StockMarketStack — a catalogue of stock market software & data

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StockMarketStack is a catalogue of software and data for people who managetheir own money: market data APIs, charting platforms and screeners, portfoliotrackers, backtesting frameworks, trade journals, MCP servers, time-seriesdatabases for tick data, and analysis libraries.Every tool gets the same blocks — price as a number, what the free tieractually allows, market and history coverage, data latency, interfaces,licence — across 12 categories, so the same question is answered in the sameplace on every card. Each block carries the date it was last checked againstthe vendor's own docs and pricing, and a field nobody verified is left blankrather than filled in with a plausible number.150 tools so far: 112 have a free tier, 40 ship an MCP server, 30 are opensource. Filter the whole catalogue in one flat list instead of reading tenlisticles, or slice it the other way — open source, self-hosted, real-time,spreadsheet add-ins.Long-form guides cover the part that decides whether a tool is usable at all:exchange data fees, security identifiers, index licensing, what is genuinelyfree. Plus "what to use instead" pages for products that shut down or changedtheir terms.