Short answer: Harpy is a local-first, invite-only autonomous trading terminal. It runs entirely on your own Windows machine across seven separately-leased modules: US equities (Alpaca), crypto (Kraken), Polymarket, Kalshi, UK/IRE/AU horse racing, UK/IRE/AU/NZ greyhounds, and an all-access paper sandbox. Every scan runs on your hardware, every decision is journaled locally, and every strategy is a plain-text document you can edit.
The rest of this page answers the questions we get asked most often, in the order they get asked. If yours isn’t here, the high-level tour in How the terminal works probably covers it.
What is Harpy?
Harpy is a desktop application suite. You install the module for the market you want to trade, paste in the API keys you already have for that market, and on first launch a blocking wizard sets up the scan cadence on your machine. The scanner fires every few minutes for position monitoring and every 30–45 minutes for a deeper research pass. A local dashboard (installed alongside) reads the scanner’s on-disk output live in your browser.
Does Harpy connect to my broker?
Yes, but only with API keys you paste into the setup wizard on your own machine. We never hold, transmit, or store broker credentials remotely. Every order is placed against your existing exchange account by a process running on your hardware, signed with keys that never leave your computer.
Is Harpy a signal service?
No. There is no “pick of the day” emailed at 9:15 a.m., no shared model serving the same recommendations to thousands of subscribers, no copy-trading layer, and no managed account. The scanners run on your machine, against your watchlist, with your edits to the strategy document. Two Harpy users running the same module on the same day will not, in general, generate the same target list.
How much does Harpy cost?
Each installer is leased independently for 31 days. Pricing is set per module and is communicated at invite time, not published on the marketing site. There are no per-trade fees, no spread markups, no AUM percentages, and no upsells inside the application.
Do I need a third-party subscription to run it?
Yes. Harpy’s scanner runs on top of an AI-research provider that you supply. Today that means an active Anthropic Claude subscription (or an Anthropic API key). A bring-your-own-model mode that lets you run everything against a local model instead is on the near-term roadmap. All inference happens through your account; we don’t resell or wrap third-party access.
Can I run Harpy in paper mode?
Yes. The Paper installer unlocks every module simultaneously in paper mode with simulated fills priced from real exchange data. The Trade and Crypto live installers also default to paper until you explicitly enable a live broker connection. We recommend a full week of paper observation before flipping any live switches.
What operating systems does Harpy support?
Windows 10 and Windows 11, x64 only. Harpy uses your operating system’s built-in task scheduler to fire cycles and a per-user data folder for credential storage. Native macOS and Linux builds are not on the public roadmap.
Where does my data live?
Every scan, journal entry, target file, and credential lives in a private per-user folder on your own disk. We don’t maintain a hosted database, don’t collect telemetry beyond offline license validation, and don’t see your trades. The license check is a once-per-launch cryptographic signature verification against a 31-day lease; you can pull the network cable mid-cycle and the scanner keeps running on its next fire.
Is Harpy regulated?
Harpy itself is software; it is not a broker, not an investment adviser, and not a regulated financial entity. The brokers and exchanges Harpy connects to carry their own regulatory regimes: Alpaca is a US-registered broker-dealer, Kraken is a US-registered MSB and a multi-jurisdictional VASP, Kalshi is a CFTC-designated contract market (US only), Polymarket settles on-chain and is geo-restricted in some jurisdictions, and Betfair operates under the UK Gambling Commission, IGB, and AU state regulators respectively.
Can I edit the trading strategy?
Yes — and we expect you to. Each module ships with a plain-text strategy document that spells out the confidence floors, sizing math, rejection conditions, data-source hierarchy, daily budget, and jurisdiction filters. Edit it on disk and the next scheduled scan picks up your version. Our published version is a recommendation, not a moat.
How do I get an invite?
Leave your email on the apply form on the front page. We open invitations in tightly-metered waves, typically a few dozen per batch. There is no referral program, no affiliate, no growth-hack drip. A waitlist is not a rejection.