Life
Aster Tools
From age, loan, and tax calculators to unit conversion and writing helpers — a free toolkit for the small chores of work and daily life. No sign-up, multilingual.
Tools
Simple tools that make daily work a little lighter.
Browse the tools from Aster Works—simple companions that make work, learning, and daily life a little lighter, released a few at a time.
3 tools (including upcoming)
Work Coming Soon
Synaxis
A multi-tenant SaaS for churches that simply manages worship attendance and lunch sign-ups.
Coming soon
Work Coming Soon
Keryx
A Japanese-first workspace for pastors that brings sermon planning, service preparation, and reflection together in one place.
Coming soon
For Developers
Developer tools
Real, usable tools published for indie developers and Claude Code users.
Dev tool Live npm
Aster Guard
Check safety at a glance, before you connect.
A lightweight security scanner that checks MCP servers and .mcp.json before you connect them — built for Claude Code users and indie AI developers.
$ npx @asterworks/aster-guard scan - Detects 11 risk types via static analysis (prompt injection, secrets, dangerous installs, and more)
- Reports a risk score (0–100) and grade (A–F) in a Japanese or English report
- Runs fully local with no external transmission; read-only by default for safety
- Works as an MCP server callable from Claude Code, and in GitHub Actions