Hyperliquid API Reference

⚠️ **Trading warning / Avertissement trading** : informational only, not investment advice. This is a reference document, not a trading tool: it places no orders and needs no key, but the actions it catalogues include the signed exchange calls that move real money on mainnet, so treat it as a map of powerful machinery, not as an invitation. No entry here promises a return. Curated by Skill Harbor: the compact API reference of HyperGrok, Galleon Labs' seven-agent trading desk for Hyperliquid, stated as checked against the official documentation on 2026-08-16, with a pointer to fetch the live docs page whenever a field matters. It covers the endpoints and envelopes for mainnet and testnet (the unsigned info endpoint whose response is the bare payload, and the exchange endpoint whose signed body carries the action, nonce, signature and optional vault address and expiry), the full table of info request types with their parameters and return shapes (market metadata and contexts, book, candles with the 5,000-candle ceiling, funding history and cross-venue predicted fundings with the warning to normalise by each venue's own funding interval, account state, orders, fills, funding, ledger, portfolio, fees, rate limits, roles and sub-accounts), and the full table of exchange actions with each one's signing scheme and whether the desk uses it at all (orders, cancels, modifies and leverage updates yes; fund transfers, withdrawals, builder fees and staking marked no). It then gives the vocabularies a caller actually needs: order fields and statuses, the long order-status list including every rejection reason, what the SDKs do when they sign (the two EIP-712 schemes, nonce rules, lowercase addresses, numbers as strings), asset id arithmetic for perps, spot and HIP-3 dexs, tick and lot rules (five significant figures, decimals from size decimals, the 10 USD minimum, open-order caps), rate limits per IP and per address with their weights, the WebSocket subscription list and heartbeat rules, a table of common error strings, and the trading facts the desk quotes (hourly funding paid on the oracle price, the mark price driving margin and triggers, base fee rates, and testnet's tighter margin tiers). From the galleonlabs/hypergrok-trading-desk repository (MIT). Honest caveats: a reference ages as the API evolves, so the skill itself tells you to fetch the official page for anything load-bearing; desk policy marks in the tables are this desk's rules, not properties of the API; and knowing an action exists says nothing about whether using it is wise. Skill Harbor never reviews the code, review it yourself before use.