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MCP verified MIT Self-run

Mcp Ynab

mcp-alexfu-mcp-ynab · by alexfu

FastMCP server for YNAB that auto-generates MCP tools from YNAB’s OpenAPI spec, with support for HTTP and stdio transports.

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Install

$ agentstack add mcp-alexfu-mcp-ynab

✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

Verified badge

Passed review? Show it. Paste this badge into your README — it links to the public security report.

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[![AgentStack Verified](https://agentstack.voostack.com/badges/verified.svg)](https://agentstack.voostack.com/security/report/mcp-alexfu-mcp-ynab)

Reliability & compatibility

✓ Security review passed
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Declared compatibility

Claude CodeClaude DesktopCursorWindsurf

Compatibility is declared by the source manifest. End-to-end runtime verification is coming — see below.

Preview Execution monitoring

We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps — measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.

How agent discovery & health will work →
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About

mcp-ynab

FastMCP server that exposes the YNAB API via MCP using YNAB's published OpenAPI spec.

Requirements

  • Python 3.12+
  • A YNAB personal access token
  • uv (recommended) or pip

Configuration

Environment variables:

  • YNAB_TOKEN (required): your YNAB API token
  • TRANSPORT (optional): http (default) or stdio

Run Locally

Using uv:

uv sync
export YNAB_TOKEN="your_token_here"
export TRANSPORT="http"   # optional, defaults to http
uv run python main.py

HTTP mode starts the server on 0.0.0.0:8080.

Docker

Use the prebuilt image from GHCR:

docker pull ghcr.io/alexfu/mcp-ynab:latest

Run prebuilt image in HTTP mode:

docker run --rm -p 8080:8080 \
  -e YNAB_TOKEN="your_token_here" \
  -e TRANSPORT="http" \
  ghcr.io/alexfu/mcp-ynab:latest

Run prebuilt image in stdio mode:

docker run --rm \
  -e YNAB_TOKEN="your_token_here" \
  -e TRANSPORT="stdio" \
  ghcr.io/alexfu/mcp-ynab:latest

Notes

  • The server fetches YNAB's OpenAPI spec at startup from https://api.ynab.com/papi/open_api_spec.yaml.
  • Startup will fail if YNAB_TOKEN is missing, TRANSPORT is invalid, or the spec request fails.

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

Reviews

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Versions

  • v0.1.0 Imported from the upstream source.

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