CoinGecko API

Configuration

import { CoinGecko } from '@tundraconnect/coingecko';

// Keyless, demo tier
const demo = new CoinGecko();

// Demo tier with an API key (raises rate limits, still optional)
const demoWithKey = new CoinGecko({
  auth: { type: 'CUSTOM', environment: 'demo', apiKey: 'your-demo-key' },
});

// Pro tier — apiKey is required
const pro = new CoinGecko({
  auth: { type: 'CUSTOM', environment: 'pro', apiKey: 'your-pro-key' },
});

Credentials go through the standard auth option — { type: 'CUSTOM', environment, apiKey? }:

auth field	Default	Notes
environment	'demo'	'demo' or 'pro'. Selects the base URL and the auth header name.
apiKey	—	Optional for demo (keyless works). Required for pro.

auth.environment: 'pro' without an apiKey throws CONFIG_MISSING_API_KEY at construction time — see Errors.

The configured key is never readable back off the client. client.environment reports the tier and client.hasApiKey whether a key was supplied:

console.log(client.environment, client.hasApiKey); // 'demo' false

environment	Base URL	Auth header (sent only when apiKey is set)
'demo'	https://api.coingecko.com/api/v3	x-cg-demo-api-key
'pro'	https://pro-api.coingecko.com/api/v3	x-cg-pro-api-key

Endpoints

Method	Endpoint	Result
getPrice()	/simple/price	Prices for one or more coins/currencies
listCoins()	/coins/list	Every coin CoinGecko supports
getMarkets()	/coins/markets	Paginated market data (price, cap, ATH/ATL, ...)

import { CoinGecko } from '@tundraconnect/coingecko';

const client = new CoinGecko();

const prices = await client.getPrice({
  ids: ['bitcoin', 'ethereum'],
  vsCurrencies: ['usd', 'eur'],
  includeMarketCap: true,
});
console.log(prices.bitcoin?.usd, prices.bitcoin?.usd_market_cap);

const coins = await client.listCoins({ includePlatform: true });
console.log(coins.find((c) => c.id === 'bitcoin')?.platforms);

const markets = await client.getMarkets({
  vsCurrency: 'usd',
  order: 'market_cap_desc',
  perPage: 25,
  page: 1,
});
console.log(markets[0]?.current_price);

getPrice(options)

• vsCurrencies — CSV string or array; defaults to usd when omitted.
• ids / names / symbols — CSV string or array; CoinGecko defaults to ids=bitcoin when all three are omitted.
• includeMarketCap / include24hrVol / include24hrChange / includeLastUpdatedAt — booleans.
• precision — 'full' or a digit-count string.
• An unknown coin id is not an error: the response is HTTP 200 with an empty object.

listCoins(options)

• includePlatform — include per-platform contract addresses.
• status — 'active' or 'inactive'.

getMarkets(options)

• vsCurrency — required, singular (one snapshot currency per request).
• ids / names / symbols — CSV string or array.
• order, perPage (1-250, CoinGecko defaults to 100), page, sparkline, priceChangePercentage, precision.

See Errors for failure handling and Schemas for response validation.

---

← Back to CoinGecko