get_perp_contract_rules
Perpetual contract rules · read-only, idempotent, no account needed ·
scopes: read
Rules and current funding for one perpetual futures contract on one exchange: mark price, size step, minimum size, price tick, maximum leverage, funding rate per interval and annualised. Use when a limit price or leverage must fit the venue; not needed for market orders (sizing and preview round for you). Not for comparing exchanges (use compare_perp_quotes_across_venues or compare_funding_rates_across_venues). Inputs: symbol (base coin, e.g. BTC), venue (without an account: hyperliquid only). Prices in USD per coin, sizes in the base coin, rates as fractions. Next: size_position_by_risk.
Call it
MCP tools/call
{"name": "get_perp_contract_rules", "arguments": {"symbol": "BTC"}}REST
GET /v1/markets/{symbol}Inputs
| Name | Meaning (* required) |
|---|---|
symbol * | Base coin, e.g. BTC |
venue | Venue: sandbox, hyperliquid, okx, bybit or binance. Omitted: the agent's only venue, else hyperliquid, else your only connected venue, else sandbox |
Returns
| Field | Meaning and unit |
|---|---|
venue | Venue name |
symbol | Base coin |
mark_price | Mark price, USD per coin |
size_step | Smallest size increment, in the base coin (e.g. BTC), not USD |
min_size | Smallest order, in the base coin (e.g. BTC), not USD |
price_tick | Smallest price increment, USD per coin |
max_leverage | Highest leverage the venue allows for this contract |
funding_rate | Funding rate per interval, as a fraction (0.0001 = 0.01%); positive: longs pay |
funding_interval_hours | Hours between funding payments |
funding_annualized | funding_rate scaled to a year, as a fraction |
Rejections: error codes, each with what to do.