Does consuming another EPiServer site's content require an extra license?

Hi!

 A friend of mine told me that if I have a non-EPiServer website which consumes content from an EPiServer website, then an extra EPiServer-license is required. Is this true?

 Lets say I have a scenario like the following:

 I have an EPiServer site with cooking recipes called EPiCookingRecipes. On each site page there's a cooking recipe.

 Now a friend of mine has another site, NonEPiCookingRecipes, which is a simple ASP.NET MVC site not using EPiServer at all.

 In the EPiCookingRecipes site, I build a Web API exposing all recipes for use by my friend on his NonEPiCookingRecipes site.

 My friend - on his NonEPiCookingRecipes site - consumes API-data in the form of cooking recipes from my EPiCookingRecipes site.

 Would this require an extra EPiServer license?

If yes, can someone point me to the place where this is provided in the license agreement?