Is the Password Strength Analyzer API MCP server free to use?

Yes. Password Strength Analyzer API is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Is the Password Strength Analyzer API MCP server free to use?

Yes. Password Strength Analyzer API is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Password Strength Analyzer API

Password strength scoring with entropy, crack time estimation, common password detection. x402.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

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claude_desktop_config.json

{
  "mcpServers": {
    "password-strength-analyzer-api": {
      "command": "npx",
      "args": [
        "-y",
        "password-strength-analyzer-api"
      ]
    }
  }
}

💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

Documentation Overview

Password Strength Analyzer API

Password strength analyzer with entropy calculation and crack time estimation. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

config.json

{
  "mcpServers": {
    "password-strength": {
      "url": "https://password-strength.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

Terminal

curl -X POST "https://password-strength.api.klymax402.com/api/check" \
  -H "Content-Type: application/json" \
  -d '{"password":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
`security_check_password`	POST	`/api/check`	$0.003	Check password strength with entropy and crack time

`security_check_password`

Use this when you need to evaluate password strength or security. Returns a score 0-100, strength rating (weak/fair/strong/excellent), estimated crack time, entropy bits, and improvement suggestions. Checks against top 1000 common passwords. Do NOT use for hash generation — use crypto_generate_hash. Do NOT use for input validation — use data_validate_json.

Parameters

Name	Type	Required	Description
`password`	string	yes	The password to analyze

Example agent prompts

"Evaluate password strength or security"

Payment

Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
Network: Base L2 (eip155:8453)
Asset: USDC
Facilitator: Coinbase CDP (primary), PayAI (fallback)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

Catalog: https://klymax402.com/llms.txt
Full API reference: https://klymax402.com/llms-full.txt
Live stats: https://klymax402.com/stats

License

MIT

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Frequently Asked Questions about Password Strength Analyzer API

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "password-strength-analyzer-api": { "command": "npx", "args": ["-y", "Password Strength Analyzer API"] } }

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Technical Specs & Signals

CategoryFinance & Fintech

27Quality signal: Emerging · 27/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

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Documentation & tools11/30

Adoption & activity1/15

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More in 💰 Finance & Fintech →Best MCP servers for Finance & Fintech →Alternatives to Password Strength Analyzer API →Install in Claude Desktop Install in Cursor Install in VS Code

Documentation Overview

Password Strength Analyzer API

Password strength analyzer with entropy calculation and crack time estimation. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

config.json

{
  "mcpServers": {
    "password-strength": {
      "url": "https://password-strength.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

Terminal

curl -X POST "https://password-strength.api.klymax402.com/api/check" \
  -H "Content-Type: application/json" \
  -d '{"password":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
`security_check_password`	POST	`/api/check`	$0.003	Check password strength with entropy and crack time

`security_check_password`

Parameters

Name	Type	Required	Description
`password`	string	yes	The password to analyze

Example agent prompts

"Evaluate password strength or security"

Payment

Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
Network: Base L2 (eip155:8453)
Asset: USDC
Facilitator: Coinbase CDP (primary), PayAI (fallback)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

Catalog: https://klymax402.com/llms.txt
Full API reference: https://klymax402.com/llms-full.txt
Live stats: https://klymax402.com/stats

License

MIT

Frequently Asked Questions about Password Strength Analyzer API

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "password-strength-analyzer-api": { "command": "npx", "args": ["-y", "Password Strength Analyzer API"] } }