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VladimirBigunenko

mcp-utility-server

by VladimirBigunenko
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Python
Hybrid

MCP Utility Server

A production-grade Model Context Protocol server with 10 utility tools for daily operations. Built with FastMCP, stdlib-first, fully tested (TDD).

Why this server: it demonstrates real MCP engineering — not a hello-world. It includes:

  • Retry/backoff with jitter on all external HTTP calls (429/5xx handling)

  • State persistence for page monitoring (SHA-256 diff tracking)

  • Observability — per-tool retry counters exposed as an MCP tool

  • Sandboxing for file operations (optional FILE_SANDBOX)

  • Deterministic outputs (word-of-day selection is hash-based, same all day)

  • ~30 pytest tests with mocked network (no external deps in CI)

Tools

Tool

Description

file_convert

Convert MD/HTML/CSV/JSON/Text formats (stdlib-only)

page_monitor

Poll a URL, SHA-256 diff, optional Telegram notify on change

telegram_poll

Send Telegram polls (2-10 options)

trade_signal

Binance OHLCV → RSI(14) + SMA20/SMA50 cross → BUY/SELL/HOLD

backtest_report

Parse Freqtrade backtest JSON → markdown digest

word_of_day

German word (A1/A2) with translations, IPA, examples — deterministic per date

soc_lang_card

Daily language card: German word + SOC term (EN/DE/RU)

weather_alert

Open-Meteo threshold alerts (wind/rain) for configured cities

antimatter_scan

Scan trading logs for trades/errors/signals + resonance score

mcp_stats

Retry/backoff observability snapshot

Related MCP server: Local Utilities MCP Server

Quick start

# Install
uv sync

# Run (stdio transport — default for MCP clients)
uv run server.py

# Run (SSE transport — for remote clients)
uv run server.py --transport sse

# Test
uv run pytest

Configuration (env vars)

Env

Default

Purpose

TELEGRAM_BOT_TOKEN

—

Required for telegram_poll / page_monitor notify

TELEGRAM_CHAT_ID

—

Default chat for Telegram tools

FILE_SANDBOX

unset (allow-all)

Restrict file_convert to a directory. Set on production!

STATE_DIR

~/.mcp-utility/state

Page-monitor state location

HTTP_MAX_RETRIES

2

Max retries on 429/5xx (1 initial + N retries)

HTTP_RETRY_DELAY

1.0

Base backoff seconds (exponential, ±20% jitter)

MCP_STATS_PATH

/tmp/mcp_utility_stats.json

Retry stats persistence

MCP_LOG

INFO

Logging level

MCP_TRANSPORT

stdio

stdio or sse

Example: Claude Desktop

{
  "mcpServers": {
    "mcp-utility": {
      "command": "uv",
      "args": ["run", "--directory", "/path/to/mcp-utility-server", "server.py"]
    }
  }
}

Example: trade signal

echo '{"symbol":"BTCUSDT","interval":"1d"}' | uv run server.py
# → {"status":"ok","symbol":"BTCUSDT","rsi":42.3,"ma_fast":42100.0,
#    "ma_slow":41800.5,"signal":"BUY","reasons":["MA20 > MA50"],...}

Security notes

  • file_convert accepts any path when FILE_SANDBOX is unset — always set it in production

  • Telegram token is read from env only, never logged

  • antimatter_scan("docker:...") executes docker logs — requires docker socket access

License

MIT

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Tools

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