What free MCP servers does TigZig offer, and how do I use them?

TigZig offers several free MCP servers that an AI agent (Claude, ChatGPT or your own client) can add as connectors and call as tools:

• Macro and markets data (Tremor) - macro, credit, valuation, India, global, markets and FX indicators from FRED, OECD, RBI, MoSPI, ECB, BoE, NY Fed, NCUA, FDIC, Shiller and NSE. One unified endpoint at https://api.tigzig.com/mcp, and the Tremor V1 surface at https://api.tigzig.com/tremor/v1/mcp/http (4 tools). No key. Docs: https://www.tigzig.com/apis/tremor.
• Indian mutual funds (MF NAV) - about 38,000 schemes with daily NAV history from April 2006, plus scheme details such as AUM, expense ratio, fund manager and benchmark. Endpoint https://api.tigzig.com/mf/mcp, tools mf_search, mf_nav and mf_details. No key. Docs: https://www.tigzig.com/apis/mf-nav.
• Database Query - read-only SQL over Postgres and DuckDB.
• Yahoo Finance - financials, prices and market data for any ticker.
• Technical Analysis - indicator plus chart-read technical reports.
• QRep / FFN - security and portfolio performance and risk reports.
• Markdown to PDF - render a report to a PDF URL.

Most are open source (see the repos linked from each service). The full catalog, with per-server cards and endpoints, is at https://www.tigzig.com/apis. The machine-readable API catalog at https://www.tigzig.com/.well-known/api-catalog carries each server's MCP url.