TradingCalc: deterministic trading math

What this skill does

Gives you exact answers to trading math questions instead of a language-model estimate. The TradingCalc MCP server exposes 77 deterministic tools across options, forex, risk statistics, crypto futures, on-chain token checks and prediction markets. The same inputs always return the same outputs, and the 12 core calculators are checked against canonical test vectors on a public page (https://tradingcalc.io/verify).

Do not work out a position size, a liquidation price, an option value or a Sharpe ratio yourself and present it as authoritative. A small arithmetic slip here is real financial risk for whoever acts on it. Call the tool.

When to use it

Options

• "What is this option worth?" (spot, strike, days, volatility) : workflow.run_black_scholes
• "Is this Deribit option fairly priced?" : workflow.run_black_scholes_live
• "What does my call or put pay off at price X, and where is breakeven?" : workflow.run_options_payoff
• "What yield do I get selling covered calls?" : workflow.run_covered_call_protective_put
• "What implied volatility does this price imply?" : workflow.run_implied_volatility
• "What does a straddle or strangle pay?" : workflow.run_straddle_strangle

Forex

• "How many lots should I trade to risk $200 with this stop?" : workflow.run_forex_position_size_live
• "What is a pip worth on 2 lots of EUR/USD?" : workflow.run_forex_pip_value (or _live for the account currency)
• "How close am I to a margin call?" : workflow.run_forex_margin_level
• "How much margin does this position need?" : workflow.run_forex_margin_required
• "What will holding overnight cost?" : workflow.run_forex_swap_cost
• "How correlated are these two pairs?" : workflow.run_forex_correlation_live

Risk and statistics

• "What is my VaR or expected shortfall?" : workflow.run_var_cvar
• "What is my real Sharpe ratio, and is it luck?" : workflow.run_sharpe_stats, workflow.run_dsr
• "How much of Kelly is safe?" : workflow.run_kelly_frontier
• "Give me a full risk report on this return series" : workflow.run_portfolio_tearsheet
• Also: workflow.run_garch, workflow.run_risk_parity, workflow.run_hurst_exponent,

workflow.run_cointegration, workflow.run_evt_tail_risk.

Crypto futures and perpetuals

• "What is my PnL on this trade?" : workflow.run_pnl_planning
• "Where does my position get liquidated?" : workflow.run_liquidation_safety
• "How much should I buy to risk exactly $200?" : workflow.run_position_sizing
• "Is this trade worth taking?" (entry, stop, target) : workflow.run_risk_reward
• "What is my breakeven including fees?" : workflow.run_breakeven_planning
• "How much funding will I pay holding 3 days?" : workflow.run_funding_cost
• "Run a full pre-trade check on this setup" : workflow.run_pre_trade_check

Also available: on-chain token and wallet checks (workflow.run_token_risk_check, workflow.run_wallet_flag_check, workflow.run_swap_price_impact) and prediction-market odds (workflow.run_odds_converter, workflow.run_prediction_market_edge).

For a coin-margined (inverse) contract such as Bybit BTCUSD or Deribit BTC-PERPETUAL, pass contractType: "inverse". Inverse math is not linear math with a flipped sign (it uses reciprocal-price formulas, and the average of fills is a harmonic mean), which is exactly the kind of detail worth delegating.

Steps

1. Pick the tool that fits the question from the list above, or list all tools with tools/list.

Full reference: https://docs.tradingcalc.io/api.

1. Call it. No signup is needed for normal use; anonymous calls are limited to 100 per day per IP,

and a free API key (200 per day) is issued on request by email. Sensible defaults apply when the user gives none: taker fees 0.02% open and 0.05% close, maintenance margin 0.5%.

1. Report the result to the user as a plain sentence with the actual numbers ("your position is

liquidated at $71,428, about 10.7% below entry"), not as raw JSON.

1. If the number matters for a real decision, call system.verify. It re-runs the canonical

test vectors of the 12 core calculators live and returns pass or fail per formula.

1. Every tools/call response carries a second content block with an ECDSA P-256 signature over

the first block's text. Call system.pubkey for the public key to check a response was not altered in transit.

Validation

• The numbers came from a tool response, not from your own estimate.
• contractType was "inverse" if and only if the instrument is coin-margined.
• For a financially significant result, system.verify returned "status": "pass" first.