Vaquill MCP Server

vaquill-mcp

MCP server for Vaquill legal research API. Covers US federal + 50-state law (USC, CFR, state legislation, CourtListener case law) and Indian law (31M+ judgments, 23K+ acts). Ask AI-powered legal questions, search statutes and case law, resolve citations, and traverse citation networks — all from your AI tools.

Quick Start

Prerequisites

Sign up at vaquill.ai to get your API key.

Claude.ai (Web)

No installation needed. Add as a remote MCP server in Claude.ai Settings > Integrations:

Option A — Simple URL (API key in path):

https://mcp.vaquill.ai/s/vq_key_your_key_here

Option B — Bearer token (recommended):

URL:   https://mcp.vaquill.ai/s/_
Token: vq_key_your_key_here

Available on Claude Pro, Max, Team, and Enterprise plans.

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "vaquill": {
      "command": "uvx",
      "args": ["vaquill-mcp"],
      "env": {
        "VAQUILL_API_KEY": "vq_key_your_key_here"
      }
    }
  }
}

Claude Code

Remote (no install):

claude mcp add-json vaquill '{"type":"http","url":"https://mcp.vaquill.ai/s/_","headers":{"Authorization":"Bearer vq_key_your_key_here"}}'

Local (via uvx):

claude mcp add vaquill -- uvx vaquill-mcp
# Then set the env var in your shell: export VAQUILL_API_KEY=vq_key_...

Or add to .claude/settings.json:

{
  "mcpServers": {
    "vaquill": {
      "command": "uvx",
      "args": ["vaquill-mcp"],
      "env": {
        "VAQUILL_API_KEY": "vq_key_your_key_here"
      }
    }
  }
}

Cursor

Add to Cursor Settings > MCP Servers:

{
  "mcpServers": {
    "vaquill": {
      "command": "uvx",
      "args": ["vaquill-mcp"],
      "env": {
        "VAQUILL_API_KEY": "vq_key_your_key_here"
      }
    }
  }
}

VS Code (Copilot)

Add to .vscode/settings.json:

{
  "mcp": {
    "servers": {
      "vaquill": {
        "command": "uvx",
        "args": ["vaquill-mcp"],
        "env": {
          "VAQUILL_API_KEY": "vq_key_your_key_here"
        }
      }
    }
  }
}

Windsurf

Add to ~/.windsurf/settings.json:

{
  "mcpServers": {
    "vaquill": {
      "command": "uvx",
      "args": ["vaquill-mcp"],
      "env": {
        "VAQUILL_API_KEY": "vq_key_your_key_here"
      }
    }
  }
}

Available Tools

Cross-jurisdiction

US law (USC + CFR)

Indian case law

Indian acts & legislation

Environment Variables

Example Usage

Once configured, you can ask your AI assistant things like:

US law:

• "What does 17 CFR 240.10b-5 say about insider trading?"
• "Find USC sections on equal protection under the Fourteenth Amendment"
• "Summarize FRCP Rule 12(b)(6) and recent SDNY case law applying it" (uses deep mode)
• "What are the federal penalties for wire fraud under 18 USC 1343?"

Indian law:

• "Search for Supreme Court cases on Section 302 IPC"
• "What is the legal test for negligence in Indian tort law?"
• "Resolve the citation AIR 1978 SC 597"
• "Look up the case Maneka Gandhi vs Union of India and show treatment stats"
• "Show the citation network around ADM Jabalpur vs Shivkant Shukla"
• "Compare murder and culpable homicide under IPC" (uses deep mode)

Development

# Clone and install
git clone https://github.com/Vaquill-AI/vaquill-mcp.git
cd vaquill-mcp
uv sync --all-extras

# Run locally
VAQUILL_API_KEY=vq_key_... uv run vaquill-mcp

# Run tests
uv run pytest

# Test with FastMCP inspector
uv run fastmcp dev src/vaquill_mcp/server.py

How It Works

This package is a thin MCP wrapper around the Vaquill Developer API. At startup, it fetches the OpenAPI spec from the live API and auto-generates MCP tools using FastMCP. Tool names and descriptions are customized for optimal LLM performance.

Because the spec is fetched at startup (not bundled), tools automatically reflect any API changes without a package update.

Credits & Pricing

API calls consume credits. Check current pricing at vaquill.ai or use the get_pricing tool.

1 credit = $0.10 USD = 10 INR

License

MIT