Pact Tooling MCP Server

Name: Pact Tooling MCP Server
Author: io.github.Pact-Community-Organization

io.github.Pact-Community-Organization/pact

Repository Registry

What is the Pact Tooling MCP server?

Pact 5 tooling: REPL test runs, trap scanning, gas estimation, interface diff, format checks.

How to install Pact Tooling

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

PACT_COMMUNITY_WORKSPACE_ROOT
required
Workspace root directory; all file access is confined inside it.
PACT_COMMUNITY_PACT_BIN
Path to the pact binary (default: pact on PATH).

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "pact": {
      "command": "npx",
      "args": [
        "-y",
        "@pact-community/mcp-pact"
      ],
      "env": {
        "PACT_COMMUNITY_WORKSPACE_ROOT": "<YOUR_PACT_COMMUNITY_WORKSPACE_ROOT>",
        "PACT_COMMUNITY_PACT_BIN": "<YOUR_PACT_COMMUNITY_PACT_BIN>"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json

{
  "mcpServers": {
    "pact": {
      "command": "npx",
      "args": [
        "-y",
        "@pact-community/mcp-pact"
      ],
      "env": {
        "PACT_COMMUNITY_WORKSPACE_ROOT": "<YOUR_PACT_COMMUNITY_WORKSPACE_ROOT>",
        "PACT_COMMUNITY_PACT_BIN": "<YOUR_PACT_COMMUNITY_PACT_BIN>"
      }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "pact": {
      "command": "npx",
      "args": [
        "-y",
        "@pact-community/mcp-pact"
      ],
      "env": {
        "PACT_COMMUNITY_WORKSPACE_ROOT": "<YOUR_PACT_COMMUNITY_WORKSPACE_ROOT>",
        "PACT_COMMUNITY_PACT_BIN": "<YOUR_PACT_COMMUNITY_PACT_BIN>"
      }
    }
  }
}

VS Code

.vscode/mcp.json

{
  "servers": {
    "pact": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@pact-community/mcp-pact"
      ],
      "env": {
        "PACT_COMMUNITY_WORKSPACE_ROOT": "<YOUR_PACT_COMMUNITY_WORKSPACE_ROOT>",
        "PACT_COMMUNITY_PACT_BIN": "<YOUR_PACT_COMMUNITY_PACT_BIN>"
      }
    }
  }
}

Claude Code

claude mcp add pact --env PACT_COMMUNITY_WORKSPACE_ROOT=<YOUR_PACT_COMMUNITY_WORKSPACE_ROOT> --env PACT_COMMUNITY_PACT_BIN=<YOUR_PACT_COMMUNITY_PACT_BIN> -- npx -y @pact-community/mcp-pact

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