Exact arithmetic engine for AI agents. 62 tools across 22 domains — integer math, fractions, calculus, unit conversion, finance, statistics, chemistry, physics, and more. Every result is deterministic and verifiable. No floating-point drift, no hallucinated answers. One tool call replaces multi-step chain-of-thought reasoning. Free tier available at arithym.xyz.
Not monetized yet
Turn Arithym’s tool calls into revenue: one disclosed sponsored slot, 70% revenue share, fail-open by design.
Install Arithym
For anyone using Arithym — no Lulu account neededclaude mcp add --transport http arithym https://arithym--arithym.run.tools
Real-time weather for any city, built on the lulu-ads widget gallery. First-party, free forever.
View server →FAQ
Run: claude mcp add --transport http arithym https://arithym--arithym.run.tools
Yes — it’s a remote MCP server, so no local install is needed.
ChatGPT: Settings → Connectors → Advanced → Developer mode → Add connector, then paste https://arithym--arithym.run.tools.
Claude.ai: Settings → Connectors → Add custom connector, then paste the same URL.
Unrated out of 100, computed from cross-registry traction signals (installs, stars, registry presence) — never influenced by sponsorship.
Similar servers
Works well together