HubSpot MCP Server is a Model Context Protocol (MCP) server that enables AI assistants to interact directly with HubSpot CRM data. It bridges AI models with HubSpot accounts, providing access to contacts, companies, and engagement data, while incorporating built-in vector storage and caching to improve responsiveness and circumvent API limitations. The server emphasizes AI-friendly interactions and stable operation, delivering robust error handling and predictable API behavior even in complex CRM workflows. Core capabilities include semantic search across past conversations using FAISS vector storage, thread-level indexing that stores each conversation separately for precise retrieval, and embedding caching with SentenceTransformer to accelerate repeated queries. Data persists between sessions via a configurable storage directory, enabling continuity across restarts. The solution is designed for cross-platform deployment with optimized Docker images for multiple architectures and straightforward zero-configuration setup. Prerequisites include a HubSpot access token with scopes for contacts, companies, and email sales. Quick-start options include Docker or Smithery CLI installation for easy integration with Claude or other AI assistants.