CoinMarketCap x402 API

Pay it from Claude Code with a spending cap

1. Add Burnbound's MCP server to Claude Code with your agent's key:

   $ claude mcp add burnbound --scope user -e BURNBOUND_KEY=<your-agent-key> -- npx -y @burnbound/mcp

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   Get an agent key →
2. Give the agent a policy that allows this host and caps each payment, for example:

   allowed hosts    pro-api.coinmarketcap.com
   max per payment  0.01 USD
   daily cap        1 USD
   network          Base (eip155:8453)

3. Ask your agent to call this endpoint. It pays with fetch_paid, inside the policy: anything over the cap is blocked or waits for your approval, and nothing is signed for any other host.GET https://pro-api.coinmarketcap.com/x402/v3/cryptocurrency/quotes/latest?convert=USD&id=1%2C1027

More Market data x402 APIs

• API Toll Crypto — Cryptocurrency prices.
• Bags — Token data from the Bags API.
• CoinGecko — Crypto prices and liquidity pools.
• Hugen Tick — Foreign exchange prices (ticks).
• Kronos Signals — Bitcoin price forecasts.
• Massive — Financial market data: stocks and filings.

Learn more

• Quickstart: Claude Code and Cursor
• search_paid_apis: let the agent search this catalog
• Policies, caps and allowed hosts
• Security and trust model
• How Burnbound decides before paying