Crypto Signal API Server

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crypto-signal-api

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Real-time cryptocurrency trading signals powered by technical analysis. Fetches live data from Binance and computes RSI, MACD, EMA, Bollinger Bands, Stochastic RSI, ATR, and volume analysis to generate actionable BUY/SELL/HOLD signals.

No API key required — uses Binance public market data.

Quick Start

npm install
npm start        # REST API on http://localhost:3100
npm run mcp      # MCP server (stdio, for AI agents)

REST API Endpoints

GET /api/v1/signal/:symbol

Combined trading signal with full indicator breakdown.

curl http://localhost:3100/api/v1/signal/BTCUSDT
curl http://localhost:3100/api/v1/signal/ETHUSDT?interval=4h

Response:

{
  "symbol": "BTCUSDT",
  "interval": "1h",
  "signal": {
    "action": "BUY",
    "strength": "moderate",
    "confidence": 58,
    "score": 4,
    "details": [...]
  },
  "indicators": {
    "price": 87250.50,
    "rsi": 35.2,
    "macd": { "MACD": -120.5, "signal": -95.3, "histogram": -25.2 },
    "ema": { "ema9": 87100, "ema21": 87400, "ema50": 88200 },
    "bollingerBands": { "upper": 89500, "middle": 87800, "lower": 86100 },
    "stochRsi": { "k": 15.3, "d": 18.7 },
    "atr": 850.5,
    "volume": { "current": 1250.5, "average": 980.3, "ratio": 1.28 }
  }
}

GET /api/v1/indicators/:symbol

Technical indicators only (no signal).

GET /api/v1/candles/:symbol

Raw OHLCV candle data.

Param	Default	Description
interval	1h	1m, 5m, 15m, 1h, 4h, 1d
limit	100	Max 500

GET /api/v1/screener

Scan top coins by volume with signals for each.

curl http://localhost:3100/api/v1/screener?limit=10&interval=4h

MCP Server (for AI Agents)

Run as an MCP tool server over stdio:

node src/mcp-server.js

Available Tools

Tool	Description
get_crypto_signal	Trading signal + indicators for a pair
get_crypto_indicators	Detailed technical indicators
screen_crypto_market	Scan top coins with signals

Claude Desktop Config

{
  "mcpServers": {
    "crypto-signals": {
      "command": "node",
      "args": ["/path/to/crypto-signal-api/src/mcp-server.js"]
    }
  }
}

Signal Logic

Score	Action	Strength
≥ +4	STRONG_BUY	strong
+2 to +3	BUY	moderate
-1 to +1	HOLD	weak
-2 to -3	SELL	moderate
≤ -4	STRONG_SELL	strong

Indicators scored: RSI, MACD histogram, EMA alignment, Bollinger Band position, Stochastic RSI, Volume ratio.

License

MIT

Related projects

• 🧰 lazymac-mcp — Single MCP server exposing 15+ lazymac APIs as tools for Claude Code, Cursor, Windsurf
• ✅ lazymac-api-healthcheck-action — Free GitHub Action to ping any URL on a cron and fail on non-2xx
• 🌐 api.lazy-mac.com — 36+ developer APIs, REST + MCP, free tier

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