Crypto market data API.Built for your product.

"""Python 3.10+. Run: python ticker.py btc-bitcoin. No third-party dependencies."""
import json
import os
import re
import sys
import time
from urllib.request import Request, urlopen
from urllib.error import HTTPError


def ticker(coin="btc-bitcoin"):
    if not re.fullmatch(r"[a-z0-9-]+", coin):
        raise ValueError("Use a CoinPaprika coin ID, such as btc-bitcoin.")
    key = os.getenv("COINPAPRIKA_API_KEY")
    base = "https://api-pro.coinpaprika.com/v1" if key else "https://api.coinpaprika.com/v1"
    request = Request(f"{base}/tickers/{coin}", headers={"Accept": "application/json", "User-Agent": "CoinPaprika-Developer-Example/1.0", **({"Authorization": key} if key else {})})
    for attempt in range(3):
        try:
            with urlopen(request, timeout=15) as response:
                data = json.load(response)
            price = data.get("quotes", {}).get("USD", {}).get("price")
            if not isinstance(price, (float, int)) or not data.get("last_updated"):
                raise ValueError("Price or source timestamp missing.")
            return {"id": data["id"], "price_usd": price, "source_updated_at": data["last_updated"]}
        except HTTPError as error:
            if error.code == 429 and attempt < 2:
                retry = error.headers.get("Retry-After", "")
                time.sleep(min(int(retry) if retry.isdigit() else 2 ** attempt, 60))
                continue
            raise RuntimeError(f"HTTP {error.code}: check your coin ID, plan and service status.") from None


if __name__ == "__main__":
    try:
        print(json.dumps(ticker(sys.argv[1] if len(sys.argv) > 1 else "btc-bitcoin"), indent=2))
    except Exception as error:
        print(str(error), file=sys.stderr)
        sys.exit(1)
# Set paid keys in a server environment. Cache according to your plan's refresh interval.

// Node.js 20+. Run: node ticker.mjs btc-bitcoin
// Paid access: set COINPAPRIKA_API_KEY in your server environment.
const coin = process.argv[2] || 'btc-bitcoin';
if (!/^[a-z0-9-]+$/.test(coin)) throw new Error('Use a CoinPaprika coin ID, such as btc-bitcoin.');
const key = process.env.COINPAPRIKA_API_KEY;
const base = key ? 'https://api-pro.coinpaprika.com/v1' : 'https://api.coinpaprika.com/v1';
async function ticker() {
  for (let attempt = 0; attempt < 3; attempt++) {
    const response = await fetch(`${base}/tickers/${coin}`, {
      headers: key ? { Authorization: key } : {},
      signal: AbortSignal.timeout(15000)
    });
    if (response.status === 429 && attempt < 2) {
      const retry = response.headers.get('Retry-After');
      const seconds = retry && /^\d+$/.test(retry) ? Number(retry) : 2 ** attempt;
      await new Promise(resolve => setTimeout(resolve, Math.min(seconds, 60) * 1000));
      continue;
    }
    if (!response.ok) throw new Error(`HTTP ${response.status}: check your coin ID, plan and service status.`);
    const data = await response.json();
    const price = data.quotes?.USD?.price;
    if (!Number.isFinite(price) || !data.last_updated) throw new Error('Price or source timestamp missing.');
    return { id: data.id, price_usd: price, source_updated_at: data.last_updated };
  }
}
try { console.log(JSON.stringify(await ticker(), null, 2)); }
catch (error) { console.error(error.message); process.exitCode = 1; }
// Cache responses in your application according to the plan refresh interval.
// Do not interpret a cached response as a real-time execution price.