qjtrader 0.4.3

Official Python client for QJ Trader — Canadian and selected US market data and order entry.

qjtrader

Hosted assistants should use the delegated OAuth connector from QJ Gateway, which keeps the trading client secret out of chat. This SDK remains the full programmatic client for Python services and local agents.

Official Python client for the QJ Trader AI Trading APIs — stream real-time Canadian and selected US market data and send orders through entitled Canadian or US gateway accounts (Montréal Exchange derivatives, and equities across every lit exchange and dark pool) over one authenticated connection.

pip install qjtrader

• Free sandbox, no approval. Create an account at gateway.qjtrader.ai, click Create sandbox credential, and you get a client_id + client_secret that stream simulated data and return simulated fills — in the exact production wire format, 24/7.
• Sandbox → production with one credential swap. Your code never changes; the credential decides sandbox vs. real, server-side.
• Stdlib only. No dependencies — easy to install, easy to audit.
• Verifiable releases. Published straight from this repo via PyPI Trusted Publishing with signed PEP 740 provenance — no manual uploads, no stored tokens. See SECURITY.md to verify a release.

Quickstart

Get a sandbox key from the console, then:

export QJ_CLIENT_ID="your-client-id"
export QJ_CLIENT_SECRET="your-client-secret"

Send an order

import qjtrader

client = qjtrader.Client()  # reads QJ_CLIENT_ID / QJ_CLIENT_SECRET from the environment

with client.orders() as oe:
    fill = oe.order_and_wait(
        sym="MX:CRAU26", side="buy", qty=1, price=97.00, account="SIM", tif="ioc",
    )
    print(fill)   # {'type': 'exec', 'status': 'filled', 'last_px': 97.0, 'cum_qty': 1, ...}

Lower-level, if you want every message:

with client.orders() as oe:
    cid = oe.order(sym="MX:CRAU26", side="buy", qty=1, price=97.00, account="SIM")
    for msg in oe.updates(timeout=10):
        print(msg)          # accepted -> new -> (partial)* -> filled | canceled | replaced
    oe.cancel(cid)
    print(oe.status())      # open orders + session state

Stream market data

import qjtrader

client = qjtrader.Client()

with client.market_data() as md:
    md.subscribe(["CA:RY", "CA:RY.PT", "MX:CRAU26", "US:@ESU26"], depth=5)
    for msg in md.messages(timeout=30):
        if msg["type"] == "quote":
            print(msg["symbol"], msg["data"]["bid"], msg["data"]["ask"])

• CA:RY is the consolidated Canadian equity book (each level tagged with its venue); CA:RY.PT is PURE (CSE) only. Futures like MX:CRAU26 and selected US contracts such as US:@ESU26 are venue-native. Production access remains product- and entitlement-specific. See the full symbology reference.

Check what is available

Coverage differs by product and entitlement, especially for US depth. The offline matrix requires no credential or network connection:

from qjtrader import market_availability

print(market_availability()["markets"]["US"])

Verified examples include AAPL L1, SPY L1/L2, and selected US futures L1/L2. AAPL depth, NDX, and US listed-option depth are not currently available. See Market Availability.

Command line

The package installs a qjtrader command:

qjtrader subscribe CA:RY MX:CRAU26 US:@ESU26 --watch 30
qjtrader order --sym MX:CRAU26 --side buy --qty 1 --price 97.00 --account SIM --tif ioc
qjtrader status
qjtrader cancel --orig qj-abc123

# strategies: the same file runs in backtest and live
qjtrader backtest examples/strategy_meanreversion.py --symbol MX:CRAU26 --bars 200
qjtrader run       examples/strategy_meanreversion.py --symbols MX:CRAU26 --tag mr1

Strategies — one contract, every venue

Subclass Strategy and the same file runs in the backtest engine, a paper run, or live (plan §10). Backtests are offline and deterministic (no network, no secrets); qjtrader run hosts it against a live/paper credential, tags every order with the strategy name (so the journal groups by strategy), and cancels everything on Ctrl-C.

from qjtrader import Strategy, run_backtest, synthetic_bars

class Buy2Percent(Strategy):
    def on_bar(self, ctx, bar):
        if ctx.position(bar["symbol"]) == 0 and bar["close"] < ctx.param("floor", 0):
            ctx.buy(bar["symbol"], 1, bar["close"], tif="ioc")
    def on_fill(self, ctx, fill):
        ctx.log("filled", fill.get("cid"), "@", fill.get("last_px") or fill.get("price"))

report = run_backtest(Buy2Percent(), synthetic_bars("MX:CRAU26", 200), params={"floor": 95})
print(report["total_pnl"], report["positions"])

The bar-level backtester is for logic; L2 event-replay with queue-model fills (microstructure truth) comes from the paper environment.

Configuration

Client() reads these (constructor args override environment):

Setting	Env var	Default
Client ID	QJ_CLIENT_ID	— (required)
Client secret	QJ_CLIENT_SECRET	— (required)
Token endpoint	QJ_TOKEN_URL	QJ Cognito token URL
Market-data host	QJ_DATA_HOST	data-feed.qjtrader.ai:7000
Order-entry host	QJ_ORDERS_HOST	orders.qjtrader.ai:7001
Pinned CA/cert	QJ_CA_FILE	none (standard public-CA validation)

Tokens are minted for you (OAuth2 client-credentials) and refreshed automatically before they expire — you never handle them directly. Need a raw token (e.g. for the WebSocket interface)? client.token(qjtrader.MARKET_DATA_SCOPE).

Both public API hosts use standard public-certificate validation. QJ_CA_FILE remains available for controlled private deployments but is not required for the hosted QJ Gateway services.

How it works

Both APIs speak NDJSON over TLS — one JSON object per line, UTF-8, newline-terminated, authenticated with an OAuth2 JWT sent on the first line. The order lifecycle is a deterministic, journaled state machine (accepted → new → (partial)* → filled | canceled | replaced), commands are idempotent per client order id (cid), and the server enforces pre-trade risk checks + cancel-on-disconnect. Full protocol: Order Entry and Market Data.

Use it from an LLM (MCP)

Prefer to drive QJ from Claude or another AI assistant? The companion qjtrader-mcp server exposes these APIs as Model Context Protocol tools — subscribe to quotes and place simulated orders in plain language, no code. Order tools refuse a live credential by default (sandbox-only unless you opt in). Add it to Claude Code with:

claude mcp add qjtrader -e QJ_CLIENT_ID=... -e QJ_CLIENT_SECRET=... -e QJ_ENV=sandbox -- uvx qjtrader-mcp

The console's "Connect your AI" panel generates this for you, pre-filled.

Links

• 📚 Docs: https://docs.qjtrader.ai/docs/ai
• 🔑 Console (get a key): https://gateway.qjtrader.ai
• 🔤 Symbology: https://docs.qjtrader.ai/docs/ai/symbology
• 🐛 Issues: https://github.com/QJTrader/qjtrader-python/issues

License

Apache-2.0. See LICENSE.