> For the complete documentation index, see [llms.txt](https://docs.bitcoints.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bitcoints.org/bitcoin-token-standards.md).

# Bitcoin Token Standards

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* **What Are Token Standards?** Token standards are the set of rules, conditions, and functions that dictate how a crypto token works.
* Popular token standards on Ethereum are ERC-20, ERC-223 and ERC-721. Similarly, popular token standards on Bitcoin are BRC-20, BRC-223 and BRC-721.
* **What is Bitcoin Request for Comment (BRC)?** BRC is essentially a set of technical documents containing guidelines on developing a smart contract.