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Ynab MCP Server

@MCP-Mirror

Repository

Basic information

Category

Other

Transports

stdio

Author

MCP-Mirror

About Ynab MCP Server

Mirror of

#ynab#mcp#budgeting#finance

Ynab MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "ynab-mcp-server": {
      "command": "npx",
      "args": [
        "ynab-mcp-server"
      ],
      "env": {
        "YNAP_API_TOKEN": ""
      }
    }
  }
}

Ynab MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

What is ynab-mcp-server?

A Model Context Protocol (MCP) server built with mcp-framework that provides tools for interacting with your YNAB budgets. It is intended for use with AI assistants to manage YNAB data via conversation.

How to use ynab-mcp-server?

Set the environment variable YNAB_API_TOKEN with your YNAB personal access token. Build the project (npm install && npm run build), then add the server to your MCP client configuration (e.g., Claude Desktop) using the command and path to the built index.js, or use npx after publishing.

Key features of ynab-mcp-server

  • Lists all budgets on your YNAB account
  • Summarizes underfunded categories and low accounts
  • Retrieves all unapproved transactions
  • Creates new transactions for a specified budget and account
  • Supports prompt-based interaction for transaction creation

Use cases of ynab-mcp-server

  • Set up a default budget interactively with an AI assistant
  • Add new transactions from conversation (e.g., “Add a transaction … spent at REI”)
  • Review and manage overspent categories
  • Approve pending transactions
  • Check total monthly spending versus total income

Frequently asked questions

1

What runtime does ynab-mcp-server require?

It requires Node.js and npm. Build commands are `npm install` and `npm run build`.

2

How do I authenticate with YNAB?

You must set the environment variable `YNAB_API_TOKEN` with your personal access token from YNAB. This token is never sent directly to the LLM; it is stored privately in the environment.

3

Which MCP clients are supported?

The README provides configuration examples for Claude Desktop and links to other MCP clients at https://modelcontextprotocol.io/clients.

4

Can I add custom tools to ynab-mcp-server?

Yes, you can extend the server by adding new tools using the CLI command `mcp add tool <tool-name>` and referencing the YNAB OpenAPI specification.

5

What is the knowledge file for?

The optional `KNOWLEDGE_DIR` and `KNOWLEDGE_FILE` environment variables allow you to specify where and how server knowledge (e.g., budget selections) is stored. Defaults to `data/server-knowledge.json` in the server directory.

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