Token Price API

Token Price API

Real-time crypto prices via CoinGecko -- price, 24h change, market cap, volume. 10,000+ tokens supported. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "token-price": {
      "url": "https://token-price.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://token-price.api.klymax402.com/api/price" \
  -H "Content-Type: application/json" \
  -d '{"token":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
finance_get_token_price	POST	/api/price	$0.003	Get real-time crypto token price with 24h change, market cap, and volume

finance_get_token_price

Use this when you need the current price of any cryptocurrency or token. Returns real-time market data in JSON.

Parameters

Name	Type	Required	Description
token	string	yes	Token name or CoinGecko ID (e.g. bitcoin, ethereum, solana)
currency	string	no	Target currency for price (default: usd). Supports usd, eur, gbp, etc.

Returns

• price -- current price in the requested currency
• change24h -- 24-hour price change percentage
• marketCap -- total market capitalization in USD
• volume24h -- 24-hour trading volume in USD
• token -- token identifier used
• currency -- target currency for the price

Example response:

{"price":3128.60,"change24h":2.45,"marketCap":376000000000,"volume24h":15200000000,"token":"ethereum","currency":"usd"}

When to use: quick price lookups, portfolio valuation, and market monitoring. Supports 10,000+ tokens by CoinGecko ID (e.g. bitcoin, ethereum, solana, dogecoin).

Not for: stock prices (use finance_get_stock_price), token safety (use token_check_safety), historical candles (use token_get_ohlcv_history), currency conversion (use finance_convert_currency).

Example agent prompts

• "The current price of any cryptocurrency or token"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
• Network: Base L2 (eip155:8453)
• Asset: USDC
• Facilitator: Coinbase CDP (primary), PayAI (fallback)
• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt
• Full API reference: https://klymax402.com/llms-full.txt
• Live stats: https://klymax402.com/stats

License

MIT