# Exchanges Cryptocurrency exchanges facilitate the trading of cryptocurrencies for other assets, including digital and fiat currencies. In effect, cryptocurrency exchanges act as an intermediary between a buyer and a seller and make money through commissions and transaction fees. When shoppers pay to merchants, they can connect their exchanges, such as Coinbase, OkCoin, Gemini, etc., and pay using those exchanges. The balance is also tracked and shown on iFrame for each cryptocurrency available in the exchange to make the shoppers aware of the same. ![](/files/3CvkzxRh9jKsbWKIpTMo) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.rocketfuel.inc/core-concepts/exchanges.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.