Identify who is calling the API and what they are allowed to do.
: Use tools like Joi or Zod to enforce data types, lengths, and formats (e.g., ensuring an email is actually an email). API CheatSquad
: Provide enough info for a developer to fix the issue without leaking sensitive system details (like stack traces). 4. Rate Limiting & Throttling Identify who is calling the API and what
: Limit the number of calls a single API key or IP address can make per minute/hour. and formats (e.g.
A feature is only "solid" if others can use it correctly without constant help.