A local MCP server for YNAB, a budgeting application. It is read-only by default, supports reversible changes, and requires a YNAB API key and plan ID.

Use it to connect an agent to a YNAB budget for reading data and, where supported, making changes that can be reversed.

It lets an agent work with budget information while reducing the risk of accidental permanent changes.

ynab — MCP server by hs737/mcp-server-for-ynab

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/hs737/mcp-server-for-ynab

Made for: Claude Code.

Or install mcp-server-for-ynab, the plugin that ships this one along with the rest of its 12 skills, 2 MCP servers.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/mcp/hs737/mcp-server-for-ynab/ynab/github.svg)](https://agentmods.dev/mcp/hs737/mcp-server-for-ynab/ynab)

Your own site

<a href="https://agentmods.dev/mcp/hs737/mcp-server-for-ynab/ynab"><img src="https://agentmods.dev/badge/mcp/hs737/mcp-server-for-ynab/ynab/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/mcp/hs737/mcp-server-for-ynab/ynab"><img src="https://agentmods.dev/badge/mcp/hs737/mcp-server-for-ynab/ynab.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

ynab scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.mcp.json · 13 lines

What it actually says

{
  "ynab": {
    "command": "uvx",
    "args": [
      "mcp-server-for-ynab==0.4.0",
      "stdio"
    ],
    "env": {
      "YNAB_API_KEY": "${YNAB_API_KEY}",
      "YNAB_PLAN_ID": "${YNAB_PLAN_ID}"
    }
  }
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago Changed 3a98536a5f0b
1mo ago First seen · 13 lines scan A e6146fa3dbe5

Subscribe to this mod's changes

ynab is an MCP server published in the GitHub repository hs737/mcp-server-for-ynab (2 stars, last pushed 2d ago), licensed Apache-2.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Finance and fintech ai-agents budgeting llm-tools mcp model-context-protocol personal-finance

ynab

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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