Two open-source security projects and three calculators, all live. On the calculators, move a slider for a quick answer, then open the full calculator with your number already filled in.
A self-hosted security testing platform for web apps, APIs, AI systems and connected devices, with a web UI, REST API and CLI. It can be driven in plain English by your own AI coding agent.
curl -fsSL https://install.shakerscan.com | sh
An interactive course on everyday cybersecurity for people who are not specialists: hands-on checks and quizzes instead of slides.
Take-home pay for every US state and Canadian province (2025), and what the same life costs across the border.
Payment, PMI or CMHC, minimum down payment and itemized cash to close, for every state and province.
Nest egg, the income it can pay and the gap to close, in today's dollars or future ones.
Numbers you type stay in your browser. A prefilled link carries them in the address, and the page removes them from it once the form is filled. Estimates only, not financial or tax advice.
Every calculator is also an MCP tool (mortgage, tax, US vs Canada, retirement, current rates). Connect Claude Code:
claude mcp add --transport http a3sec https://www.a3sec.net/mcp