ZAP VS SonarQube

I use ZAP [1] with the OAST add-on for this at the moment. I admit the UX isn't perfect, but it serves my purpose.

If I also want control over the responses (e.g. return a 401 status code for every fifth request), I have a custom extender script [2] for that.

[1]: https://www.zaproxy.org/

Implement tools like Burp Suite or OWASP ZAP for in-depth security scanning of your APIs.

OWASP ZAP

Caido[1] a interception proxy written in Rust, is positioning itself as a "lightweight" alternative to Burp. It can't compete yet with Burp in terms of functionality, although it's certainly looking promising.

Perhaps one of few contenders to Burp in respect to features is ZAP[2].

[1] https://caido.io/

[2] https://www.zaproxy.org/

The use of capital punctuation implies a warning? an alert? Would this same response be warranted for Burp which is also a commercial, closed source product?

If this is an issue for some, then ZAP being open source[1] maybe favourable.

That said, Burp is the defacto tool for a reason - it's best in class. Every pentester I know, including myself, has a paid subscription. The fact that it's closed source hasn't been an issue.

[1] https://github.com/zaproxy/zaproxy

Briefly reviewed your product. Seems like OWASP ZAP is your competition: https://www.zaproxy.org/

It runs entirely in the browser so it uses the browser "native" frameworks.

Dynamic analysis involves testing your application while it's running. Tools like OWASP ZAP and Burp Suite can help identify vulnerabilities like SQL injection or Cross-Site Scripting by sending malicious requests to your application and analyzing the responses.

In addition to manual security reviews, you can also implement DevSecOps practices to automate security checks. For example, you can set up a CI/CD pipeline to run static code analysis tools like CodeQL and automatically run penetration tests using tools like OWASP ZAP.

OWASP ZAP (open source)

I would start by installing Burp Suite or OWASP Zap and seeing what the actual messages look like

SonarQube (Scroll down to the Sonarqube section to see instructions on how to set up and configure SonarQube manually)

SonarQube https://www.sonarqube.org/

There are commercial tools that can be integrated into a CI pipeline and/or a developer's IDE. I've used SonarQube before, but there are others.

having a code review and analysis tool in CI/CD pipeline can help developers to keep their code clean. some examples of these tools are sonarqube and embold.

Sonarqube Source Code Repository

The generated classes should be put into .gitignore. Otherwise, if you have Checkstyle, PMD, or SonarQube in your project, then generated classes can violate some rules. Besides, if you don't put them into .gitignore, then each pull request might become huge due to the fact that even a slightest fix can lead to lots of changes in the generated classes.

SonarQube allows all developers to write cleaner and safer code. It supports lots of programming languages for scanning (Java, Kotlin, Go, JavaScript). It also supports running unit testing for code coverage. It can be easily integrated with Jenkins and Azure DevOps. Checkmarx, Veracode, and Klocwork also provide similar functionality but these are paid tools.

As for some of our tech stack outside of Next.js for those curious, we use Sass to define CSS and its globals, Jenkins for our CI/CD pipeline, and Sentry for error tracking, all of which have been great to work with so far. Within our testing suite, we utilize Sonarqube, Lighthouse, aXe Core, WebPageTest, @next/bundle-analyzer, and run tests written with Cypress.