Disclaimer: $RAP is only available on the Polygon Network

Make sure your 'pop ups' are enabled when using the following sites

Send $MATIC or $ETH to your metamask wallet from any exchange

Then send your $MATIC or $ETH from Metamask's
ETH chain to the Polygon chain. To do this, click the link in the following step

https://bridge.umbria.network/bridge/ethereum-polygon/matic

Copy this address:
0x71A7A85805f66C52faf9c1F9C4DbBE4b89e36a08

Go to Uniswap and connect to the Polygon Network. 

https://app.uniswap.org/#/swap

Click 'Select Token'











Paste the address: 
0x71A7A85805f66C52faf9c1F9C4DbBE4b89e36a08