> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crossmint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Deprecating Polygon Mumbai and Releasing Polygon Amoy support on Staging

> Transition from Polygon Mumbai to Polygon Amoy testnet with timeline for Mumbai deprecation and Amoy integration

**Starting April 13, 2024, Polygon Mumbai will no longer be supported as Polygon Mumbai will be fully deprecated. Polygon Amoy will be supported on Staging starting April 10, 2024.**

<Note>Action may be required if you're currently using Mumbai with Crossmint</Note>

## Using Amoy for Collections on Staging

* The chain identifier for Polygon Amoy testnet is `polygon-amoy`.
* You can use them in all APIs that support a chain selector, including
  Minting APIs (e.g.
  [Create NFT Collection](api-reference/minting/collection/create-collection))
  and wallets (e.g.
  [Get NFTs from Wallet](api-reference/wallets/get-nfts-from-wallet)).

If you have further questions regarding this, we are here to help. Contact
**[Crossmint Support](https://help.crossmint.com/hc/en-us/requests/new?ticket_form_id=9718928922893/?utm_source=docs)**.