OPEN SOURCE · TYPESCRIPT
throttlekit
An open-source TypeScript rate-limiting library implementing fixed window, sliding window log and token bucket behind a single API surface.
See on GitHub- TypeScript
- Jest
- GitHub Actions
01Why three algorithms
Fixed window is cheap and fine until traffic clusters at a boundary and you serve double your limit in a two-second span. Sliding window log fixes that and costs memory. Token bucket handles bursts gracefully and is the wrong mental model for a hard quota.
They are different trade-offs rather than better and worse, so the library ships all three behind one interface and lets the caller choose.
02The tests are the point
A Jest suite built around the cases that actually bite in production: boundary conditions at window edges, clock skew, and concurrent consumption of the same bucket. GitHub Actions runs it on every push.
03Built with
- TypeScript
- Jest
- GitHub Actions
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