• SUCCESS
  • FAILURE
  • ERROR
  • HUMAN

How to verify user login credentials with your AI

Connect the Bcrypt Hash Engine to your AI client. Once it's live, your agent can run secure password checks on demand.

Ask AI about this page

Short answer

How do I verify user login credentials with my AI?

Your agent uses the bcrypt_verify tool to compare a plain-text password against a stored hash. This confirms if the credentials match without exposing the original password. You get a clear true or false result to decide if the user gets in.

The outcomes

Where the verification results land.

The AI processes the hash and delivers one of these four outcomes.

SUCCESS

Valid login

The tool confirms the password matches the hash. Your AI can then proceed to grant access to the user.

FAILURE

Invalid login

The tool finds a mismatch. Your AI identifies the failed attempt so you can deny entry.

ERROR

Malformed data

If the hash is broken or invalid, the AI reports the error. You'll know if the input data is the problem.

HUMAN

Manual review

If the AI sees repeated failures, it flags the event. You decide if you need to step in and lock the account.

The workflow

What your AI does when a login attempt arrives.

The AI handles the heavy math of the cryptographic check.

  1. Receive input

    Your agent takes the plain-text password and the stored bcrypt hash from your request.

    bcrypt_verify

  2. Run comparison

    The AI executes the cryptographic check to see if the password produces the same hash.

    bcrypt_verify

  3. Evaluate match

    The agent checks the boolean result to see if the credentials are a match.

    bcrypt_verify

  4. Return status

    The AI tells you whether the login was successful or if it failed.

    bcrypt_verify

Try it

Copy these to start.

Paste these directly into your chat to run a check.

Starting points

Replace the bracketed text with your actual password and hash strings.

bcryptjs Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_VgRCSgyjUOAZXasfzN85yyaKf89xFObklBU0TrT8/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — bcryptjs capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "bcrypt-hash-engine-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_VgRCSgyjUOAZXasfzN85yyaKf89xFObklBU0TrT8/mcp"
    }
  }
}
Copy into chat04

  • Verify if the password 'admin_pass_99' matches this hash: $2b$12$XyZ...[your_hash]

  • Check the login credentials for the user in my auth database using the Bcrypt Hash Engine.

  • Compare this incoming password attempt against the hash found in my user_logs file.

  • Run a bcrypt verification for the session ID I just pulled from the API.

  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Start here

Connect Bcrypt Hash Engine once, then ask.

One connection gives your AI access to these tools. Your login data stays encrypted on our side.

Connect Bcrypt Hash Engine to your AI

FAQ

How this task behaves

  • 01

    Can the AI decrypt my passwords?

    No. Bcrypt is a one-way hash. The AI can only check if a password matches a hash, it cannot reverse the hash to see the password.

  • 02

    Does the AI store my user passwords?

    No. The AI only processes the data you provide during the specific verification request.

  • 03

    Can the AI create new bcrypt hashes?

    No. This MCP only provides the tool to verify existing hashes.

  • 04

    What happens if the hash is malformed?

    The tool will return an error, and the AI will tell you that the hash format is invalid.

  • 05

    Can the AI lock user accounts?

    No. The AI only reports if a password is correct or incorrect. You have to handle account lockouts in your own code.

  • More questions about Bcrypt Hash Engine? The Connector page answers them. See everything the Bcrypt Hash Engine Connector can do

Connect bcryptjs to Claude, Cursor, ChatGPT & more