mt5api

MetaTrader 5 REST API

mt5api exposes MT5 market data, account info, trading history, trading state, order validation, and operational terminal endpoints over HTTP. It is a FastAPI/HTTP adapter over pdmt5, which provides the core MT5 client, dataframe/order primitives, and canonical MT5 constant parsing. mt5api adds optional API-key auth and JSON/Parquet response formatting.

The exposed operational surface is deliberately narrow: mt5api validates trade requests, manages terminal-side subscriptions and MarketWatch visibility, and supports reconnecting the terminal to a different MT5 account via POST /connection/login, but it does not expose live order-send endpoints or implement strategy orchestration.

The API server must run on Windows. pdmt5 connects through the MetaTrader 5 Python API, which is supported only on Windows, so you must host mt5api on a Windows machine with a logged-in MetaTrader 5 terminal. HTTP clients can connect from any operating system.

Architecture

graph TB
    Client["HTTP Client<br/>(Any OS)"]

    subgraph "Windows Host"
        subgraph "FastAPI Application"
            Middleware["Middleware Stack<br/>Logging · Error Handler"]
            Routers["Routers<br/>health · symbols · market · account · history · calc · trading"]
            Auth["API Key Security Dependency<br/>Security(api_key_header) · verify_api_key"]
            Deps["FastAPI Dependencies<br/>MT5 Client Singleton · Format Negotiation"]
            Formatters["Response Formatters<br/>JSON · Parquet"]
            Middleware --> Routers --> Deps --> Formatters
            Auth -.-> Routers
            Formatters --> Middleware
        end

        Deps --> pdmt5["pdmt5<br/>MT5 Client · Constants · Dataframes"]
        pdmt5 --> MT5["MetaTrader 5<br/>Terminal"]
    end

    Client -- "HTTP/REST" --> Middleware
    Middleware -- "JSON / Parquet" --> Client

Features

• REST endpoints for symbols, market data, account info, orders, positions, history, margin/profit calculations, order validation, and terminal operations
• JSON and Apache Parquet responses (content negotiation)
• Optional API key authentication
• Structured JSON logging
• OpenAPI/Swagger docs built into the API

Requirements

• Windows host with MetaTrader 5 terminal installed and logged in
• Linux and macOS are not supported for the API server runtime, but they work for HTTP clients

Installation

Install and run the API on the Windows machine where MetaTrader 5 is installed.

Install the latest release from PyPI:

pip install mt5api

Or, when managing the project with uv, add it as a dependency:

uv add mt5api

Alternatively, install from source:

git clone https://github.com/dceoy/mt5api.git
cd mt5api
uv sync

Running the API on Windows

After installing from PyPI:

$env:MT5API_SECRET_KEY = "your-secret-api-key"  # Optional: omit to disable auth
$env:MT5API_ROUTER_PREFIX = "/api/v1"     # Optional: omit for root-level routes
python -m mt5api

python -m mt5api reads MT5API_HOST, MT5API_PORT, and MT5API_LOG_LEVEL from the environment. You can also invoke uvicorn directly:

uvicorn mt5api.main:app --host 0.0.0.0 --port 8000

If you cloned the source tree, prepend uv run to either command (for example, uv run uvicorn mt5api.main:app --host 0.0.0.0 --port 8000).

Docs:

• Swagger UI: http://localhost:8000/docs
• OpenAPI JSON: http://localhost:8000/openapi.json

Set MT5API_ROUTER_PREFIX to mount the API endpoints under a shared path such as /api/v1. The default is "", which keeps routes like /health and /symbols at the root. "/api/v1", "api/v1", and "/api/v1/" are treated the same.

Set MT5API_MAX_MARKET_BOOK_SUBSCRIPTIONS to cap active market-book subscriptions. The default limit is 100.

Example Requests with curl

Replace windows-host with the DNS name or IP address of the Windows machine running mt5api. If you run the request on that Windows host, localhost also works. In PowerShell, use curl.exe if curl resolves to Invoke-WebRequest.

curl "http://windows-host:8000/health"

# Include X-API-Key only when MT5API_SECRET_KEY is configured on the server.
curl -H "X-API-Key: your-secret-api-key" "http://windows-host:8000/symbols?group=*USD*"

curl -H "X-API-Key: your-secret-api-key" -H "Accept: application/parquet" "http://windows-host:8000/rates/from?symbol=EURUSD&timeframe=TIMEFRAME_M1&date_from=2024-01-01T00:00:00Z&count=100"

Market-data and calculation endpoints accept MetaTrader 5 constants by official name (TIMEFRAME_M1, COPY_TICKS_ALL, ORDER_TYPE_BUY), short alias (M1, ALL, BUY), or integer value.

Endpoints

If MT5API_ROUTER_PREFIX is set, prepend that value to every API route below.

Read-Only Endpoints

• Health: GET /health, GET /version, GET /last-error
• Symbols: GET /symbols, GET /symbols/total, GET /symbols/{symbol}, GET /symbols/{symbol}/tick
• Market data: GET /rates/from, GET /rates/from-pos, GET /rates/range, GET /ticks/from, GET /ticks/range, GET /market-book/{symbol}
• Calculations: GET /calc/margin, GET /calc/profit
• Account: GET /account, GET /terminal
• Trading state: GET /positions, GET /positions/total, GET /orders, GET /orders/total
• History: GET /history/orders, GET /history/orders/total, GET /history/deals, GET /history/deals/total

Operational Endpoints

• POST /symbols/{symbol}/select — Show or hide symbol in MarketWatch
• POST /market-book/{symbol}/subscribe — Subscribe to DOM events
• POST /market-book/{symbol}/unsubscribe — Unsubscribe from DOM events
• POST /order/check — Validate a trade request without execution

License

MIT License - see LICENSE.