Pact Tooling MCP Server

by pact-community-organizationio.github.Pact-Community-Organization/pactv0.2.2

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

0Node.jsstdioofficial registry

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security

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freshness

Active6d ago

Install Pact Tooling MCP server

claude mcp add pact -e PACT_COMMUNITY_WORKSPACE_ROOT='<pact-community-workspace-root>' -- npx -y @pact-community/mcp-pact

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

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

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

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

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

Add to .vscode/mcp.json in your workspace.

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

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
PACT_COMMUNITY_WORKSPACE_ROOT	yes	—	Workspace root directory; all file access is confined inside it.
PACT_COMMUNITY_PACT_BIN	—	—	Path to the pact binary (default: pact on PATH).

Freshness

Active — last maintenance signal 6d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-03 · 6d ago · GitHub
Latest release
2026-07-28 · 2mo ago · GitHub · v0.3.0
Package published
no data · npm/PyPI
Registry entry updated
2026-07-03 · 3mo ago · official registry · v0.2.2

FAQ

›How do I install the Pact Tooling MCP server in Claude Code?

Run: claude mcp add pact -e PACT_COMMUNITY_WORKSPACE_ROOT='<pact-community-workspace-root>' -- npx -y @pact-community/mcp-pact. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Pact Tooling require an API key?

Yes. It expects PACT_COMMUNITY_WORKSPACE_ROOT.

›Can I use Pact Tooling as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Pact Tooling in the official MCP registry?

Yes, as io.github.Pact-Community-Organization/pact.