.