mcp-mt5
Model Context Protocol server for the MetaTrader 4/5 build pipeline. Compile MQL sources, deploy compiled EAs, run Strategy Tester, parse reports, tail logs โ all driven by an LLM agent without touching the MetaTrader UI.
What this is โ and what it isn't
Use case: an LLM agent edits
.mq5source โ compiles โ deploys โ runs Strategy Tester โ reads report โ adjusts โ repeats. No broker login, no human in the loop, no risk of real-money execution.
For runtime trading, pair this with a live-trading MCP โ they target different layers and compose well.
Tools
27 tools (plus 16 deprecated aliases until 0.6.0) and 2 resource templates. Every tool carries MCP annotations (read-only / destructive hints), a typed output schema and per-parameter descriptions; failures are reported as tool errors, never as a normal result with an error key.
๐ Discovery & terminal selection
๐จ Build & deploy
๐ Source analysis & lint
โ๏ธ Format & refactor
๐ Strategy Tester
๐ Logs & snapshots
๐ก MCP resources
Deprecated aliases (removed in 0.6.0)
The pre-0.5.0 tool names still work in 0.5.x as thin wrappers whose descriptions start with DEPRECATED. Set MCP_MT5_LEGACY_TOOLS=0 to hide them and shrink the tool catalogue to the 27 tools above.
Quick start
Install
pip install mcp-mt5
Requires Windows + an installed MetaTrader 4 or 5 terminal.
Register with an MCP client
Most MCP clients accept a JSON entry under mcpServers. The server inherits its configuration from environment variables:
{
"mcpServers": {
"mt5": {
"command": "mcp-mt5",
"env": {
"MT5_INSTALL": "C:\\Program Files\\MetaTrader 5"
}
}
}
}
Refer to your client's documentation for the exact config file location.
Verify the install
Once registered, ask your agent to call env_info:
{
"edition": "mt5",
"install": "C:\\Program Files\\MetaTrader 5",
"terminal_hash": "<32-char-hex-hash>",
"metaeditor": "C:\\Program Files\\MetaTrader 5\\MetaEditor64.exe",
"experts_dir": "C:\\Users\\<you>\\AppData\\Roaming\\MetaQuotes\\Terminal\\<hash>\\MQL5\\Experts",
"issues": []
}
An empty issues array means everything is wired up correctly.
Configuration
Resolution priority for the MetaTrader install + data folder:
- Explicit env vars (below)
- Auto-scan of
%APPDATA%\MetaQuotes\Terminal\*\origin.txtfor a folder whose origin matchesMT5_INSTALL - Portable mode fallback (data colocated with install dir)
Running the server from WSL
The server can run inside WSL and drive the Windows MetaTrader install through WSL interop.
The install (/mnt/c/Program Files/MetaTrader 5) and the data folder (scanned under
/mnt/*/Users/*/AppData/Roaming/MetaQuotes/Terminal, matched through origin.txt) are
auto-detected; MT5_INSTALL / MT5_DATA override them. Paths handed to MetaEditor/terminal are
translated with wslpath -w automatically. Interop must be enabled
(/etc/wsl.conf [interop] enabled=true, then wsl --shutdown).
MT4 support
Set MT5_EDITION=mt4 and point MT5_INSTALL at your MT4 install. The server switches to metaeditor.exe (32-bit), terminal.exe, and the MQL4/ data tree automatically.
Example workflow
A typical LLM-driven iteration loop:
1. env_info โ verify paths
2. compile_and_deploy source="C:\\...\\MyEA.mq5" โ 0 errors, .ex5 deployed โ
3. patch_tester_ini config="tester.ini" updates={
"Tester.Symbol": "EURUSD",
"Tester.FromDate": "2025.01.01",
"TesterInputs.RiskPct": "1.5"
}
4. run_backtest config="tester.ini" wait=true
5. read_tester_report path=<report_path from step 4> โ summary.net_profit = 1234.56
summary.profit_factor = 1.45
6. tail_log mode="tester" lines=200 structured=true โ diagnose journal warnings
7. <edit Signal.mqh based on findings>
8. โ loop back to step 2
A sample tester.ini
; Launch: terminal64.exe /config:tester.ini
; Period codes: M1=1, M5=5, M15=15, H1=16385, H4=16388, D1=16408
; Model: 0=Every tick, 1=1 min OHLC, 4=Real ticks
[Tester]
Expert=MyEA
Symbol=EURUSD
Period=M15
Model=1
FromDate=2024.01.01
ToDate=2024.12.31
Deposit=10000
Currency=USD
Leverage=500
Visual=0
ShutdownTerminal=1 ; required so run_backtest can wait for the run to finish
Report=tester_report
[TesterInputs]
; ParamName=value||start||step||stop||(N=fixed|Y=optimize)
; RiskPct=1.0||0.1||0.1||3.0||N
A more complete sample lives at examples/tester.ini.
Development
git clone https://github.com/PHUICMT/mcp-mt5
cd mcp-mt5
pip install -e ".[dev]"
pytest # runs the test suite (no MetaTrader needed)
ruff check src tests # lints
CI runs on Windows for Python 3.10, 3.11, and 3.12 against every push to main. Tagging a release (e.g. v0.2.0) triggers an OIDC publish to PyPI.
Project layout
mcp-mt5/
โโโ src/mcp_mt5/
โ โโโ server.py # FastMCP tool definitions
โ โโโ paths.py # Layout detection + origin.txt scan
โ โโโ parsers.py # Compile log, tester report/journal parsers, encoding helpers
โ โโโ analysis.py, lint.py, formatting.py, refactor.py, ast_refactor.py
โ โโโ optimization.py # .opt cache reader (documented TesterOptCache layout)
โ โโโ reports.py, snapshot.py, smoke.py, workdir.py
โโโ tests/ # pytest suite, no live MT5 required
โโโ examples/ # Sample tester.ini + client config
โโโ .github/workflows/ # CI + PyPI release
Limitations
- Windows-only. MetaTrader CLI binaries don't ship for Linux/macOS. Wine ports may work but are untested.
- No live broker access. This server intentionally never authenticates to a broker. Use a separate MCP server for runtime trading.
- Tester report parsing is best-effort. MetaTrader's HTML output isn't a stable schema; the raw HTML is also returned alongside the parsed structure so you can fall back to text inspection when needed.
- Optimisation caches (
Tester/cache/*.opt) are parsed with the layout MetaQuotes published in MQL5 Programming for Traders. Files with an unrecognised record layout are reported as such rather than guessed.
Roadmap
All v0.3.x roadmap items shipped in v0.4.0. Future ideas:
- Real tree-sitter MQL grammar for
extract_function(current implementation is brace-counting + regex) - WebSocket transport for long-lived sessions (currently stdio only)
- Linux/Wine port for non-Windows agents
License
MIT ยฉ 2026 PHUICMT