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Directory / Before the Lot
Before the Lot
by beforethelot.com · https://beforethelot.com/mcp
Car-buying math and state rules: out-the-door prices, quote checks, leases and trade-ins
12 of 12 checks · 28 Oct 2026
Is Before the Lot MCP server safe?
- No hidden instructions were found in its tool descriptions.
- Its error messages showed no secrets or internal details.
- All 16 of its tools are labeled read-only.
- Overall it scored 89/100 on 28 Oct 2026.
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What it can do
16 tools, in the server's own words.
what_can_i_affordread-onlyWorks out the budget ceiling from a monthly payment: the most that can be financed, the highest out-the-door price after the trade-in tax credit, that ceiling …
out_the_doorread-onlyItemizes an out-the-door estimate for a vehicle price: rebates, doc fee, add-ons, the state's sales tax (with its rules on rebates and caps), title and registr…
check_quoteread-onlyReads a dealer's out-the-door quote, pasted as text (up to 8 KB) or given as line items, and checks it line by line: the out-the-door total, the doc fee agains…
compare_quotesread-onlyRanks two to ten itemized dealer quotes by out-the-door price, with each one's gap to the lowest and to the walk line, and (with a state) each doc fee against …
rebate_vs_aprread-onlyCompares a maker's cash rebate taken with the person's own loan against the maker's special APR (with any cash that combines with it): each side's payment, int…
loan_paymentread-onlyThe monthly payment, total interest and total paid on a car loan, with what a term over 60 months adds in interest compared with 60.
lease_checkread-onlyWorks a lease quote from MSRP, selling price, residual and money factor (or the lease's APR): the depreciation and rent charges, the payment with tax (and a st…
refinance_checkread-onlyCompares a car loan as it stands with a new loan at a quoted rate, by default over the same months left so a lower payment cannot hide a longer loan, with any …
trade_in_positionread-onlyFrom written trade-in offers and the payoff: the best offer still open (the floor a dealer's trade number is compared with), the equity or negative equity, and…
payoff_planread-onlyA payoff plan for a car loan, for paying it off early with an extra payment each month: the months and total interest at the regular payment, and with an extra…
get_methodread-onlyThe Before the Lot method: an overview and its seven stages (what to collect, what each produces, which guides, tools and email templates apply, and when the s…
state_rulesread-onlyA state's rules on dealer doc fees, sales tax (state rate, local add-on range, cap), trade-in tax credit, how a maker's rebate is taxed, and cancellation right…
dealer_emailread-onlyFills one of the six Before the Lot email templates (request a quote, make an offer, a competing quote, confirm the deal, decline, tell a lender) with the deta…
offers_pageread-onlyWhere a maker lists its own current offers (and a model's own page where one can be built), with whether the maker lists national offers at all.
desk_scriptread-onlyThe Before the Lot line for a moment at the desk.
plan_linkread-onlyBuilds a Before the Lot planner link that opens with the numbers given already filled in.
Test results
Safe mode: only tools labeled read-only were run. How the test works
- !Every tool is describednote
3 warnings
- !what_can_i_afford: Inputs with no description: condition
- !rebate_vs_apr: Inputs with no description: tax_rate
- !dealer_email: Inputs with no description: details
- !Resources and prompts worknote
3 warnings (24 resources, 4 prompts)
- !plan-car-purchase: Inputs with no description: new_or_used, budget
- !plan-car-purchase: Could not open it with sample inputs: Invalid arguments for prompt plan-car-purchase: state: Use the two-letter state code, like PA, new_or_used: Invalid option: expected one of…
- !review-dealer-quote: Could not open it with sample inputs: Invalid arguments for prompt review-dealer-quote: state: Use the two-letter state code, like PA
- and 3 more
- ✓ConnectsConnected in 575 mspass
- ✓Ready for the newest MCP versionUses the latest MCP version (2026-07-28)pass
- ✓Lists its toolsFound 16 toolspass
- ✓Tools are labeled safe or dangerousEvery tool has a safety labelpass
- ✓No hidden instructionsNo hidden instructions found in tool descriptionspass
- ✓Tools work with good inputspass
All good
- ✓what_can_i_afford: Worked (74 ms)
- ✓check_quote: Answered with an error, probably because of our sample input: Send the quote as text or as lines, one or the other.
- ✓compare_quotes: Answered with an error, probably because of our sample input: Input validation error: Invalid arguments for tool compare_quotes: quotes: Too small: expected array to have >=2 items
- ✓rebate_vs_apr: Answered with an error, probably because of our sample input: Give the amount financed before the rebate, or a vehicle price, one or the other.
- ✓refinance_check: Answered with an error, probably because of our sample input: Those numbers can't be worked out: term must be a number from 1 to 120; got 0.
- ✓trade_in_position: Worked (28 ms)
- ✓payoff_plan: Answered with an error, probably because of our sample input: Give the months left or the regular payment, one or the other.
- ✓get_method: Worked (28 ms)
- and 8 more
- ✓Bad inputs give a clean errorpass
All good
- ✓what_can_i_afford: Refused missing required input "max_payment" with a clear error
- ✓what_can_i_afford: Refused wrong type for "max_payment" with a clear error
- ✓check_quote: Refused missing required input "state" with a clear error
- ✓check_quote: Refused wrong type for "state" with a clear error
- ✓compare_quotes: Refused missing required input "quotes" with a clear error
- ✓compare_quotes: Refused wrong type for "quotes" with a clear error
- ✓rebate_vs_apr: Refused missing required input "rebate" with a clear error
- ✓rebate_vs_apr: Refused wrong type for "rebate" with a clear error
- and 17 more
- ✓Fast enoughpass
All good
- ✓Connecting took 575 ms
- ✓Listing tools took 519 ms
- ✓Average tool answer: 42 ms
- ✓what_can_i_afford: Slowest tool: what_can_i_afford (74 ms)
- ✓No secrets leakedChecked 32 error messages: no secrets or internal detailspass
- ✓Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guidepass
- –Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)not tested
Test it yourself
Free and open source. Same checks, same score.
npx qamcp-cli https://beforethelot.com/mcpShow this score on GitHub
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[](https://qamcp.dev/s/com-beforethelot-before-the-lot.html)Score over time
- 28 Oct 202689
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use Before the Lot, signed in with GitHub, one per person. Reviews never change the score.
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