Property Price Search MCP Server

A Model Context Protocol (MCP) server that allows users to search for property prices by postcode using the HM Land Registry's SPARQL endpoint.

Features

• Search property prices by postcode or street/city combination
• Filter results by price range, property type, and date range
• Connect to HM Land Registry's public SPARQL endpoint
• Implements MCP stdio transport for IDE integration
• TypeScript implementation with full type safety
• Comprehensive test suite
• CLI interface for direct usage

Prerequisites

• Node.js >= 18
• npm >= 7

Installation

Global Installation

npm install -g property-prices-mcp

Local Installation

npm install property-prices-mcp

Usage

Command Line Interface

property-prices-mcp

As a Library

import { McpClient } from '@modelcontextprotocol/sdk/client';

const client = new McpClient();
const result = await client.resource('property-prices').query({
  postcode: 'SW1A 1AA',
  minPrice: 1000000,
  propertyType: 'flat',
  limit: 5,
});

console.log(result);

Search Parameters

The server accepts the following search parameters:

Response Format

The API returns results in the following format:

interface PropertyPrice {
  price: number;
  date: string;
  propertyType: string;
  newBuild: boolean;
  tenure: string;
  paon: string;
  saon?: string;
  street: string;
  locality?: string;
  town: string;
  district: string;
  county: string;
  postcode: string;
}

interface SearchResponse {
  results: PropertyPrice[];
  total: number;
  offset: number;
  limit: number;
}

Error Handling

The server returns standard HTTP status codes:

• 200: Successful request
• 400: Invalid parameters
• 404: No results found
• 500: Server error

Error responses include a message explaining the error:

{
  "error": "Invalid postcode format"
}

Development

1. Clone the repository:

   git clone https://github.com/joemclo/property-prices-mcp.git
   cd property-prices-mcp
   

2. Install dependencies:

   npm install
   

3. Build the project:

   npm run build
   

4. Run tests:

   npm test                  # Run all tests
   npm run test:unit        # Run unit tests only
   npm run test:integration # Run integration tests only
   

5. Start in development mode:

   npm run dev
   

Troubleshooting

Common Issues

1. SPARQL Endpoint Connection Issues

   • Check your internet connection
   • Verify the HM Land Registry endpoint is available
   • Ensure your IP is not being rate limited

2. Invalid Postcode Format

   • Ensure postcodes are in the correct UK format
   • Remove any extra spaces
   • Use uppercase letters

3. No Results Found

   • Try broadening your search criteria
   • Check if the date range is too narrow
   • Verify the postcode exists

Contributing

Please read CONTRIBUTING.md for details on our code of conduct and the process for submitting pull requests.

Changelog

See CHANGELOG.md for a list of changes and version history.

License

This project is licensed under the MIT License - see the LICENSE file for details.