Can I batch call multiple tokens' current price data?

Yes. You can either use

• /simple/price endpoint;
• /simple/toke_price/{id} endpoint; or
• /coins/markets endpoint

Note that for /simple/price endpoint and /simple/toke_price/{id} endpoint, only current price data would be returned. 

If you'd like other market data such as trading volume, circulating supply, ATH, ATL and more to be returned as well, the /coins/markets endpoint would be more suitable. Please note that it is by default paginated and returns 100 prices per call, but you can increase that to 250 by adjusting the per_page parameter.

Note: You CANNOT get more than 250 coins per call with the /coins/markets endpoint, since it is paginated to return a maximum of 250 coins per call.