Last reviewed: July 20, 2026
What is the HomeCalc connector?
The HomeCalc Connector is a free Model Context Protocol (MCP) server that lets AI assistants like Claude and ChatGPT run HomeCalc.ca's Canadian mortgage, tax, and land-transfer calculators directly inside a conversation. It uses the exact same verified math as the website, is read-only, requires no account, and collects no personal data.
The connector in one paragraph
The HomeCalc Connector is a free Model Context Protocol (MCP) server that lets AI assistants like Claude and ChatGPT run HomeCalc.ca's Canadian mortgage, tax, and land-transfer calculators directly inside a conversation. It uses the exact same verified math as the website, is read-only, requires no account, and collects no personal data.
What it does
Ask a question like “What’s the minimum down payment on an $850,000 home in Canada?” or “Land transfer tax on a $1.2M Toronto purchase” and the assistant calls the matching HomeCalc calculator and answers with the real number — plus a link back to the tool on this site. These are the tools available today:
| Tool | What it calculates |
|---|---|
| Mortgage payment | Monthly or biweekly payment from price, down payment, rate, and amortization. |
| Minimum down payment | Minimum down payment and CMHC insurance eligibility under the Dec 2024 rules. |
| Land transfer tax | Provincial LTT, Toronto MLTT, and first-time-buyer rebates (ON / Toronto / BC / MB). |
| Income tax | Federal and provincial income tax, CPP/EI, and take-home pay by province. |
| Mortgage penalty | Prepayment penalty — IRD vs three-month-interest methods. |
| BC home flipping tax | British Columbia anti-flipping tax by number of days the property was held. |
| Rent increase | Provincial rent-increase cap compliance (Ontario / British Columbia). |
More calculators — capital gains, HELOC, affordability, cap rate, and house flipping — are being added on the same server.
Add it to Claude
The connector is a remote MCP server. To use it in Claude:
- Open Settings → Connectors and choose Add custom connector.
- Paste the server URL:
https://canada-home-helper-production.up.railway.app/mcp - Leave authentication set to None — no login is required.
- Start a new chat and ask a Canadian mortgage, tax, or land-transfer-tax question. The assistant will call the relevant HomeCalc tool automatically.
A full list of HomeCalc calculators is always available on the website, and every connector result links back to the matching tool page.
Privacy & safety
- Read-only. Every tool only computes and returns a number — nothing is created, changed, or deleted.
- No account, no data collection. There is no sign-in, and the calculator inputs you provide are not stored or shared.
- Sourced & dated. Each result carries a link to the matching HomeCalc page and an estimate disclaimer.
- See our Privacy Policy and methodology for how the numbers are built and verified.
Who builds this
The connector is built and maintained by Hami Tahm, founder of HomeCalc.ca. It wraps the same unit-tested calculator cores that power the website, so a connector result can never drift from the tool on the site. Questions or issues? Email hami@homecalc.ca.
Frequently asked questions
Related: Embed our calculators · White-label calculators · Methodology