USPTO Patent MCP Server is a FastMCP server that enables access to USPTO patent and patent application data through three data sources: the Patent Public Search API (ppubs.uspto.gov), the Open Data Portal API (api.uspto.gov), and Google Patents Public Datasets via BigQuery. It empowers Claude Desktop and other MCP clients to pull data from USPTO APIs or search through 90M+ patent publications from 17+ countries via Google's BigQuery. The server exposes a suite of functions organized by data source, including public patent search, full text documents, and document metadata, with optional PDF downloads (not currently supported by Claude Desktop). Features include centralized environment-based configuration, retry and backoff logic, session caching, robust error handling, and clear separation between sources. The server provides access to patent-related endpoints and functions such as ppubs_search_patents, ppubs_get_full_document, get_app_metadata, and google_search_patents, among others. It emphasizes maintainability and testability with type hints, pytest-based testing, and Python 3.10+ compatibility. Prerequisites include uv dependency management, a USPTO ODP API key for ODP requests, and Google Cloud credentials for BigQuery access. It’s designed to be run locally with Claude Desktop integration, via stdio transport.