Besides http://analytics.muesliswap.com/ticker - are there any other APIs that return token price?
There is this from minswap: https://api-mainnet-prod.minswap.org/coinmarketcap/v2/pairs
or this minswap blockfrost adapter: https://github.com/minswap/blockfrost-adapter
Definitely yes! For Cardano use the following CoinGecko API:
market_data.current_price key you will find the current price of the fiat & cryptocurrency you want of $ADA.
For more info regarding the API. Read the docs https://www.coingecko.com/en/api/documentation