Momentum trading signals for AI agents. Pay per call. No signup.

Your AI trading agent needs market signals. This API serves them — RSI, ADX, MACD, volume confirmation, composite scoring — and charges per call in USDC via the x402 protocol. No API keys. No subscriptions. No humans in the loop.

1. Agent calls GET /signal/NVDA
2. Gets HTTP 402 + payment instructions
3. Agent wallet signs USDC transfer on Base L2
4. Agent retries with payment header
5. Gets signal data. Done.

All payment logic is handled by the x402 protocol. If your agent has an x402-compatible wallet, it just works.

{
  "ticker": "NVDA",
  "signal": "BUY",
  "confidence": 0.65,
  "rsi": 42.18,
  "adx": 28.34,
  "macd": 1.2847,
  "macd_signal": 0.9213,
  "volume_ratio": 1.73,
  "atr_pct": 2.41,
  "price": 892.50,
  "change_pct": 2.14,
  "timestamp": "2026-04-15T14:30:00-04:00"
}

Install the x402 client SDK:

pip install x402

import httpx
from x402.clients.httpx import x402_payment_headers

response = httpx.get(
    "https://signal-api.fly.dev/signal/AAPL",
    headers=x402_payment_headers(wallet, network="eip155:8453")
)
print(response.json())

Works with any x402-compatible client (Python, TypeScript, Go, Rust, Java).

Composite momentum score from 4 weighted components:

• RSI (14) — oversold/overbought detection
• ADX (14) — trend strength filter (>25 = strong trend)
• MACD (12/26/9) — crossover + direction
• Volume ratio — current vs 20-day average (confirmation)

Score maps to BUY (>=30), SELL (<=-30), or HOLD. Confidence = |score| / 100.

cp .env.example .env
# Set EVM_ADDRESS to your Base L2 wallet
pip install -r requirements.txt
uvicorn main:app --host 0.0.0.0 --port 8000

MIT