# Password Entropy Calculator MCP for AI Agents MCP > Password Entropy Calculator measures the mathematical strength of strings and identifies predictable patterns. It calculates entropy bits, detects keyboard walks, and verifies if passwords meet your specific security policy requirements. ## Overview - **Category:** security - **Price:** Free - **Endpoint:** https://edge.vinkius.com/vk_preview_Yi2jDRdqD4gR55HhaXUyCgWKnHJEsUAkVH4naGdL/mcp - **Tags:** password, entropy, security, brute-force, compliance ## Description Checking if a password is actually secure is much harder than just looking for a special character or a number. Most people pick things that are easy to remember but incredibly easy for a computer to guess. This MCP changes how you audit credentials by moving beyond simple length checks. You can take any string and immediately see the actual bits of unpredictability it contains, giving you a real sense of how long a brute-force attack would actually take. It does not just look at math; it looks for human habits like typing in straight lines across a keyboard or using common sequences. If you are managing security standards for a company, you can use it to ensure every new password meets your specific complexity rules without manual checking. By connecting this to your agent through the Vinkius catalog, you turn your AI client into a dedicated security auditor that flags vulnerabilities before they become liabilities. ## Tools ### audit_pattern_risks Scans strings for predictable human patterns like keyboard walks or character repetitions. This helps you find vulnerabilities that math alone might miss. ### evaluate_password_strength Calculates the bits of entropy and the mathematical difficulty of cracking a password. It provides a clear view of the search space for any given string. ### verify_policy_compliance Checks if a specific string meets your required length and character class constraints. This ensures all credentials follow your company's security handbook. ## Prompt Examples **Prompt:** ``` How strong is 'P@ssw0rd123'? ``` **Response:** ``` The password has an entropy of approximately 45.2 bits. This is considered a medium strength level, but it may be vulnerable to dictionary attacks. ``` **Prompt:** ``` Does 'abc12' meet a policy of 8 characters and one digit? ``` **Response:** ``` No, it does not meet the requirements. It fails the minimum length requirement of 8 characters. ``` **Prompt:** ``` Check this string for dangerous patterns: 'qwertyuiop' ``` **Response:** ``` This string contains a **keyboard walk pattern**, making it highly predictable and easy to crack. ``` ## Capabilities ### Measure mathematical unpredictability Get an exact count of entropy bits for any string. ### Detect keyboard patterns Identify sequences like keyboard walks that are easy to guess. ### Enforce character class rules Check if strings contain the required numbers, symbols, or letters. ### Estimate brute-force resistance Calculate how much time it would take to crack a password. ### Identify sequential risks Find character repetitions and predictable sequences in your data. ## Use Cases ### Auditing legacy systems An engineer asks their agent to check a list of old passwords for high-risk patterns using audit_pattern_risks. ### Validating new policies A manager uses the tool to see if a proposed 12-character policy is actually strong enough via evaluate_password_strength. ### Secret generation checks A developer checks if a newly generated API key meets the required complexity with verify_policy_compliance. ### Security training demonstrations An instructor uses it to demonstrate how common strings fail even when they include special characters. ## Benefits - Stop relying on guesswork by using evaluate_password_strength to get exact entropy bits. - Catch sneaky vulnerabilities like keyboard walks using audit_pattern_risks. - Automate your security audits by checking strings against rules with verify_poliy_compliance. - Reduce the risk of brute-force attacks by identifying low-entropy credentials immediately. - Standardize password requirements across your organization without manual oversight. ## How It Works The bottom line is you get instant, mathematically backed security feedback on any credential. 1. Connect the Password Entropy Calculator to your AI client through Vinkius. 2. Provide a string or password to your agent for analysis. 3. Review the detailed breakdown of entropy, patterns, and policy compliance. ## Frequently Asked Questions **How can I use Password Entropy Calculator to check my passwords?** You just ask your AI client to analyze a specific string using the tool. It will return the entropy and any risks found. **Can Password Entropy Calculator detect keyboard walks?** Yes, it specifically looks for patterns like typing in straight lines across the keys. **Does Password Entropy Calculator help with security compliance?** Absolutely. You can use it to verify if strings meet your specific length and character requirements. **Is Password Entropy Calculator useful for developers?** Yes, developers can use it to ensure that generated API keys or secrets are mathematically strong. **Can I automate my security audits with Password Entropy Calculator?** You can integrate it into your agent's workflow to scan lists of credentials automatically. **How is password strength calculated?** Strength is determined using Shannon entropy, which considers the length of the password and the size of the character pool (uppercase, lowercase, digits, and symbols) to calculate bits of unpredictability. **Can I check if a password follows my company's security policy?** Yes. By using the `verify_policy_compliance` tool, you can specify requirements like minimum length and mandatory character classes to see if a password is compliant. **What kind of patterns does the auditor detect?** The `audit_pattern_risks` tool detects keyboard walks (e.g., 'asdf'), sequential characters (e.g., '123'), and repeated character sequences.