Hi, I've been looking for an isekai manga where the main character has stealth as a skill. In the story the main chaacter was accused of killing the captain of the knights. I also remember that the king and princess of the country are up to no good, they summoned the whole class and had them appraised but because of his stealth skill he managed to avoid the process.

Sounds like this is what you're looking for.

https://www.mangaupdates.com/series.html?id=149362