engine_info

Engine version, API contract number, and health. Free (not quota-counted). Call once at the start of a session to confirm the engine is reachable and which contract it serves.

No parameters.

get_catalog

Fetch one engine reference catalog. Catalogs (cheap, cacheable per session): - 'operators' — comparison operators for condition expressions - 'execution-modes' — entry/exit anchors and fill algorithms, with the validity matrix by market type - 'stop-types' — stop-loss types, re-entry modes, and their parameters - 'sizing-methods' — position-sizing methods and their parameters - 'bar-frequencies' — supported bar frequencies and the signal x execution validity matrix (which combinations are allowed) - 'sections' — the full metric catalog: every statistic's stable id, display label, section, and description Fetch the relevant catalog BEFORE building a strategy or config; build only from values it lists — never guess parameter names or frequencies.

list_indicators

List indicators, or fetch one indicator's full schema. Cheap, cacheable per session. With no arguments: a compact catalog — ``{"indicators": [...], "count": N}`` — where each entry carries id, name, category, kind, and value_dtype (no description, to keep the discovery scan small). Use it to discover what exists. Pass name='rsi' (id or name, case-insensitive) to get that single indicator's complete entry including its description and params_schema — do this before adding an indicator to a strategy so its parameters are exactly right. Pass compact=False for full entries for everything (large; the MCP server may cap it and set ``truncated_by_mcp`` — prefer compact or name=). Wire optimization: the compact discovery path asks the engine to omit per-entry descriptions (``descriptions=false``) since they are stripped locally anyway; the name= and compact=False paths request them. This is a pure saving — if the engine ignores the param it returns full entries and the local compact strip still yields a lean result.

get_strategy_schema

JSON Schema for the strategy document (condition_tree + indicators). Fetch this before composing a strategy by hand; the validate_strategy tool checks against the same rules.

No parameters.

validate_strategy

Validate a strategy document without running a backtest. A cheap quota separate from backtest runs, so validate freely and ALWAYS before run_backtest. Args: strategy: The strategy document — name, indicators[], and condition_tree (see get_strategy_schema for the exact shape). injected_indicators: Names of custom time-series columns the caller will supply via data_inputs at run time, so conditions referencing them validate. Returns: On success: {"valid": true, "warmup_bars": ..., referenced indicators/columns}. On failure: {"valid": false, "errors": [...]} where each error carries a machine code, the location in the document, a message, and context (e.g. the list of valid column names). A failed validation is a NORMAL result, not an error — read the errors, fix the document, and validate again before running.

run_backtest

Run a historical backtest against the engine. Quota-counted and compute-bound. Validate the strategy first (validate_strategy is far cheaper). On a 504 compute timeout, do NOT retry the same request — reduce the date range, use a coarser frequency, or simplify the strategy. On 429/503, wait for the advertised Retry-After before retrying. Args: data_source: Either inline OHLCV ({"ohlcv": {dates, open, high, low, close, volume?}} as parallel arrays, ISO-8601 dates) or a server-side fetch ({"symbol", "start", "end", "frequency"} — requires a paid plan). strategy: Strategy document (indicators[] + condition_tree). Mutually exclusive with signals. signals: Precomputed signal series ({"dates": [...], "values": [-1|0|1, ...]}). Mutually exclusive with strategy. execution: Execution/cost/risk/sizing settings. Use values from get_catalog('execution-modes'/'stop-types'/'sizing-methods'); omit for engine defaults. benchmark: Optional benchmark data source (same shape as data_source) — adds benchmark-relative metrics. data_inputs: Optional custom time-series the strategy references (name -> {dates, values}). response_detail: 'summary' (default — headline metrics, smallest), 'stats' (every metric), 'full' (plus trades and series downsampled to a fixed, server-controlled number of points). include: Optional add-on blocks at summary/stats detail: 'trades', 'equity_curve', 'monthly_returns', 'yearly_returns'. trades_limit: Max trades returned when trades are included. Returns: The shaped result at the requested detail; an oversized result is thinned and marked ``truncated_by_mcp``. If the engine rejects the request as invalid (400/422), returns {"accepted": false, "error": ...} so you can fix the named field(s) and retry. Capacity, timeout, and permission failures (e.g. 429/503/504/401/403) raise a tool error carrying explicit recovery guidance.

get_latest_signal

Evaluate the strategy on the most recent bar only — no P&L, no stats. Returns the latest signal (-1/0/1), which condition slots fired, and the bar timestamp. Use for "what would this strategy do right now" questions; use run_backtest for performance.

compare_backtests

Run several strategies on the same data and compare side by side. One quota-counted call, but compute scales with the number of strategies. The engine enforces a wall-clock budget for the whole comparison; when it runs out mid-way the response carries "truncated": true and the remaining strategies are missing — report that to the user rather than re-running blindly. Args: data_source: Shared data source (same shape as run_backtest). strategies: List of {"label": str, "strategy": {...}, "execution": {...}?} entries. include_benchmark: Add a buy-and-hold benchmark to the comparison. response_detail: Shaping level applied to each strategy's result. trades_limit: Max trades per strategy when detail is 'full'. Returns: {"strategies": [{"label", "result"}, ...], "equity_curves": {...}}, each result shaped at the requested detail. Two truncation flags are distinct and may both appear: the engine's "truncated" (wall-clock budget exhausted mid-comparison — strategies are missing) and the MCP size-cap marker "truncated_by_mcp". A 400/422 rejection returns {"accepted": false, "error": ...}; capacity/timeout/permission failures raise a tool error.

compute_stats

Compute the engine's performance metrics from a returns series. Use when the returns came from somewhere other than run_backtest (an external system, a portfolio) — backtest results already include these statistics. Args: returns: Per-bar log returns as {"dates": [...], "values": [...]} parallel arrays (ISO-8601 dates). benchmark_returns: Optional benchmark series, same shape — adds alpha/beta/capture metrics. trades: Optional trade records (entry_date, exit_date, direction, return_net, ...) — adds trade-level metrics. risk_free_rate: Annual risk-free rate as a decimal. trading_days_per_year: Annualization factor. Returns: {"stats": {...}} — the metric set the API key's plan allows. See get_catalog('sections') for every metric's id and description.

search_tickers

Search available assets by ticker or name (relevance-ranked). Use to resolve a user's asset mention ("bitcoin", "S&P") to the exact ticker before requesting a server-side data fetch. asset_class filters to 'stocks', 'crypto', 'forex', or 'indices'.

list_tickers

List available tickers, optionally filtered by asset class. The full universe is very large, so the MCP server caps the returned list and marks it ``truncated_by_mcp`` — pass asset_class to narrow it, or use search_tickers to resolve a specific asset by name.

get_data_range

Available date range and estimated bar count for a symbol/frequency. Available on paid plans. Call before a server-side fetch so the requested start/end stay inside what the provider can deliver and the bar count stays inside the key's per-run limit.