Is It Legal to Reverse Engineer a Competitor’s API?

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice.
Hypothetical question

Looking for advice on this situation. Is It Legal to Reverse Engineer a Competitors API? Anyone been in this spot?

Details: I'm in a situation where I need to understand my legal options. Has anyone dealt with something similar?

Illustrative response

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