I believe you wanted to refer to Robo in the case of "something that makes your application capable of consuming Price data from somewhere", in the case of consuming data from a price database for example, or consuming data from an ok API ("Application Programming Interface").
Actually there are several ways to understand your doubt, as you spoke in Javascript it would be interesting to open an idea for you to consume this data via "Ajax" for example, where through your programming in Jscript you will direct a request for "GET" for your web application to consume your Pricing data, for example by an API returning this data in JSON (Javascript Object Notation) format. Then this data would be arranged in a URL for example: http://xxxx_precos_de_products , where they would be in a format like this: { "_idproduto" : "001", "nome_produto":"chuteira", "preco_produto":"150,00"}
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As I mentioned above there are other ways to consume data, through queries directly to the database via querys and SQL (Structured Query Language), for example, using languages such as PHP, Java, Python, etc.
See that there are many ways and ways to consume data! I tried to clarify your doubt in a simple way, since it is starting and every beginning is really confusing, but go ahead, study, seek information and succeed! Hug.
Dude.... What you want is not a robot, but a program. Try to improve the quality of your question, because I hardly understand it (what does javascript have to do with the question??).
– riki481