ZincBind MCP Server is a Model Context Protocol (MCP) server that provides programmatic access to the ZincBindDB GraphQL API for querying zinc binding site structures and protein data. The server runs on Cloudflare Workers, enabling scalable, serverless access for AI assistants and automated workflows to explore zinc binding sites, PDB entries with zinc coordination, multi-metal sites and chain clusters, as well as liganding residues and binding geometries. It exposes one main MCP tool, zincbind_db_graphql_query, to execute GraphQL queries against the ZincBindDB API, including support for schema introspection and common queries such as listing binding sites and retrieving related PDB structures. The repository includes development and deployment scripts (dev, deploy, format, lint:fix, cf-typegen) and a core MCP agent class (ZincBindMCP) with a custom GraphQL client for executing queries. This MCP server is designed for researchers and AI developers who want to integrate ZincBindDB data into training pipelines or conversational assistants, with setup guided for local development and Cloudflare deployment. It is MIT licensed with citation requirements.