PictMCP

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PictMCP is an MCP server for software developers who design test cases with AI assistants, providing reliable, algorithm-correct pairwise test generation.

• AI is great at test design, but not at combinatorial math.
• Pairwise generation must be deterministic and correct.
• PictMCP separates thinking (AI) from calculation (PICT).

Prefer a GUI? Check out [PictRider](https://pictrider.takeyaqa.dev/).

• 🔒 Local Processing - All processing runs locally with no external network calls
• ⚡ WebAssembly Powered - Fast execution using Microsoft's PICT algorithm compiled to WebAssembly
• 🔗 Constraint Support - Define constraints to filter out invalid parameter combinations
• 📊 Structured Output - Returns well-structured JSON results for easy integration

• Node.js (v22 or higher)

Add the following configuration to your MCP client. This is an example configuration; the exact format may vary depending on your client. Please refer to your MCP client's documentation for details.

{
  "mcpServers": {
    "PictMCP": {
      "command": "npx",
      "args": ["-y", "pictmcp"]
    }
  }
}

Once installed, you can ask your AI assistant to generate test cases using pairwise combinatorial testing.

> Generate test cases for a login form with the following parameters: > > - Browser: Chrome, Firefox, Safari > - OS: Windows, macOS, Linux > - Language: English, Japanese, Spanish

The AI assistant will use the generate-test-cases tool to create an optimized set of test cases that covers all pairwise combinations.

AI assistants typically format the results as a table:

> | # | Browser | OS | Language | > | --- | -------