> For the complete documentation index, see [llms.txt](https://docs.pearl.exchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pearl.exchange/dex-operations/supported-tokens.md).

# Supported Tokens

Token integration must adhere to following guidelines.

* Standard ERC20 token (EIP-20)
* Fee on transfer
* Rebase

**Tokens supporting user-initiated rebase mechanisms and experiencing negative rebases won't operate as expected on PearlV2.**

User-initiated rebasing tokens can claim pair-wide rebases, potentially causing liquidity providers to lose their yield. Similarly, negative rebasing can lead to losses for liquidity providers when their position becomes active, without any means of recuperating these losses.

For integration, developers are advised to utilize the special swap routes `exactInputSingleFeeOnTransfer` and `exactInputFeeOnTransfer`, specifically designed to handle rounding for rebase and fee-on-transfer tokens.