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);

Usage Notes

Case Sensitivity

The UK Land Registry data is case-sensitive for street names and city names. However, this MCP automatically converts these parameters to uppercase before sending to the Land Registry API, so you can use any case in your searches.

Example:

"Cherry Drive" and "CHERRY DRIVE" will both work correctly.

Search Parameters

The server accepts the following search parameters:

Parameter	Type	Description	Default
postcode	string	UK postcode to search	-
street	string	Street name	-
city	string	City name	-
minPrice	number	Minimum property price	-
maxPrice	number	Maximum property price	-
propertyType	string	One of: detached, semi-detached, terraced, flat, other	-
fromDate	string	Start date (YYYY-MM-DD)	-
toDate	string	End date (YYYY-MM-DD)	-
limit	number	Maximum number of results	10
offset	number	Number of results to skip	0
sortBy	string	Sort by 'date' or 'price'	'date'
sortOrder	string	Sort order 'asc' or 'desc'	'desc'

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.