API Security Analyzer
Scan APIs for vulnerabilities and security best practices
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Who checks your endpoints before they go live? Does anyone read the token handling, or does it ship because the tests passed? Security review is the task everyone agrees matters and nobody has time for. API Security Analyzer reads the code you paste in, points at the weak spots, explains each risk and shows a safer version.
Short answer: API Security Analyzer is a free tool on EizTools that reviews code or an API design you paste in. It lists likely weaknesses, explains the risk in plain English, suggests a fix and can map findings to OWASP categories.
What is API Security Analyzer?
It is a review tool, not a scanner. API Security Analyzer works only on the text you give it, so it reads a route handler, a middleware file or a written description of how your service authenticates. It then reports what looks unsafe and what you should tighten. It sits with the other coding tools on EizTools.
Important This tool does not connect to your server, probe a live host or run a penetration test. It reviews what you paste, so treat the findings as a second pair of eyes, not as proof.
How Does API Security Analyzer Work?
The prompt box asks you to paste the code or describe the system you want reviewed. Pick a model from the selector, open the advanced options accordion, then generate. Findings appear in the output card with copy, listen and downloads as TXT, Word or HTML. The activity history panel keeps this session's reviews, so you can reopen an earlier one and compare.
What To Paste In So The Review Lands
Context separates a useful finding from a generic warning. Paste the handler, then add two or three lines saying who calls it and what the data is worth. Say the route is public, or that it returns another user's records, because that changes which issue matters most.
Express route below. Public, no gateway in front.
Takes user_id from the query string.
Returns the full user record including email.
Token is checked in middleware I have not pasted.Four lines like that turn a list of style notes into a review that spots the missing ownership check on user_id. If the code is already throwing, fix that first with the Error Fixer, then come back.
Who Runs A Review Like This
Backend developers
A quick sanity read on an endpoint you wrote alone, before it reaches a pull request.
Reviewers
A second opinion when you are reviewing a service written in a language you rarely touch.
Learners
Students and junior developers who want the reason behind a warning, not only the label.
Focus, Severity And Strictness Explained
| Option | What it controls | Where to start |
|---|---|---|
| Security Focus | Narrows the review to one theme | General first, then Authorization |
| Severity Filter | How much noise reaches you | High & Above on a busy file |
| Output | The format the review arrives in | Findings + Fixes |
| Strictness | Slider from 1 to 100 for how picky it is | Around 70 for real code |
- Language covers Auto-Detect plus Python, JavaScript, TypeScript, Java, C#, C++, Go, PHP and Ruby
- Four switches control Explain the Risk, Suggest a Fix, Show Secure Code and Map to OWASP
- Custom Instructions holds your own policy notes, such as a rule your team already follows
EizTools is a free AI tools platform, and every tool works without an account, a quota or a payment. The API Security Analyzer uses the same surface as the rest: one prompt box, a model selector you can change per generation, options tuned to this job, and downloads on every result. A second model family often surfaces what the first review skipped.
Frequently Asked Questions
Does API Security Analyzer scan my live API?
No. It never touches your server. It reads the code or description you paste into the prompt box, which is why the quality of the review depends on how much context you include.
Is it free to use?
Yes. It is free on EizTools with no account, no credit counter and no daily cap. Paste your code, pick a model from the selector and generate as often as you need.
Should I paste real secrets or tokens?
No. Replace keys, passwords and tokens with placeholders before pasting. The review still works, because it looks at how a secret is handled, not at its value.
What does Map to OWASP do?
It tags each finding with the matching OWASP category. That is useful when you need to explain a fix to a reviewer or record it against a checklist your team already follows.
Can this replace a professional security audit?
No. It catches common mistakes and explains them well, but it cannot see your infrastructure, your dependencies or your traffic. Anything handling payments or personal data still needs a qualified reviewer.
Most breaches start with something ordinary, such as an endpoint that trusts an id from the query string. Getting a plain reading of your own code, with the reason attached and a safer version beside it, catches those before anyone else finds them.
Paste a handler in the box above, set the focus and the strictness, then work through the findings one at a time.
Sabir Bepari
Founder of EizTools and a passionate AI enthusiast dedicated to building practical, user-friendly AI tools that simplify everyday tasks.
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