Arithym

A precision math server that routes calculations through 203 exact methods to eliminate floating point errors and hallucinated results. Reach for this when you need Claude to handle financial calculations, scientific computing, or any scenario where approximate arithmetic isn't acceptable. Runs over streamable HTTP, so it works with remote Claude deployments without local setup. The core value is simple: instead of letting the model approximate math, you're delegating to a deterministic engine that returns provably correct results. Good fit for accounting tools, engineering applications, or anywhere numerical precision matters more than speed.