Is it possible to buy cryptocurrency for another cryptocurrency (for example buy ETH using BTC) using Binance api. Cuz when i was searching inside binance api docs i didn't find anythins similar
Yes you can.
To sell BTC for ETH, you will need to place a BUY order on the symbol ETHBTC. In order to create an order from API, you can use the general endpoint POST /api/v3/order. Hope this can be helpful.