{"service":"CryptoRetail Investment Calculator API","version":"1.0.0","description":"Returns historical investment returns for major cryptocurrencies.","pricing":{"pricePerQuery":"$0.02","currency":"USDC","network":"Base (mainnet)","protocol":"x402"},"endpoint":{"method":"GET","path":"/v1/calculate","parameters":{"symbol":{"type":"string","required":true,"description":"Cryptocurrency ticker symbol","supported":["BTC","ETH","SOL","XRP","DOGE","ADA","AVAX"],"example":"BTC"},"amount":{"type":"number","required":true,"description":"Investment amount in USD","example":1000},"date":{"type":"string","required":true,"format":"YYYY-MM-DD","description":"Purchase date (must be in the past)","example":"2021-07-26"}}},"mcp":{"endpoint":"POST /mcp","transport":"Streamable HTTP","tool":"calculate_crypto_return","description":"MCP-compatible endpoint for AI agents. Handles x402 payment automatically."},"links":{"website":"https://cryptoretail.store","x402_protocol":"https://x402.org","mcp_protocol":"https://modelcontextprotocol.io"}}