paper_sim

io.github.Marginpad/sdk · Verify this server

The whole paper-trading simulation, configurable. By default this engine is deliberately easy: a market order fills whole at the live price, maintenance margin is a flat 0.5%, the balance is a scorecard that never refuses an open, and there is no latency, no size impact and no partial fill. That is right for learning and optimistic for proving out a bot. This sets any of it: the book size your results are measured against and whether it is a real budget (margin_enforced), what crossing the book costs on entry and exit (slippage, slippage_bps, impact_bps_per_100k), how long your order is in flight (latency_ms), whether orders fill part-way (partial_fills, min_fill_pct), how often the venue refuses (reject_rate_pct), your own fee (taker_bps), funding (funding, funding_mult) and where liquidation sits (margin_venue, margin_tiers, mmr_pct). Easiest route: pass a preset - frictionless, realistic, binance, bybit, okx, hyperliquid, thin_book or brutal. Reading returns every field with its range, its default and what it changes, the presets, and what a fill would look like right now. Out-of-range values are refused, never clamped. Positions keep the simulation they were filled under. Requires an API key.