Top 10 API Security Tools for REST (2026)

APIs are now the #1 attack vector. Attacks jumped 400% last year. Most developers secure the front door (WAF) but leave the back window (API logic) open.

To fix this, you need tools that:

1. Find every API (even the ones you forgot).
2. Test for logic flaws like BOLA (Broken Object Level Authorization).
3. Block attacks in real-time.

Here are the top 10 tools to lock down your REST APIs in 2026.

The Top 10 Tools

1. Salt Security

Best for: Real-time attack blocking. Salt uses AI to learn your API's normal traffic patterns. When something weird happens (like a user scraping 10,000 records), it blocks them.

• Killer feature: Finds "zombie" APIs you didn't know existed.

2. Akamai API Security

Best for: Massive scale + Edge protection. If you already use Akamai's CDN, this is a no-brainer. It blocks attacks at the edge, before they hit your servers.

• Killer feature: Deep integration with Akamai's WAF.

3. 42Crunch

Best for: Fixing design flaws early. 42Crunch scans your OpenAPI (Swagger) files. It finds security holes in your design before you write a single line of code.

• Killer feature: "Positive security model"—if requests don't match the spec, they get blocked.

4. Traceable AI

Best for: Microservices and observability. Traceable combines distributed tracing with security. It sees the full path of a request across services, which is key for catching complex logic attacks.

• Killer feature: Detects if an API is leaking PII (Personal Identifiable Information).

5. StackHawk

Best for: Developers (CI/CD). StackHawk runs DAST scans in your CI/CD pipeline. It helps you catch bugs before production.

• Killer feature: "Curl command reproduction"—gives you a curl command to reproduce the bug instantly.

6. Akto

Best for: Finding BOLA vulnerabilities. Akto connects to your traffic and instantly builds an inventory. It specializes in finding broken authorization logic (e.g., User A accessing User B's data).

• Killer feature: Huge library of built-in "puzzler" tests for logic flaws.

7. APIsec

Best for: Automated pentesting. APIsec acts like a robotic pentester. It writes thousands of test cases to try and break your API logic.

• Killer feature: Zero-touch deployment. It just works.

8. Invicti

Best for: Enterprise scanning with proof. Invicti verifies vulnerabilities ("Proof-Based Scanning") so you don't waste time on false positives.

• Killer feature: Detailed compliance reporting for GDPR, HIPAA, etc.

9. OWASP ZAP

Best for: Free / Open Source. The industry standard for free testing. It's powerful, scriptable, and has a huge community.

• Killer feature: It's free. Great for learning.

10. Wallarm

Best for: Unified Web + API defense. Wallarm combines a Next-Gen WAF with API security. It protects against both SQL injection (web) and logic abuse (API).

• Killer feature: Low latency inspection.

Don't Just Scan. Write Secure Code with AskCodi.

Tools find bugs after you write them. AskCodi helps you write secure code first.

AskCodi is an AI coding assistant that can enforce Secure-by-Design principles:

1. Secure Boilerplate: AskCodi generates code with security baked in—hashed passwords, rate limits, and input validation are default, not optional.
2. Vulnerability Checks: Highlight a function and ask: "Is this secure?" AskCodi spots injection risks and logic flaws instantly.
3. Abuse Testing: AskCodi writes unit tests that try to break your code. It generates malicious payloads to verify your defenses work.
4. Dependency Audits: It scans your imports and warns you if you're using a library with known vulnerabilities.

The Bottom Line: Scan your APIs with Salt or StackHawk. But build them with AskCodi. Shift security left, catch bugs early, and ship faster.

Start building secure APIs with AskCodi.