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Directory / CommercialBuses
CommercialBuses
by commercialbuses.com · https://commercialbuses.com/api/mcp
Used buses for sale, skoolie auctions, bus prices, CDL rules and board proposals. Free.
12 of 12 checks · 1 Nov 2026
Is CommercialBuses MCP server safe?
- None of the hidden-instruction wordings we know were found in its tool descriptions.
- Its error messages showed no secrets or internal details.
- 11 of its 12 tools are labeled read-only; the others may change or send things.
- Overall it scored 70/100 on 1 Nov 2026.
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What it can do
12 tools, in the server's own words.
search_busesread-onlySearch the commercial buses currently listed for sale by participating dealers.
get_busread-onlyOne listed bus in full public detail, by its listing URL or slug, plus how to ask about it.
request_busSend a buyer's bus requirements to a CommercialBuses person, who searches participating dealer inventory and replies by email.
find_skoolie_busread-onlyFind a bus to convert into a skoolie (a school bus or shuttle turned into a camper or tiny home).
check_cdl_requirementread-onlyWhether a bus needs a commercial driver's license under US federal rules, which class (B or C), and which endorsements (passenger, school bus), from the passen…
get_used_bus_pricesread-onlyMedian asking prices and mileage for used buses by model year, measured from current dealer listings on CommercialBuses, with the listing and dealer count behi…
draft_board_proposalread-onlyWrite a bus purchase proposal for a church, school, camp or senior living board: the need, the bus, why not a 15-passenger van, the driver and license plan, a …
compare_own_vs_outsourceread-onlyYearly cost of owning a bus against charter, a contracted shuttle or rideshare, using only figures the caller supplies.
check_vehicle_rulesread-onlyThe US federal rules and published guidance that apply to a church, school, camp, senior living community, medical transport (NEMT) operator or hotel buying a …
list_bus_categoriesread-onlyThe commercial bus categories, each with what it actually is, typical passenger capacity, what operators use it for, and whether it needs a CDL endorsement.
get_bus_categoryread-onlyOne bus category in full, by slug, including the related categories worth considering instead.
get_buying_contextread-onlyHow sourcing works here, what capacity bands and fuel types mean in practice, and what the service does and does not do.
Test results
Safe mode: only tools labeled read-only were run. How the test works
- ✕Tools work with good inputsfail
1 failed
- ✕find_skoolie_bus: No answer within the time limit
- –request_bus: Not run: labeled as changing data
- and 10 more
- !Ready for the newest MCP versionnote
1 warning
- !Uses an older MCP version (2025-06-18). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
- !Every tool is describednote
5 warnings
- !search_buses: Inputs with no description: condition
- !request_bus: Inputs with no description: buyer_name, buyer_email, buyer_phone, min_seats, condition, budget_max_usd, wheelchair_lift
- !draft_board_proposal: Inputs with no description: organization, organization_type, passengers, wheelchair_lift, price_usd, miles_per_year, mpg, fuel_price_per_gallon, insurance_per_year_usd, maintenance_per_year_usd
- !compare_own_vs_outsource: Inputs with no description: trips_per_year, bus_price_usd, years_kept, resale_usd, insurance_per_year_usd, maintenance_per_year_usd, miles_per_year, mpg, fuel_price_per_gallon, driver_hours_per_year, driver_pay_per_hour_usd
- !check_vehicle_rules: Inputs with no description: organization_type, carries_students
- !Bad inputs give a clean errornote
14 warnings
- !search_buses: Accepted wrong type for "bus_type" without complaining
- !get_bus: Accepted missing required input "listing" without complaining
- !get_bus: Accepted wrong type for "listing" without complaining
- !find_skoolie_bus: Accepted wrong type for "zip" without complaining
- !check_cdl_requirement: Accepted missing required input "passengers" without complaining
- !check_cdl_requirement: Accepted wrong type for "passengers" without complaining
- !get_used_bus_prices: Accepted wrong type for "bus_type" without complaining
- !draft_board_proposal: Accepted missing required input "organization_type" without complaining
- and 6 more
- !Follows MCP best practices (not scored yet)note
1 tip (not scored)
- !10 tools answer with structured data but don't declare its shape (outputSchema): search_buses, get_bus, check_cdl_requirement, get_used_bus_prices, draft_board_proposal, compare_own_vs_outsource and 4 more. If those answers change shape, no
- ✓ConnectsConnected in 512 mspass
- ✓Lists its toolsFound 12 toolspass
- ✓Tools are labeled safe or dangerousEvery tool has a safety labelpass
- ✓No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.pass
- ✓Tools work togetherlist_bus_categories → get_bus_category: get_bus_category found what list_bus_categories returned (slug = "school-bus")pass
- ✓Fast enoughpass
All good
- ✓Connecting took 512 ms
- ✓Listing tools took 108 ms
- ✓Average tool answer: 113 ms
- ✓search_buses: Slowest tool: search_buses (210 ms)
- ✓No secrets leakedChecked 1 error messages: no secrets or internal detailspass
Test it yourself
Free and open source. Same checks, same score.
npx qamcp-cli https://commercialbuses.com/api/mcpShow this score on GitHub
Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.
[](https://qamcp.dev/s/com-commercialbuses-commercialbuses.html)Score over time
- 1 Nov 202670
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use CommercialBuses, signed in with GitHub, one per person. Reviews never change the score.
QAmcp Monitor (coming soon) tests it every hour and emails you when it goes down, the score drops, a tool changes or a secret leaks. You'll also be able to claim this page and get a verified owner mark. Founding price: $19/month for life for the first 50 teams.
Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works