@pineforge/codegen-mcp

Self-contained stdio MCP server: an AI agent writes PineScript v6, and the bundled pineforge-engine transpiles it to C++ and backtests it against Binance market data — all in one container, in-process. Fully local — the image bundles the pineforge-codegen transpiler, so Pine → C++ → backtest run with no host Docker daemon. No API key, nothing leaves the box.

Tools

name	runs on	purpose
transpile_pine	in-process	Pine v6 → C++ translation unit (transpile-only)
list_engine_params	local (no I/O)	Catalog of every overrides + runtime knob accepted by the backtests
backtest_pine	in-process	Single backtest of a Pine source against an OHLCV CSV
backtest_pine_grid	in-process	Cartesian sweep of inputs × overrides reusing one compile
fetch_binance_ohlcv	Binance public API	Write a backtest-ready CSV from Binance spot or USDT-perp klines
binance_symbols	Binance public API	List / filter Binance symbols (5-min in-process cache)
engine_info	local (no I/O)	Report the bundled engine: mode, baked-in flag, version

Install

Runs as a self-contained container over stdio — engine bundled, in-process, no host Docker daemon, no API key. Mount a working dir at /work so the server can read/write your CSVs:

docker run --rm -i -v "$PWD:/work" ghcr.io/pineforge-4pass/pineforge-codegen-mcp:latest

Only requirement: Docker, and outbound network for the Binance fetch tools. Wire it into your MCP client below.

Client configuration

Mount a directory at /work; point fetch_binance_ohlcv / backtest_pine at paths under it. (-i is required; never add -t — a TTY corrupts the stdio JSON-RPC stream.)

Claude Desktop / Cursor / generic JSON

{
  "mcpServers": {
    "pineforge-codegen": {
      "command": "docker",
      "args": [
        "run", "--rm", "-i",
        "-v", "${workspaceFolder}:/work",
        "ghcr.io/pineforge-4pass/pineforge-codegen-mcp:latest"
      ]
    }
  }
}

(In Cursor: Settings → MCP → New MCP Server → paste the above.)

Claude Code CLI

claude mcp add pineforge-codegen \
  -- docker run --rm -i -v "$PWD:/work" ghcr.io/pineforge-4pass/pineforge-codegen-mcp:latest

list_engine_params — discover knobs

Free, local, zero-I/O catalog of every key accepted by backtest_pine / backtest_pine_grid, split into two groups:

• strategy_overrides — the 9 strategy(...) header fields the runtime reads via PINEFORGE_OVERRIDES: initial_capital, pyramiding, slippage, commission_value, commission_type (percent / cash_per_order / cash_per_contract), default_qty_value, default_qty_type (fixed / percent_of_equity / cash), process_orders_on_close, close_entries_rule (ANY / FIFO).
• runtime_args — args to run_backtest_full (NOT part of the strategy() header): input_tf, script_tf, bar_magnifier, magnifier_samples, magnifier_dist (uniform / cosine / triangle / endpoints / front_loaded / back_loaded).

Each entry is {key, type, enum?, description}. Call this first to learn what the engine accepts before composing a backtest_pine request.

backtest_pine example

{
  "source": "//@version=6\nstrategy(\"sma cross\")\n...",
  "ohlcv_csv_path": "./btcusdt_15m_7d.csv",

  // Optional: override Pine input.*() values without touching the source.
  // Keys = the second arg of input.*(...) (e.g. "Fast Length").
  "inputs":    { "Fast Length": 8, "Slow Length": 21 },

  // Optional: override strategy(...) header fields. Each key is typed —
  // call list_engine_params for the catalog.
  "overrides": {
    "initial_capital":    100000,
    "default_qty_type":   "percent_of_equity",
    "default_qty_value":  10,
    "commission_type":    "percent",
    "commission_value":   0.04,
    "slippage":           2,
    "pyramiding":         0,
    "process_orders_on_close": true,
    "close_entries_rule": "ANY"
  },

  // Optional: engine runtime args (NOT strategy() header). Use script_tf
  // to aggregate the input CSV into a coarser strategy timeframe — the
  // engine REJECTS script_tf finer than input_tf with a structured error
  // ({"engine":"pineforge","error":"..."}, exit code 1).
  "runtime": {
    "input_tf":          "15",
    "script_tf":         "60",
    "bar_magnifier":     true,
    "magnifier_samples": 8,
    "magnifier_dist":    "endpoints"
  }
}

inputs is forwarded as the PINEFORGE_INPUTS env var to the engine, overrides as PINEFORGE_OVERRIDES, and each runtime field as a separate PINEFORGE_INPUT_TF / PINEFORGE_SCRIPT_TF / PINEFORGE_BAR_MAGNIFIER / PINEFORGE_MAGNIFIER_SAMPLES / PINEFORGE_MAGNIFIER_DIST env var. Empty / unset → defaults from strategy.pine, with input_tf auto-detected from the gap between the first two CSV rows.

Returns the same JSON schema as the standalone pineforge-engine Docker image:

{
  "engine": "pineforge",
  "summary": { "total_trades": 49, "net_pnl": -190.85, ... },
  "applied_inputs":    { "Fast Length": "8", "Slow Length": "21" },
  "applied_overrides": { "default_qty_value": "5" },
  "trades": [ ... ],
  "elapsed_seconds": 0.0042,
  "_meta": { "strategy_cpp_bytes": 5079, "image": "ghcr.io/.../pineforge-engine:latest" }
}

backtest_pine_grid — parameter sweep

Transpiles the Pine source once (locally, in-container) then runs the same compiled binary against the cartesian product of inputs × overrides. Returns a ranked list plus the top entry under best.

{
  "source": "//@version=6\nstrategy(\"macd\")\n...",
  "ohlcv_csv_path": "./btcusdt_15m_7d.csv",

  // Each axis is {key: list-of-values}. All combinations are tried.
  "inputs": {
    "Fast Length": [8, 12, 19],
    "Slow Length": [21, 26, 39]
  },
  "overrides": {
    "default_qty_value": [1, 5],
    "commission_value":  [0.04]
  },

  // Optional knobs:
  "fixed_inputs":     { "Source": "close" },   // applied to every combo
  "fixed_overrides":  {},                      // typed strategy() overrides
  "runtime":          { "input_tf": "15",      // engine runtime args, fixed
                        "script_tf": "60" },   // across the sweep
  "max_combinations": 64,                      // hard cap
  "concurrency":      2,                       // parallel docker runs
  "include_trades":   false,                   // omit per-trade lists
  "sort_by":          "net_pnl"                // ranking metric
}

fetch_binance_ohlcv — pull market data

Writes a backtest-ready CSV (header timestamp,open,high,low,close,volume, timestamp = open time in UNIX ms UTC) from Binance's public endpoints. No auth required. Requests > 1000 bars are paginated automatically. Output path is subject to the same cwd scope as ohlcv_csv_path (relax with PINEFORGE_ALLOW_ANYWHERE=1).

{
  "symbol":      "BTCUSDT",
  "interval":    "15m",          // 1s, 1m, 3m, 5m, 15m, 30m, 1h, 2h, 4h, 6h, 8h, 12h, 1d, 3d, 1w, 1M
  "market":      "spot",         // or "usdt_perp" for USDT-margined perpetual futures
  "limit":       672,            // total bars; > 1000 paginates
  "output_path": "./btcusdt_15m_7d.csv"
  // Optional: "start_time" / "end_time" in UNIX ms UTC.
}

binance_symbols — discover / validate symbols

Returns the list of symbols available on the Binance public API for OHLCV fetching. Cached 5 min in-process. Use this to validate a symbol before calling fetch_binance_ohlcv.

{
  "market":        "usdt_perp",
  "query":         "BTC",         // case-insensitive substring match
  "quote_asset":   "USDT",
  "status":        "TRADING",
  "contract_type": "PERPETUAL",   // futures-only filter
  "limit":         50
}

Filesystem scope

By default, OHLCV paths must be inside the current working directory of the MCP server process. Override with:

export PINEFORGE_ALLOW_ANYWHERE=1

Other env vars

var	default	purpose
PINEFORGE_IMAGE	ghcr.io/pineforge-4pass/pineforge-engine:latest	Engine image used for transpile + backtest
PINEFORGE_ALLOW_ANYWHERE	0	Allow OHLCV paths outside cwd
PINEFORGE_DOCKER_TIMEOUT_MS	120000	Hard kill for docker pull / docker run