# MRC-20

## What is MRC-20?

MRC20s are tokens similar to BRC20s that are generated passively by holding MRC721s. Compared to BRC20 and ARC20, the unique feature of MRC20s is that users do not need to manually inscribe mints. Our custom indexer calculates available balances of your MRC20s based on your MRC721 holdings and how long you've held them. MRC20s inherit the transfer operation from BRC20, which is how users will be able to transfer and sell their MRC20s.

## Parameter Example

<figure><img src="https://lh7-us.googleusercontent.com/CRTg_4Kr3o2I0YZiq9SYnf-mCAloB6qDfF3xE66tyA0efDMXOFkLZOWseJ50Wf-b02IU6qxOx_N24hPHBiGuNkFbukoe71HmFZ1toOEhzdhJH_-vaxK1iL0Gabq2R837uhTKLS670YnT4PIGAXdFPtw" alt=""><figcaption></figcaption></figure>

In this example:

* "p": "mrc-20" indicates an operation under the MRC-20 protocol.
* "op": "transfer" specifies that this is a transfer operation.
* "tick": "ordi" represents the symbol for the token.
* "amt": "100" denotes a transfer quantity of 100.
* "dec": "8" signifies that the token has 8 decimal places.

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