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Replay recorded executions alongside a trading journal

Browse crypto prices or use a public API without a developer key

Build event-driven market simulations with a shared strategy engine

Track crypto markets and build a portfolio from the quantities you hold

Free crypto market research with clearly separated API data licenses

Find economic time series by release, source or category

Replay historical markets across charts and depth-of-market views

Research options in a browser or build on licensed historical datasets

Retrieve current, forecast, and historical weather data in a single coordinate-based request.

Visualize the historical limit order book as a liquidity heatmap

Turn results from supported test frameworks into interactive reports with history, steps and failure context.

Collects and exposes resource-usage data for containers running on a host.

Compare strategy experiments across assets, parameters and historical periods

Research and backtest quantitative strategies in notebooks and code

A searchable reference to historical markers and memorials

Historical maps with text search and geographic viewing tools

Free public-domain artwork images from the National Gallery of Art

Free stock images with commercial-use and template guidance

Modern and contemporary art images with copyright-licensing support

Design, fashion and photography images with detailed object records

Italian newsreels and historical photographs with archive assistance

Documentary photography licensed through a professional archive

Swedish museum artwork images through several download routes

Compare DeFi protocols with defined metrics and historical data