# Password Strength Evaluator MCP for AI Agents AI Agent Connect

> Password Strength Evaluator lets your AI agents perform high-accuracy security audits on credentials. It uses the zxcvbn engine to calculate entropy, identify patterns, and estimate how long a hacker would take to crack a password. Stop relying on basic regex and start using real math to enforce security. It replaces subjective guessing with objective data, making it a must-have for any security-conscious developer or SecOps professional.

## Overview
- **Category:** loved-by-devs
- **Price:** Free
- **Endpoint:** https://edge.vinkius.com/vk_preview_lf0q4Ji5gwBUCtWJY46nkvv7D1vmE7HnsfZgOzJP/ai-agent-connect
- **Tags:** password-entropy, security-ops, cryptography, strength-scoring, local-execution, authentication

## Description

Password Strength Evaluator lets you move past 'strong enough' guesses when auditing databases or setting up new accounts. Most AI models just guess based on common patterns, often letting things like `P@ssw0rd123!` slide because it has symbols and numbers. This Connector changes that by giving your agent a real engine to do the math. It looks for common dictionary words, repeated characters, and familiar sequences to give you a score based on actual entropy. Instead of just checking for length or special characters, it evaluates the password against known patterns and common human behaviors. You'll get a clear idea of how long a brute-force attack would take, which makes it way easier to set firm security policies that actually mean something. It's a standard part of the Vinkius catalog, making it easy to plug into your existing security workflow without having to build your own evaluation logic from scratch. By using this, your AI client can provide users with immediate, helpful feedback on why their chosen password is weak and what specific changes they need to make to secure their account. Whether you're scanning a list of leaked credentials or building a custom sign-up flow, this tool ensures that only high-entropy passwords make it into your system.

## Tools

### evaluate_password
Send a raw password to get a 0-4 score, a crack time estimate, and specific feedback on weaknesses. This makes it easy to enforce security policies on user accounts.

## Prompt Examples

**Prompt:** 
```
Is 'CorrectHorseBatteryStaple' a good password?
```

**Response:** 
```
### Password Evaluation

* **Score:** 4/4
* **Estimated Crack Time:** Centuries
* **Feedback:** This is a very strong, high-entropy passphrase. It avoids common patterns and is highly resistant to brute-force attacks.
```

**Prompt:** 
```
Check if 'Admin123!' is safe enough for our new portal.
```

**Response:** 
```
### Password Evaluation

* **Score:** 2/4
* **Estimated Crack Time:** 12 days
* **Feedback:** This is a very weak password. It uses a common word and simple substitution. You should require a more complex passphrase.
```

**Prompt:** 
```
Audit these three passwords: 'P@ssw0rd1', 'BlueSky99', and 'XyZ_789_qP'.
```

**Response:** 
```
| Password | Score | Crack Time | Status |
| :--- | :--- | :--- | :--- |
| P@ssw0rd1 | 1 | < 1 hour | **Critical** |
| BlueSky99 | 2 | 4 days | **Weak** |
| XyZ_789_qP | 4 | Centuries | **Strong** |
```

## Capabilities

### Calculate mathematical entropy
Get a score from 0 to 4 using evaluate_password to measure actual mathematical complexity.

### Estimate crack times
Use evaluate_password to see exactly how many days or years a hacker needs to crack a password.

### Identify specific weaknesses
Receive specific feedback via evaluate_password on why a password is weak, such as common words or patterns.

## Use Cases

### Auditing leaked databases
An engineer finds a list of leaked passwords and asks the agent to use evaluate_password to flag any that can be cracked in under a year.

### User onboarding
A new user tries to set a weak password and the agent uses evaluate_password to tell them it's too common.

### Policy validation
A security lead wants to see if '12 characters' is actually enough for their specific user base using evaluate_password.

### Automated account cleanup
An agent identifies accounts with 'low entropy' scores from evaluate_password and flags them for a mandatory password reset.

## Benefits

- Stop relying on basic regex by using the zxcvbn engine via the evaluate_password tool to catch complex patterns.
- Enforce real security standards with precise crack time estimates from evaluate_password that show exactly how long a password lasts.
- Get actionable feedback on why a password failed using evaluate_password so you can give users better instructions on what to change.
- Automate large-scale security audits of plain-text databases by running evaluate_password on every entry.
- Ensure consistent security across all accounts by using a standardized scoring system from 0 to 4 via evaluate_password.

## How It Works

The bottom line is you get math-based security scores instead of lucky guesses.

1. Give your agent a raw password string to check.
2. The agent runs the string through the evaluation engine.
3. You get a score, a crack time estimate, and a list of specific weaknesses.

## Frequently Asked Questions

**How does Password Strength Evaluator help with security audits?**
It automates the process of checking thousands of credentials for weakness. Your agent can run every password through an entropy test and flag the ones that are most likely to be cracked by hackers.

**Does Password Strength Evaluator use a real math engine?**
Yes, it uses the zxcvbn engine. This means it looks at things like dictionary words and common patterns instead of just checking for symbols or numbers.

**Can I use Password Strength Evaluator to set password policies?**
Absolutely. You can ask your agent to only accept passwords that get a score of 3 or higher. This ensures your users are choosing truly strong credentials.

**How accurate are the crack time estimates?**
The tool provides estimates based on local fast hashing. It tells you how long a standard brute-force attack would take to guess the password.

**Can Password Strength Evaluator help me find leaked passwords?**
You can give your agent a list of plain-text passwords from a leak. It will evaluate each one and tell you which ones are the highest risk so you can prioritize your response.

**Is the evaluation done locally?**
Yes, the calculation happens locally. This means your sensitive password strings don't need to be sent to an external third-party service for scoring.

**Is the password sent to any API?**
No. The evaluation runs 100% local within the secure V8 Edge isolate, ensuring zero data leakage.

**What is the score range?**
It returns a score from 0 (very weak) to 4 (very strong). We recommend rejecting any password with a score below 3.

**Does it detect common patterns?**
Yes, it detects dates, names, sequential keyboard patterns (like 'qwerty'), and common dictionary words.