stratify (npm)

JS/TS client, and npx stratify-mcp stdio bridge, for Stratify — real 1-minute NIFTY options data, honest backtests.

npm install stratify-mcp

Quickstart

import { StratifyClient } from "stratify-mcp";

// One-time: create an account and get a key. The key is shown once -- save it.
const signup = await StratifyClient.signup("[email protected]");
const client = new StratifyClient({ apiKey: signup.api_key });

const result = await client.runBacktest({
  legs: [
    { side: "sell", type: "CE", strike: { delta_near: 0.2 } },
    { side: "sell", type: "PE", strike: { delta_near: 0.2 } },
  ],
  // The reason for the trade, not just the trade.
  entry: { cadence: "weekly", dte: 3, time: "09:30", when: { vix: { gte: 15 } } },
  // Managed while it is open.
  rules: [
    { when: { pnl_pct_of_credit: { gte: 0.6 } }, then: "close" },
    { when: { leg_mark_mult: { gte: 2.0, leg: 0 } },
      then: { roll: { legs: [0], to: { delta_near: 0.2 } } }, max_times: 2 },
  ],
  portfolio: { stop_after_losses: 3, resume_after_days: 30 },
});

console.log(result.summary.total_pnl_rupees, result.summary.max_drawdown_rupees);
console.log(result.summary.ratios);  // sharpe, profit_factor, calmar (only above 30 trades)
console.log(result.honesty);        // out-of-sample split, walk-forward folds, deflated Sharpe
result.trades;                      // Array<Record<string, unknown>>, one entry per trade
result.equity_curve?.rows;          // Array<unknown[]>, columns named in .equity_curve.columns
console.log(result.report_url);     // shareable page with the full chart and every trade

Already have a key?

const client = new StratifyClient({ apiKey: "sk_live_..." });

Requires Node >=18 (uses the platform fetch; no HTTP dependency).

Why a client at all, when it's just JSON-RPC

There's no separate REST endpoint for run_backtest — every tool is reached through one POST /mcp speaking MCP JSON-RPC 2.0. This package exists so you don't hand-roll that envelope: client.runBacktest(...) is a typed async function, and errors come back as JS Error subclasses you can instanceof-check instead of a JSON-RPC error code you have to remember.

Errors

import { AuthenticationError, QuotaExceededError, ToolRefusalError } from "stratify-mcp";

try {
  const result = await client.runBacktest(spec);
} catch (err) {
  if (err instanceof AuthenticationError) { /* bad or revoked key */ }
  else if (err instanceof QuotaExceededError) { /* err.limit, err.retryAfterSeconds */ }
  else if (err instanceof ToolRefusalError) { /* err.message says why the server refused */ }
  else throw err;
}

Methods

| Method | Returns | |---|---| | runBacktest(spec, {lots, detail}) | Promise<BacktestResult> | | getBacktest(backtestId, detail?) | Promise<BacktestResult> | | describeCoverage() | Promise<Record<string, unknown>> | | explainMethodology(topic?) | Promise<Record<string, unknown>> | | listStrategies({order, limit}) | Promise<Record<string, unknown>> — {strategies: [...], bar: {...}, ...} | | search(query) / fetchDocument(id) | Promise<Record<string, unknown>> | | StratifyClient.signup(email) (static) | Promise<SignupResponse> — includes api_key, shown once |

detail: "summary" (aggregates only), "standard" (default — equity curve, breakdowns, first 25 trades), "full" (every stored trade).

fetch is named fetchDocument on the client so it doesn't collide with the global fetch this library uses internally.

npx stratify-mcp — for stdio-only clients

Most current MCP clients (claude.ai, Claude Desktop, Claude Code) speak Streamable HTTP directly — point them at https://stratify-mcp.aeon-labs.site/mcp with your key as a bearer header and skip this section entirely. This proxy exists only for a client that can only run a local stdio server:

{
  "mcpServers": {
    "stratify": {
      "command": "npx",
      "args": ["stratify-mcp-proxy"],
      "env": { "STRATIFY_API_KEY": "sk_live_..." }
    }
  }
}

It is a dumb pipe: one JSON-RPC message per line on stdin, forwarded verbatim to POST /mcp, the response written back as one line on stdout. It does not add features or change behavior versus calling the HTTP endpoint directly.

Development

npm install
npm test     # builds, then runs against a mocked fetch -- no live server or key needed

License

MIT.