Arthr — Australian home loans

au.com.arthr/mcp

Real Australian lender serviceability, plus repayments, borrowing power and stamp duty.

Yes, your AI can use this right now.Answered a live MCP handshake in 829 ms with no sign-in needed and exposes 10 tools.

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URL: https://www.arthr.com.au/api/mcp

10 tools, verified live

Pulled straight from the server with tools/list on 2026-10-17.
estimate_repaymentsread-only

Estimate 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. Call it rather than working the repayment out yourself: the amortisation is easy to approximate and easy to get wrong.

estimate_borrowing_powerread-only

Estimate 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 guidance), over 30 years by default. Call it rather than applying an income multiple or your own serviceability sum: the b

estimate_refinance_savingsread-only

Compare 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. Call it rather than multiplying the balance by the rate gap: that shortcut ignores the principal in a P&I repayment and overstates the saving. Both rates are arguments — this tool does not

estimate_refinance_break_evenread-only

Work 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 saves. Call it rather than dividing the costs by the interest saved on the balance: that shortcut overstates the monthly

estimate_equity_and_lvrread-only

Work 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 one. Set situation="purchase" when the person does not own the property yet and loanBalance is the loan they would take

estimate_stamp_dutyread-only

Estimate 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 working duty out from memory.

lookup_discharge_processread-only

Look 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. This is the first step in refinancing away from a lender or selling. Every field is taken from the lender's own published

check_servicingread-only

Run 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 runs. Use it once you have income, monthly living costs and a property value; prefer estimate_borrowing_power before that

compare_ratesread-only

Lenders' advertised rates on arthr's panel for a loan of this size, at this loan-to-value band, purpose and repayment type, lowest first. Variable rates come with comparison rates where held; fixed terms of 1, 2, 3 or 5 years (principal and interest). Instant, from the panel's own tables, no account. Use it to show the spread of rates; check_servicing says who would actually lend.

find_productsread-only

Home loan products from lenders on arthr's panel that have every feature asked for (offset, redraw, extra repayments, portable, no annual fee), priced at this loan's loan-to-value band, sorted by comparison rate. Each comes with its fees in dollars. Facts in a stated order, not a recommendation. Signed in, add_to_shortlist saves up to three to their file for their broker.

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