{"protocolVersion": "0.3.0", "name": "Historical daily price, market-cap and volume time-series for a coin in any fiat currency ", "description": "Historical daily price, market-cap and volume time-series for a coin in any fiat currency from CoinGecko's keyless market_chart endpoint (JSON). Serves autonomous crypto-vs-fiat trend agents, backtesting bots, and agent-to-agent analytics needing multi-day price series without a key. Pay-per-call via x402 on Base. No charge on upstream failure.", "url": "https://api.hergertsynthora.com/v1/coingecko-crypto-price-history", "preferredTransport": "HTTP+JSON", "additionalInterfaces": [{"url": "https://api.hergertsynthora.com/v1/coingecko-crypto-price-history", "transport": "HTTP+JSON"}, {"url": "https://api.hergertsynthora.com/v1/a2a", "transport": "JSONRPC"}], "version": "1.0.0", "provider": {"organization": "SYNTHORA", "url": "https://hergertsynthora.com"}, "capabilities": {"streaming": false, "pushNotifications": false, "stateTransitionHistory": false}, "defaultInputModes": ["application/json"], "defaultOutputModes": ["application/json"], "skills": [{"id": "coingecko_crypto_price_history", "name": "coingecko crypto price history", "description": "Historical daily price, market-cap and volume time-series for a coin in any fiat currency from CoinGecko's keyless market_chart endpoint (JSON). Serves autonomous crypto-vs-fiat trend agents, backtesting bots, and agent-to-agent analytics needing multi-day price series without a key. Pay-per-call via x402 on Base. No charge on upstream failure.", "tags": ["coingecko", "crypto", "price", "history", "x402", "synthora", "m2m", "a2a"], "examples": ["{\"id\": \"bitcoin\", \"vs_currency\": \"usd\", \"days\": 7, \"interval\": \"daily\"}"], "inputModes": ["application/json"], "outputModes": ["application/json"], "inputSchema": {"type": "object", "properties": {"input": {"type": "string", "description": "Historical daily price, market-cap and volume time-series for a coin in any fiat currency from CoinGecko's keyless market_chart endpoint (JSON). Serves autonomous crypto-vs-fiat trend agents, backtest"}}}}], "securitySchemes": {"x402": {"type": "http", "scheme": "x402", "description": "HTTP 402 micropayment. 50000 atomic USDC on eip155:8453."}}, "security": [{"x402": []}], "x402": {"network": "eip155:8453", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "50000", "payTo": "0xEf879BFD6C4AccB8F795136de90246e1EC245e06", "resource": "https://api.hergertsynthora.com/v1/coingecko-crypto-price-history"}, "mcp": {"endpoint": "https://api.hergertsynthora.com/v1/mcp", "transport": "http-jsonrpc"}}