Preventive controls work best when their scope is explicit. This collection connects endpoint review, resource limits, request filtering, and untrusted-content defenses. It does not treat unusual activity as automatic proof of an attack or promise that one layer catches every problem. Use the reading path to identify the condition a control should prevent, the evidence that it is working, and the limitations that require another layer. Validate changes in an authorized environment and preserve a deliberate plan for legitimate client recovery.
Prompt injection and API security: keep untrusted content out of control
Why valid requests can still carry unsafe instructions, and how to protect the boundaries around retrieval, tools, and output.
API rate limiting: protect capacity without breaking good clients
Move beyond one global request limit with endpoint budgets, bounded queues, and observable retry behavior.
API firewall vs WAF: choose the right control for the request
Understand where request filtering helps, what belongs in application authorization, and how to evaluate a layered deployment.
API security checklist: build a stronger first line of defense
A practical path from endpoint inventory to access controls, resource limits, and a release process your team can repeat.