Arthr
Australian home loan repayments, borrowing power, refinancing and stamp duty calculator.
Connects to Australian home lending data. Estimates monthly repayments and total interest, calculates borrowing power based on income and expenses, compares refinancing savings, checks real serviceability across lender panels, and estimates stamp duty by state.
Try asking Muse: "How much could I borrow for a home loan based on my household income and expenses?"
Source: Found in the official MCP Registry (au.com.arthr/mcp) · First listed September 24, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 7 min ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
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How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://www.arthr.com.au/api/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 1216ms. Worked in 100% of checks over 30 days.
Screening · September 24, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 8
estimate_repaymentsEstimate the monthly repayment, total repaid and total interest on an Australian principal-and-interest home loan. Use this when someone asks what a loan would cost them each month, or how much interest they'd pay over the life of a loan.estimate_borrowing_powerEstimate how much someone could borrow for an Australian home loan, based on household income, living expenses, credit card limits and existing debt repayments. Applies Australian resident income tax and the 3-percentage-point serviceability buffer lenders assess against (APRA guestimate_refinance_savingsCompare an existing home loan rate against a lower one and estimate the monthly and whole-of-term saving. Use this when someone asks whether refinancing is worth it, or what dropping their rate would save them. Both rates are arguments — this tool does not quote or assume a markeestimate_refinance_break_evenWork out how many months it takes for a refinance to pay for itself once switching costs are counted, and what the net saving is after them. Call this rather than estimate_refinance_savings when someone is deciding whether a switch is worth doing, not just how much a lower rate sestimate_equity_and_lvrWork out loan-to-value ratio, equity, and — the part that matters — how much of that equity is actually usable. Value minus balance is not what a borrower can borrow: lenders generally release to 80% of the property's value, so the usable figure is often far smaller than the raw estimate_stamp_dutyEstimate stamp (transfer) duty on an Australian residential property purchase, for any state or territory, including first-home and owner-occupier concessions. Duty scales differ in every jurisdiction and change at each state budget, so this is the tool to call rather than workinlookup_discharge_processLook up how to discharge a mortgage with a specific Australian lender — the name of the form, a link to it on the lender's own site, where the completed form is submitted, the lender-stated processing time, the discharge fee where the lender publishes one, and the phone number. Tcheck_servicingRun a REAL serviceability calculation across a panel of Australian lenders and get back, per lender, how much they would lend, whether they would lend at all, the rate they'd assess at, and — where they decline — why. This is not an estimate: it is the same calculation a broker rRecent checks
Link
https://www.arthr.com.au/api/mcpQuestions about Arthr in Muse
How do I connect Arthr to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Arthr to help me. It is a free service with an MCP server at https://www.arthr.com.au/api/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Arthr working right now?
At the last check (September 28, 2026, 09:00 UTC) the endpoint was working, answering in 1216ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Arthr safe to connect to Muse?
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can Arthr do in Muse?
It exposes 8 tools, including estimate_repayments, estimate_borrowing_power, estimate_refinance_savings, estimate_refinance_break_even. For example, you could ask Muse: "How much could I borrow for a home loan based on my household income and expenses?"
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