Search US and UK car listings, predict prices, decode VINs, and view market history.
Connects to MarketCheck automotive data to search active and sold car listings in US, Canada, and UK markets. Muse can help you find vehicles by specs and location, predict fair prices with comparable listings, decode VIN details, and track a car's online listing history.
Try asking Muse: "Find used Honda Civics under $20,000 within 50 miles of my zip code and show me what similar cars are selling for."
Source: Found in the official MCP Registry (com.marketcheck/api) · First listed September 24, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 6 h ago.
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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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://developers.marketcheck.com/api/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
MarketCheck API is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://developers.marketcheck.com/api/mcpResponse time at the last check: 274ms. Worked in 99.1% of checks over 30 days.
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.
search_active_carsSearch for cars in the United States and Canada market with comprehensive filters. This endpoint allows searching market vehicles that are up for sale in US and Canadian market right now. This endpoint serves only dealer listings. Carfax fields: `carfax_1_owner`, `carfax_clean_tisearch_past_90_daysSearch for recent car inventory (EXPIRED/SOLD listings from last 90 days) with comprehensive filters following Marketcheck API structure. Scope: this endpoint serves only expired/sold listings from the last 90 days for US and CA (Canada) markets, not active listings. For currentlpredict_price_with_comparablesPredict car price along with comparable vehicles in the market. This provides predicted price, MSRP along with active set comparables to help understand market positioning and competitive pricing.get_car_historyGet a car's online listing history by VIN. The history API returns online listing history for a car identified by its VIN. History listings are sorted in the descending order of the listing date / last seen date.decode_vin_neovinGet vehicle specifications from NeoVIN decoder by VIN. Get the basic information on specifications for a car identified by a valid VIN from NeoVIN decoder. This provides detailed vehicle specifications including trim, engine, transmission, features, options and MSRP information.get_server_infoGet information about the server. Returns: Server capabilities as a dict (serialized by the transport layer)search_uk_active_carsSearch for active cars in the UK market. This tool searches for currently active car listings in the UK using the Marketcheck API. It supports comprehensive filtering by location, vehicle specifications, price, and more. Includes all parameters supported by the /search/car/uk/actsearch_uk_recent_carsSearch for recent/expired cars in the UK market (last 90 days). This tool searches recent inventory data for expired/sold listings only. It does not include active listings - use search_uk_active_cars for current inventory. Carfax fields: `carfax_1_owner`, `carfax_clean_title` anget_sold_summaryMonthly sold-vehicle statistics for US franchise and independent dealers: how many sold, at what advertised prices, how fast, where, ranked however you ask. A "sale" is inferred (a listing left a dealer site and met MarketCheck's sold rules); prices are advertised asking prices, search_oem_incentivesSearch for OEM (manufacturer) incentive offers across all brands. Searches for rebates, financing deals, and lease specials with 50+ filter parameters. Use this when searching across multiple OEMs or doing broad searches.search_oem_incentives_by_zipSearch for incentives from a specific manufacturer in a location. Optimized for finding all available incentives from a specific OEM in a geographic area. Automatically converts ZIP to MSA code for regional relevance. Use this when you know both the manufacturer and location.search_dealershipsSearch the MarketCheck dealership directory (current, multi-rooftop, group-aware). Use this for "who/where is the dealer?" lookups. For inventory, use search_active_cars. Recommended over search_dealers unless legacy `dealer_id`-style results are needed. This is also the lookup fsearch_dealersSearch the legacy MarketCheck dealer directory (one-website-per-dealer model). search_dealerships is recommended for new use cases. This endpoint is being phased out; use it only when you specifically need legacy `dealer_id`-style records or the `listing_count_range` inventory-sihttps://developers.marketcheck.com/api/mcpNot in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use MarketCheck API to help me. It is a free service with an MCP server at https://developers.marketcheck.com/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.
At the last check (November 13, 2026, 08:31 UTC) the endpoint was working, answering in 274ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
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.
It exposes 13 tools, including search_active_cars, search_past_90_days, predict_price_with_comparables, get_car_history. For example, you could ask Muse: "Find used Honda Civics under $20,000 within 50 miles of my zip code and show me what similar cars are selling for."
This listing was added from public sources (Found in the official MCP Registry (com.marketcheck/api)). If you build MarketCheck API, claim it to correct the details and get your badge.
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