{"auth_hint":"No key = anonymous trial quota. Add --header \"X-API-Key: sd_live_...\" (paid plan) to use your plan limits, or verify an email in-protocol via request_email_verification(email) for the full free tier (100/day).","connect_hint":"claude mcp add --transport http synapse https://synapsediscovery.io/mcp/jsonrpc","connect_hint_authenticated":"claude mcp add --transport http synapse https://synapsediscovery.io/mcp/jsonrpc --header \"X-API-Key: sd_live_...\"","description":"Point-in-time, survivorship-free financial data \u2014 equity prices, SEC fundamentals, fund holdings (SEC N-PORT), and macro (US Treasury / Fed / BLS / BEA) \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. (With an X-API-Key you may skip the handshake and POST a single tools/call directly.)","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","onboarding":{"anonymous_try":"Connect with no key to try (low daily cap).","note":"Hit the anonymous limit? Verify an email for the full free tier (100/day) \u2014 the ONE human step: a human reads the emailed code back to the agent; a durable API key is returned in-band. Or send an X-API-Key for a paid plan. Cost: 1 unit per tools/call; every result carries _quota.","self_serve_tool":"request_email_verification(email) \u2014 trigger the verify email in-protocol.","upgrade_url":"https://synapsediscovery.io/pricing?ref=mcp","verify_email_url":"https://synapsediscovery.io/mcp/verify"},"rest_api":"https://synapsediscovery.io/api/v1","tool_count":26}