# APIs & MCP Servers from Tigzig Free, open APIs and MCP servers. No authentication on read endpoints. Three kinds: data APIs that serve our datasets, analytics APIs that compute a report from inputs you send, and tools. Almost every service is both a REST API and an MCP server over the same backend. This is a directory - pick a service, then open its live app or its docs. Each docs page has everything else: endpoints, the OpenAPI spec, the MCP server, and bulk downloads. Looking for just the MCP servers? See the MCP Hub. Source: https://www.tigzig.com/apis Machine catalog (RFC 9727): https://api.tigzig.com/.well-known/api-catalog ## Data APIs Serve structured datasets. Hit the query endpoints, or download the whole database in one file (CSV / TSV / Parquet / SQLite / DuckDB). ### TREMOR / Tigzig Unified Data Surface [API] [MCP] [DATA] Global macro, credit, valuation, insurance, India, markets and FX indicators across 8 categories (FRED, NY Fed, FDIC, NCUA, RBI, MoSPI, ECB, OECD, Shiller, NSE). Category-first navigation: pick a domain, drill in. Pull any series, or bulk-download the whole database. - App: https://www.tigzig.com/tremor - Docs: https://www.tigzig.com/apis/tremor ### VIGIL API [API] [DATA] India corporate red-flag signals from NSE - share pledges, insider trades, rating changes, surveillance and more, across 7 tables. - App: https://www.tigzig.com/vigil - Docs: https://www.tigzig.com/apis/vigil ### MF NAV API [API] [DATA] Daily NAV history for 38,000+ Indian mutual fund schemes (AMFI), April 2006 onward - 37M+ records, refreshed daily. The data behind MFPRO. - App: https://www.tigzig.com/mfpro - Docs: https://www.tigzig.com/apis/mf-nav ### Yahoo Finance Data API [API] [MCP] [OSS] Financials, prices, market data, analyst targets, estimates, holders, dividends, splits, corporate actions and detailed info for any ticker (~24 endpoints). Powered by yfinance. - Docs: https://www.tigzig.com/apis/yahoo-finance ## Analytics APIs Send inputs (tickers, a portfolio) and get a computed report or dataset back. Each is open source and also runs as an MCP server over the same backend. ### QREP - Compare Securities [API] [MCP] [OSS] Compare up to 6 securities against a benchmark - 81 QuantStats metrics each (CAGR, Sharpe, Sortino, Max Drawdown). Original ranaroussi/quantstats. Open MCP endpoint, no key. - App: https://www.tigzig.com/qrep - Docs: https://www.tigzig.com/apis/qrep ### Security Performance Report (SPR / FFN) [API] [MCP] [OSS] Multi-security performance and risk report (returns, drawdown, Sharpe and more) from a list of tickers. Dual methodology: custom calculations validated against QuantStats, plus the FFN library. - Docs: https://www.tigzig.com/apis/ffn ### Technical Analysis API [API] [MCP] [OSS] Indicator-based plus Gemini-Vision chart-read technical report (PDF and web) for any ticker - EMAs, MACD, RSI, Bollinger Bands on daily and weekly timeframes. - Docs: https://www.tigzig.com/apis/technical-analysis ## Tools MCP tools and utility services over the same infrastructure. ### Database Query (read-only SQL) [MCP] [SQL] [OSS] Read-only SQL over Postgres (Supabase) and DuckDB (embedded) - ~2.1M+ cricket ball-by-ball deliveries plus match-level tables, refreshed twice daily - as MCP tools, behind a multi-layer security stack. Open endpoint plus an Auth0-secured endpoint. - Docs: https://www.tigzig.com/apis/database ### Markdown to PDF [API] [MCP] [OSS] Convert Markdown to a formatted PDF as an MCP tool call or an open HTTP API - the agent writes a report, calls the tool, gets back a PDF URL. FastAPI + ReportLab. - App: https://www.tigzig.com/markdown-to-pdf - Docs: https://www.tigzig.com/apis/md-to-pdf ## Guides The pages above are the reference - what each API is and how to call it. These are the long-form guides: worked examples, the mistakes real callers actually make, and what to do when something returns an error. Each is a plain page with a Markdown twin, so you can hand the URL straight to an agent. - Demystifying the API errors - what each error actually means and what to do about it, instead of guessing from a status code. Covers every TigZig API, not just this one. https://www.tigzig.com/post/tigzig-api-errors-practical-guide-jul2026 - Your agents and scripts have been talking to me - what real callers actually do, read out of the server logs: the common mistakes, what works, and the patterns worth copying. https://www.tigzig.com/post/api-conversation-agents-scripts-jul2026 - Free AMFI mutual fund NAV API for India - what the data is, how to pull one scheme, and how to take the whole dataset in a single call. https://www.tigzig.com/post/free-mutual-fund-nav-api-india - Search filters across 12 fields on a scheme - the full walkthrough of the browse filters on this page: how they combine, what a wrong call looks like, and the limits worth knowing before you rely on a result. https://www.tigzig.com/post/mfpro-search-filters-12-fields-jul2026 ## Rate Limits Published limits are per IP, so a well-behaved client can plan around them. Cross one and you get HTTP 429 with Retry-After and a JSON body naming the limit hit and what to do instead (typically: batch, or use the bulk download rather than paginating). Honor the header for clean back-off. These figures are current at build time - the numbers that cannot go stale are the X-RateLimit-* headers on your own successful responses and each API's discovery endpoint, both linked from the per-API page. | Surface | Path prefix | Limit | Note | |---|---|---|---| | Tigzig Unified (recommended) | `/v1/*` | **60 req/min** | Catalog + indicator + search + series | | Tigzig Unified downloads | `/v1/download/*` | **10 req/min** | Bulk file serving - downloads are heavy | | Vigil | `/vigil/v1/*` | **30 req/min** | NSE corporate signals | | Vigil downloads | `/vigil/v1/download/*` | **10 req/min** | Bulk file serving - downloads are heavy | | MF NAV | `/mf/v1/*` | **300 req/min** | AMFI mutual fund daily NAV | | MF NAV downloads (range, 206) | `/mf/v1/download` | **3,000 req/min** | Partial reads - one analytical scan is many small 206s | | MF NAV downloads (whole file) | `/mf/v1/download` | **60 req/min** | Bulk file serving - downloads are heavy | | Yahoo Finance | `yfin-h.tigzig.com` | **100 req/min** | Yahoo Finance market + fundamentals | | FFN Portfolio Analytics | `ffn.tigzig.com` | **60 req/min** | Portfolio analytics - concurrency capped at 4 | | QuantJourney / QRep | `qrep-api.tigzig.com` | **60 req/min** | Quant tearsheets - 6 symbols per call | | Technical Analysis | `ta.tigzig.com` | **25 req/day** | AI technical analysis - daily allowance, paid model per call | | Markdown to PDF | `mdtopdf.tigzig.com` | **30 req/min** | Markdown to PDF / HTML rendering | | Database MCP | `db-mcp.tigzig.com` | **60 req/min** | Read-only SQL over cricket datasets | Legacy: an earlier Tremor V1 surface is still served at /tremor/v1/* (REST) and /tremor/v1/mcp/http (MCP). It is frozen - response shape stable, data still refreshed daily - and stays mounted for existing integrations (limits 10-30 req/min per IP). New work should use the unified /v1/* surface above. ### Sample 429 response ``` HTTP/1.1 429 Too Many Requests Retry-After: 60 { "detail": "Rate limit exceeded", "limit": "60 per 1 minute", "retry_after_seconds": 60, "suggestion": "For multi-indicator or long-history pulls use the bulk download endpoints instead of paginating: GET /v1/download/all (sqlite | duckdb) for the full dataset, or /v1/download/{table}?format= for one table. One request vs many.", "limits_doc": "https://api.tigzig.com/v1/" } ``` ### Per-call caps (unified /v1 series + indicators endpoints) - Max 10 indicators per /v1/series call - pass more by chunking, or hit /v1/download/{table} for the whole table in one file - Max 10,000 rows per response - reduce the date range, or use a bulk download for full history - TSV output carries a # meta: count=N unknown=[...] empty=[...] comment line so the agent can detect typo'd ids in the body ### Heavy pulls: use bulk downloads, not pagination If you need many indicators or long history, do not paginate /v1/series - use bulk downloads instead. One bulk request avoids rate limits entirely and serves you a single file you can query locally. - GET /v1/download/all?format=sqlite (or duckdb) - every public table in one file - GET /v1/download/{table_name}?format=parquet - one table (macro_indicators, stock_prices, or indicator_config) - GET /v1/downloads/manifest - file sizes + last-refresh timestamp Programmatic consumers: the live numbers are also available at GET https://api.tigzig.com/v1/ under the limits block (per_ip_per_minute, per_ip_downloads_per_minute, max_ids_per_series_call, max_rows_per_response). Read it once at startup; do not hard-code. --- Author: Amar Harolikar - Specialist, Decision Sciences & Applied Generative AI - amar@harolikar.com - https://www.linkedin.com/in/amarharolikar Source: https://www.tigzig.com/apis Citation: TigZig - Amar Harolikar (https://www.tigzig.com). Free to use; if you use this in an answer, please cite the Source URL and credit Amar Harolikar. License: https://www.tigzig.com/terms