The unusual part is how much works with no account at all: screening, filings, option Greeks, max pain, ECB rates and sentiment all come from sources that need no key, and the three optional keys are free and only widen the surface. Two things to decide up front — whether to run with the workspace, since that is what makes watchlists and thesis notes persist locally, and how hard to lean on Alpha Vantage, whose free tier stops at 25 calls a day.
A market data server assembled from many free sources: TradingView screening, SEC EDGAR filings, Yahoo options, CBOE, CoinGecko, FRED, ECB rates and Reddit chatter, plus an optional workspace that remembers your watchlists and thesis notes between sessions.
- Screening with your own filters — price, RSI and the rest — plus today's gainers, losers, volume leaders, unusual-volume breakouts and a side-by-side comparison of named tickers
- Quotes on a 15-minute delay, technical indicators across timeframes, S&P 500 sector ETF performance, VIX and the major indices, and market breadth across NYSE, NASDAQ and AMEX
- Crypto with the same shape: pair screening, quotes, technicals and top gainers, plus CoinGecko coin detail, trending coins and global market cap and dominance
- SEC EDGAR: keyword search across filings, a company's recent filings, XBRL financials, insider trades from Forms 3, 4 and 5, 13F institutional positions, and 13D/13G ownership stakes above 5%
- Options: expirations, the full chain with Delta, Gamma, Theta and Vega, unusual volume against open interest, max pain, the implied move from the at-the-money straddle, and the CBOE put/call ratio
- Economic data from FRED by series id or keyword search, latest value or history, and the upcoming release calendar — FOMC, CPI, PPI, NFP, GDP, PCE, jobless claims, retail sales, ISM
- ECB daily reference rates across 31 currencies: latest, a past date, a range up to 90 days, and conversion between two of them
- Sentiment from three angles: CNN Fear and Greed, the Crypto Fear and Greed Index, and Reddit mention counts, trending tickers and per-ticker sentiment scanned across r/wallstreetbets, r/stocks and r/investing, including a batch pass over a whole watchlist
- With the workspace on: a saved trading profile, watchlists (up to 50) and a per-symbol investment thesis (up to 200) that survive between sessions
Nothing for most of it — the TradingView, EDGAR, options, CoinGecko, ECB, sentiment and Reddit modules need no account. Three free keys each switch on their own module: FINNHUB_API_KEY for real-time quotes, company news, the earnings calendar, analyst ratings and short interest; ALPHA_VANTAGE_API_KEY for daily price history, fundamentals and earnings and dividend history; FRED_API_KEY for economic indicators and the release calendar. Modules without their key are skipped rather than failing. It starts as npx -y stock-scanner-mcp, and --enable-workspace adds the stateful tools, which write to ~/.stock-scanner-mcp on your machine. Free-tier limits are worth planning around: Alpha Vantage allows 5 calls a minute and 25 a day, Finnhub 60 a minute. The same package also runs as an HTTP sidecar with an OpenAPI 3.1 spec for non-MCP clients.
One command — npx -y stock-scanner-mcp --enable-workspace