{"connect_hint":"claude mcp add --transport http synapse https://synapsediscovery.io/mcp/jsonrpc","description":"Point-in-time, survivorship-free financial data \u2014 equity prices, SEC fundamentals, fund holdings (SEC N-PORT), and FRED macro \u2014 exposed as Model Context Protocol tools.","docs":"https://synapsediscovery.io/docs","instructions":"POST a JSON-RPC 2.0 \"initialize\" to the endpoint, then \"tools/list\" to discover tools, then \"tools/call\". Resend the Mcp-Session-Id header on every request.","llms_txt":"https://synapsediscovery.io/llms.txt","mcp":{"authentication":{"anonymous":true,"api_key_header":"X-API-Key","note":"No API key needed to start: POST a JSON-RPC initialize and read the Mcp-Session-Id response header (anonymous free tier). Verify an email in-browser for the full free tier, or send \"X-API-Key: sd_live_...\" for a paid plan.","one_shot":"With an X-API-Key you may SKIP the initialize/Mcp-Session-Id handshake entirely \u2014 just POST a single tools/call. The handshake is only required for the keyless anonymous tier."},"endpoint":"https://synapsediscovery.io/mcp/jsonrpc","endpoints":{"health":"https://synapsediscovery.io/mcp/health","schema":"https://synapsediscovery.io/mcp/schema","tools":"https://synapsediscovery.io/mcp/tools"},"protocolVersion":"2025-06-18","transport":"streamable-http"},"name":"synapse-discovery","rest_api":"https://synapsediscovery.io/api/v1","tool_count":18}