Using web apps from my web app
<p>As the title says, am I allowed to use other web applications from my own one (to generate data or to convert files), even though they don't provide an API (which I had to build myself), as long as their terms don't explicitly forbid such behavior?</p>

<p>I know it is a short description, but the question really is that simple.
I could not find the answer elsewhere.</p>

<p>Thank you in advance.</p>

<p>If their terms don't prohibit it and you are accessing their resources responsibly and through regular channels, there's no reason to think it would be s problem. That said, you should reach out to the owners of those apps anyway for at least two reasons:</p>

<ol>
<li><p>To alert them to your plans and ask permission and for any instructions to avoid causing issues. Worst case, you get no answer and are back at square 1. Otherwise, you know where you stand and don't have to worry.</p></li>
<li><p>Leaving aside the legal aspect - you don't want to take a dependency whose owner is unaware of that dependency. I mean, if you want your app to work at easy every now and then.</p></li>
</ol>

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