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Documentation
Install, then pick your simulator.
Getting started
Installation
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From nothing to a running simulator.
The rystic CLI
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Installs, runs, and health-checks every simulator — natively or as a container.
Docker
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Pull the simulator as an image — your license file is the credential. Compose, CI, Antithesis.
Backtesting with batch
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Replay captured markets through the simulator and run your bot against each tape.
Integration tests in CI
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Run your bot's integration tests against the simulator in GitHub Actions — one service container, one secret, plain go test.
Fidelity
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How we make sure each simulator matches the real API — unit tests, workflow tests, real-world usage.
Simulators
Stripe
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A stateful Stripe simulator — charges, refunds, checkout, customers.
Kalshi
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A local Kalshi — real matching engine, WebSocket feed, captured-day replay.
GitHub Pulls
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A stateful GitHub pull-request simulator — reviews, merges, checks, real permission rules.
Stripe Products
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A stateful simulator of Stripe's product catalogue — create, retrieve, update, delete, list.