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:

| 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

Clone the repository:

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

Install dependencies:
```
npm install
```
Build the project:
```
npm run build
```

Run tests:

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

Start in development mode:
```
npm run dev
```

Troubleshooting

Common Issues

SPARQL Endpoint Connection Issues
- Check your internet connection
- Verify the HM Land Registry endpoint is available
- Ensure your IP is not being rate limited
Invalid Postcode Format
- Ensure postcodes are in the correct UK format
- Remove any extra spaces
- Use uppercase letters
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.