Build on the HaasOnline trading engine
/v1 contract that won’t shift under you.
curl https://rest.haasapi.com/v1/bots \
-H "Authorization: Bearer hk_live_..."What you can build
The API exposes the trading surface of TradeServer Cloud — the same actions you take in the app, scriptable end to end.
Bots
List, create, start, stop and delete bots; read a bot’s runtime, open orders, positions and logs.
Orders
Place and cancel orders on your connected exchange accounts, and read balances, orders and positions.
HaasScripts
List, read, create and edit your scripts — automate strategy management, not just execution.
Market data
Pull the exchanges and markets your account can trade, to drive your own logic.
Backtests & Labs
Kick off backtests and Labs optimizations and read every result programmatically.
Accounts
Read balances, open orders and positions across every exchange account you’ve connected.
Three steps to your first call
- Create a key — open Settings → API Keys, name it, and optionally restrict it to specific scopes and IP addresses. The full token is shown once — copy it then.
- Authenticate — send the key as
Authorization: Bearer hk_live_…on every request. - Call the API — base URL
https://rest.haasapi.com/v1. Every endpoint, request and response is in the reference.
curl -X POST \
https://rest.haasapi.com/v1/bots/{bot_id}/start \
-H "Authorization: Bearer hk_live_..."Built for production
Boring on purpose — the qualities you actually want from an API you’re going to depend on.
Versioned contract
Everything lives under /v1. Breaking changes get a new version, not a surprise.
Rate limited per key
Every response carries standard RateLimit headers with your remaining budget; a 429 tells you exactly how long to wait.
Predictable errors
Failures come back as application/problem+json (RFC 9457) with a stable machine-readable code, not a wall of HTML.
Scoped, revocable keys
Restrict a key to specific scopes and IP addresses, and revoke it the instant it’s no longer needed.
Building an AI assistant instead?
If you want to point Claude, Cursor or another AI agent at your account, you don’t need to hand-roll against this API — connect over the Model Context Protocol instead. One-click setup, no key to paste, and the agent can research and build but can’t place a trade.
Explore AI Agent access (MCP)Included on Standard and above
The REST API is included on the Standard, Pro and TradeServer plans, and throughout your free trial. It is not part of the Starter plan.
Remember: an API key can do anything you can, including placing and cancelling real trades. Keep it secret, scope it down, and revoke it if it’s ever exposed.