Coingecko Agent Skill

# .env file
COINGECKO_API_KEY=your_api_key_here
COINGECKO_API_TYPE=demo  # or 'pro'

// Configuration for both Demo and Pro APIs
const CONFIG = {
  demo: {
    baseUrl: 'https://api.coingecko.com/api/v3/onchain',
    headerKey: 'x-cg-demo-api-key',
    rateLimit: 30, // calls per minute
  },
  pro: {
    baseUrl: 'https://pro-api.coingecko.com/api/v3/onchain',
    headerKey: 'x-cg-pro-api-key',
    rateLimit: 500, // calls per minute (varies by plan)
  },
};

const apiType = process.env.COINGECKO_API_TYPE || 'demo';
const apiKey = process.env.COINGECKO_API_KEY;

const BASE_URL = CONFIG[apiType].baseUrl;
const HEADER_KEY = CONFIG[apiType].headerKey;

// Solana network identifier
const NETWORK = 'solana';

async function getTokenPrice(tokenAddress: string): Promise<number | null> {
  const url = `${BASE_URL}/simple/networks/${NETWORK}/token_price/${tokenAddress}`;

  const response = await fetch(url, {
    headers: {
      [HEADER_KEY]: apiKey,
      'Accept': 'application/json',
    },
  });

  if (!response.ok) {
    throw new Error(`API error: ${response.status}`);
  }

  const data = await response.json();
  return data.data?.attributes?.token_prices?.[tokenAddress] ?? null;
}

// Usage
const USDC = 'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v';
const price = await getTokenPrice(USDC);
console.log(`USDC Price: $${price}`);

async function getTokenPrices(addresses: string[]): Promise<Record<string, TokenPriceData>> {
  const addressList = addresses.join(',');
  const url = `${BASE_URL}/simple/networks/${NETWORK}/token_price/${addressList}`;

  const params = new URLSearchParams({
    include_market_cap: 'true',
    include_24hr_vol: 'true',
    include_24hr_price_change: 'true',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.attributes || {};
}

interface TokenData {
  address: string;
  name: string;
  symbol: string;
  decimals: number;
  image_url: string;
  price_usd: string;
  fdv_usd: string;
  market_cap_usd: string;
  total_supply: string;
  volume_usd: {
    h24: string;
  };
  price_change_percentage: {
    h24: string;
  };
}

async function getTokenData(address: string): Promise<TokenData> {
  const url = `${BASE_URL}/networks/${NETWORK}/tokens/${address}?include=top_pools`;

  const response = await fetch(url, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.attributes;
}

async function getMultipleTokens(addresses: string[]): Promise<TokenData[]> {
  const addressList = addresses.join(',');
  const url = `${BASE_URL}/networks/${NETWORK}/tokens/multi/${addressList}`;

  const response = await fetch(url, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

interface PoolData {
  address: string;
  name: string;
  pool_created_at: string;
  base_token_price_usd: string;
  quote_token_price_usd: string;
  base_token_price_native_currency: string;
  fdv_usd: string;
  market_cap_usd: string;
  reserve_in_usd: string;
  price_change_percentage: {
    m5: string;
    h1: string;
    h6: string;
    h24: string;
  };
  transactions: {
    m5: { buys: number; sells: number };
    h1: { buys: number; sells: number };
    h24: { buys: number; sells: number };
  };
  volume_usd: {
    m5: string;
    h1: string;
    h6: string;
    h24: string;
  };
}

async function getPoolData(poolAddress: string): Promise<PoolData> {
  const url = `${BASE_URL}/networks/${NETWORK}/pools/${poolAddress}`;

  const params = new URLSearchParams({
    include: 'base_token,quote_token,dex',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.attributes;
}

async function getTrendingPools(duration: '5m' | '1h' | '6h' | '24h' = '24h'): Promise<PoolData[]> {
  const url = `${BASE_URL}/networks/trending_pools`;

  const params = new URLSearchParams({
    include: 'base_token,quote_token,dex,network',
    duration,
    page: '1',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

// Filter for Solana pools
async function getSolanaTrendingPools(): Promise<PoolData[]> {
  const allPools = await getTrendingPools();
  return allPools.filter(pool => pool.network === 'solana');
}

async function getTopPools(page: number = 1): Promise<PoolData[]> {
  const url = `${BASE_URL}/networks/${NETWORK}/pools`;

  const params = new URLSearchParams({
    include: 'base_token,quote_token,dex',
    page: page.toString(),
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

async function searchPools(query: string): Promise<PoolData[]> {
  const url = `${BASE_URL}/search/pools`;

  const params = new URLSearchParams({
    query,
    network: NETWORK,
    include: 'base_token,quote_token,dex',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

// Search for SOL pools
const solPools = await searchPools('SOL');

interface OHLCVData {
  timestamp: number;
  open: number;
  high: number;
  low: number;
  close: number;
  volume: number;
}

async function getPoolOHLCV(
  poolAddress: string,
  timeframe: 'day' | 'hour' | 'minute' = 'hour',
  aggregate: number = 1,
  limit: number = 100
): Promise<OHLCVData[]> {
  const url = `${BASE_URL}/networks/${NETWORK}/pools/${poolAddress}/ohlcv/${timeframe}`;

  const params = new URLSearchParams({
    aggregate: aggregate.toString(),
    limit: limit.toString(),
    currency: 'usd',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();

  return data.data?.attributes?.ohlcv_list?.map((candle: number[]) => ({
    timestamp: candle[0],
    open: candle[1],
    high: candle[2],
    low: candle[3],
    close: candle[4],
    volume: candle[5],
  })) || [];
}

// Get hourly candles
const hourlyCandles = await getPoolOHLCV(poolAddress, 'hour', 1, 24);

// Get 5-minute candles
const fiveMinCandles = await getPoolOHLCV(poolAddress, 'minute', 5, 100);

interface TradeData {
  block_number: number;
  block_timestamp: string;
  tx_hash: string;
  tx_from_address: string;
  from_token_amount: string;
  to_token_amount: string;
  price_from_in_currency_token: string;
  price_to_in_currency_token: string;
  price_from_in_usd: string;
  price_to_in_usd: string;
  kind: 'buy' | 'sell';
  volume_in_usd: string;
}

async function getRecentTrades(poolAddress: string): Promise<TradeData[]> {
  const url = `${BASE_URL}/networks/${NETWORK}/pools/${poolAddress}/trades`;

  const response = await fetch(url, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

interface DexData {
  id: string;
  name: string;
}

async function getSolanaDexes(): Promise<DexData[]> {
  const url = `${BASE_URL}/networks/${NETWORK}/dexes`;

  const response = await fetch(url, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => ({
    id: item.id,
    name: item.attributes.name,
  })) || [];
}

async function getMegafilterPools(options: {
  dexes?: string[];
  minLiquidity?: number;
  minVolume?: number;
  sort?: string;
}): Promise<PoolData[]> {
  const url = `${BASE_URL}/pools/megafilter`;

  const params = new URLSearchParams({
    networks: NETWORK,
    page: '1',
  });

  if (options.dexes) {
    params.set('dexes', options.dexes.join(','));
  }
  if (options.minLiquidity) {
    params.set('min_reserve_in_usd', options.minLiquidity.toString());
  }
  if (options.minVolume) {
    params.set('min_h24_volume_usd', options.minVolume.toString());
  }
  if (options.sort) {
    params.set('sort', options.sort);
  }

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

// Get newest Pump.fun pools
const pumpfunPools = await getMegafilterPools({
  dexes: ['pump-fun'],
  sort: 'pool_created_at_desc',
});

// Get high-volume Raydium pools
const raydiumPools = await getMegafilterPools({
  dexes: ['raydium'],
  minVolume: 100000,
  minLiquidity: 50000,
});

class RateLimiter {
  private calls: number[] = [];
  private maxCalls: number;
  private windowMs: number = 60000; // 1 minute

  constructor(maxCallsPerMinute: number) {
    this.maxCalls = maxCallsPerMinute;
  }

  async waitForSlot(): Promise<void> {
    const now = Date.now();
    this.calls = this.calls.filter(t => now - t < this.windowMs);

    if (this.calls.length >= this.maxCalls) {
      const oldestCall = this.calls[0];
      const waitTime = this.windowMs - (now - oldestCall);
      await new Promise(resolve => setTimeout(resolve, waitTime));
    }

    this.calls.push(Date.now());
  }
}

// Usage
const rateLimiter = new RateLimiter(30); // Demo API

async function fetchWithRateLimit(url: string): Promise<any> {
  await rateLimiter.waitForSlot();
  const response = await fetch(url, {
    headers: { [HEADER_KEY]: apiKey },
  });
  return response.json();
}

async function safeApiCall<T>(url: string): Promise<T | null> {
  try {
    const response = await fetch(url, {
      headers: { [HEADER_KEY]: apiKey },
    });

    if (response.status === 401) {
      throw new Error('Invalid API key');
    }
    if (response.status === 429) {
      throw new Error('Rate limit exceeded - wait before retrying');
    }
    if (response.status === 404) {
      console.warn('Resource not found');
      return null;
    }
    if (!response.ok) {
      throw new Error(`API error: ${response.status}`);
    }

    return response.json();
  } catch (error) {
    console.error('CoinGecko API error:', error);
    throw error;
  }
}

coingecko/
├── SKILL.md                      # This file
├── resources/
│   ├── api-reference.md          # Complete API endpoint reference
│   ├── network-dex-ids.md        # Solana network and DEX identifiers
│   └── token-addresses.md        # Common Solana token addresses
├── examples/
│   ├── token-prices/
│   │   └── get-token-price.ts    # Token price examples
│   ├── pools/
│   │   └── pool-data.ts          # Pool data examples
│   ├── ohlcv/
│   │   └── ohlcv-charts.ts       # OHLCV chart examples
│   ├── trades/
│   │   └── recent-trades.ts      # Trade history examples
│   └── integration/
│       └── full-client.ts        # Complete client example
├── templates/
│   └── coingecko-client.ts       # Production-ready client template
└── docs/
    └── troubleshooting.md        # Common issues and solutions