First navigate to the networks tab in your MetaMask then click on add network. Here you'll be asked for the network name, chain_id, RPC url, and currency symbol. Name and symbol don't matter much here but are good for staying organised.

The most important fields are chain id and RPC url.

• 80001

For the RPC, feel free to use the following public RPCs but keep in mind the network traffic.

• https://rpc-mumbai.matic.today
• https://matic-mumbai.chainstacklabs.com
• https://rpc-mumbai.maticvigil.com
• https://matic-testnet-archive-rpc.bwarelabs.com

You can also get you own dedicated URL at the following. Personally, I use Alchemy.

• Alchemy
• Moralis
• Infura

• MetaMask
• IPFS
• ethers.js
• Hardhat
• NextJS
• Tailwind CSS

The networks are configured to both the MATIC Mumbai testnet, as well as mainnet, with Alchemy as the RPC provider. However, as I strongly advocate against art theft in the NFT space, I will not be deploying to mainnet. This is to provent the trade of the free stock images I use for testing purposes.

This is not an attempt at a large scale marketplace the likes of OpenSea and Rarible, so functionality is kept to just the essentials for transactions, minting, and display.