YNAB MCP Server provides a local bridge between your YNAB data and MCP-compatible AI assistants. It enables secure, on-device access to YNAB information through a curated set of MCP tools, including user and budget discovery, budget details, category and transaction queries, account and payee listings, and several analytics endpoints. Specifically, you can GetUserInfo, ListBudgets, GetBudgetDetails, GetBudgetMonths, ListCategories, GetCategoryDetails, SearchTransactions, and GetCurrentMonthSnapshot. All data tokens remain local; the YNAB API token is not exposed to third parties. Prerequisites are a YNAB account with API access and an MCP-compatible client (e.g., Claude Desktop). The server can be run via Docker or locally with the .NET 9 SDK. Environment variable YNAB_API_TOKEN is used for authentication. The repository includes a typical project layout with configuration, generated API clients, services, and MCP tools, and guidance for extending by adding new MCP tools decorated with MCP attributes. The project is licensed under MIT and uses semantic-release for versioning, with a focus on secure, private access to budget data for AI-driven analysis and insights.