API Security MVP means locking that door with the fastest, tightest, most practical setup possible — without waiting months for a full enterprise rollout. It’s about building the minimum viable security that still holds against real threats. Speed matters. Coverage matters. Precision matters.
The core of an API Security MVP is knowing what to protect, how to protect it, and how to test it before attackers do. That starts with inventory. Map every endpoint. Know which ones are public, private, or internal. Track authentication methods. Catalog sensitive data flows. You can’t guard what you can’t see.
Next, authentication and authorization. Enforce strong, token-based authentication for every endpoint that should be protected. Implement role-based or attribute-based access control. Remove unused keys. Rotate secrets. Secure the handshake before the data flows.
Input validation is non-negotiable. Every request should be sanitized and verified against expected formats. SQL injections, command injections, and other payload attacks remain common because they still work against sloppy endpoints. Build strict checks that fail fast.