Car Handshake
REMOTE · MCP.CARHANDSHAKE.COM · SCANNED OCT 2
Find and compare live vehicle inventory from participating US dealers and contact them with consent.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (schedule_test_drive). See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability79
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1875 tokens (~144/item across 13 items; 10 tools + 3 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage87
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 53% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
- Supports UI / widget rendering.Pass
How do I install the Car Handshake MCP server?
Car Handshake is a hosted endpoint at https://mcp.carhandshake.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · mcp.carhandshake.com
claude mcp add --transport http com-carhandshake-inventory 'https://mcp.carhandshake.com/mcp'
{
"mcpServers": {
"com-carhandshake-inventory": {
"url": "https://mcp.carhandshake.com/mcp"
}
}
} {
"servers": {
"com-carhandshake-inventory": {
"type": "http",
"url": "https://mcp.carhandshake.com/mcp"
}
}
} [mcp_servers.com-carhandshake-inventory] url = "https://mcp.carhandshake.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-carhandshake-inventory": {
"type": "remote",
"url": "https://mcp.carhandshake.com/mcp",
"enabled": true
}
}
} openclaw mcp add com-carhandshake-inventory --url 'https://mcp.carhandshake.com/mcp' --transport streamable-http
mcp_servers:
com-carhandshake-inventory:
url: "https://mcp.carhandshake.com/mcp" {
"McpServers": {
"com-carhandshake-inventory": {
"Transport": "http",
"Url": "https://mcp.carhandshake.com/mcp"
}
}
} assistant mcp add com-carhandshake-inventory -t streamable-http -u 'https://mcp.carhandshake.com/mcp'
{
"mcpServers": {
"com-carhandshake-inventory": {
"type": "http",
"url": "https://mcp.carhandshake.com/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 10 Sept 26 0
- Stability: 0.97 → pass security
- 9 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 6 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 4 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 19 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “find_dealerships” rewrote its description, which is the text the model reads security
- Tool “get_dealership” rewrote its description, which is the text the model reads security
- Tool “request_trade_in_appraisal” rewrote its description, which is the text the model reads security
- Tool “schedule_test_drive” rewrote its description, which is the text the model reads security
- Tool “shop_vehicles” rewrote its description, which is the text the model reads security
- Tool “submit_vehicle_inquiry” rewrote its description, which is the text the model reads security
- “find_dealerships” added an optional parameter “country” cosmetic
- “shop_vehicles” added an optional parameter “country” cosmetic
- “request_trade_in_appraisal” reworded the description of “allowed_channels” cosmetic
- “request_trade_in_appraisal” reworded the description of “consent_granted_at” cosmetic
- “request_trade_in_appraisal” reworded the description of “consent_text” cosmetic
- “request_trade_in_appraisal” reworded the description of “dry_run” cosmetic
- “request_trade_in_appraisal” reworded the description of “email” cosmetic
- “request_trade_in_appraisal” reworded the description of “listing_id” cosmetic
- “request_trade_in_appraisal” reworded the description of “message” cosmetic
- “request_trade_in_appraisal” reworded the description of “phone” cosmetic
- “schedule_test_drive” reworded the description of “allowed_channels” cosmetic
- “schedule_test_drive” reworded the description of “consent_granted_at” cosmetic
- “schedule_test_drive” reworded the description of “consent_text” cosmetic
- “schedule_test_drive” reworded the description of “dry_run” cosmetic
- “schedule_test_drive” reworded the description of “email” cosmetic
- “schedule_test_drive” reworded the description of “listing_id” cosmetic
- “schedule_test_drive” reworded the description of “message” cosmetic
- “schedule_test_drive” reworded the description of “phone” cosmetic
- “shop_vehicles” reworded the description of “conditions” cosmetic
- “shop_vehicles” reworded the description of “features” cosmetic
- “shop_vehicles” reworded the description of “radius_miles” cosmetic
- “shop_vehicles” reworded the description of “request” cosmetic
- “shop_vehicles” reworded the description of “sort_by” cosmetic
- “shop_vehicles” reworded the description of “vehicle_types” cosmetic
- “submit_vehicle_inquiry” reworded the description of “allowed_channels” cosmetic
- “submit_vehicle_inquiry” reworded the description of “consent_granted_at” cosmetic
- “submit_vehicle_inquiry” reworded the description of “consent_text” cosmetic
- “submit_vehicle_inquiry” reworded the description of “dry_run” cosmetic
- “submit_vehicle_inquiry” reworded the description of “email” cosmetic
- “submit_vehicle_inquiry” reworded the description of “listing_id” cosmetic
- “submit_vehicle_inquiry” reworded the description of “message” cosmetic
- “submit_vehicle_inquiry” reworded the description of “phone” cosmetic
- Tool “compare_vehicles” changed its title: Compare two to four live listings → Compare vehicles cosmetic
- Tool “fetch” changed its title: Fetch one live vehicle listing for citation → Fetch citation cosmetic
- Tool “find_dealerships” changed its title: Find participating US dealerships → Find US/CA dealerships cosmetic
- Tool “get_vehicle” changed its title: Get one live listing by stable ID → Get vehicle details cosmetic
- Tool “request_trade_in_appraisal” changed its title: Request a trade-in appraisal → Request trade-in cosmetic
- Tool “schedule_test_drive” changed its title: Request a test drive → Request test drive cosmetic
- Tool “search” changed its title: Search live vehicle listings for citations → Search citations cosmetic
- Tool “shop_vehicles” changed its title: Shop connected US dealership inventory → Shop vehicles cosmetic
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 2 Oct 2026 · Probed https://mcp.carhandshake.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=mcp.carhandshake.com | CN=Amazon RSA 2048 M04,O=Amazon,C=US | 14 Jul 2026 | 27 Jan 2027 | RSA 2048 | SHA256-RSA | ba841d4955fb412ea165bddbda51fb9 |
| SANs: mcp.carhandshake.com | ||||||
| CN=Amazon RSA 2048 M04,O=Amazon,C=US (CA) | CN=Amazon Root CA 1,O=Amazon,C=US | 23 Aug 2022 | 23 Aug 2030 | RSA 2048 | SHA256-RSA | 773124f2a952e3ed18a58bdb85d1bc0ce5f27 |
| CN=Amazon Root CA 1,O=Amazon,C=US (CA) | CN=Starfield Services Root Certificate Authority - G2,O=Starfield Technologies\, Inc.,L=Scottsdale,ST=Arizona,C=US | 25 May 2015 | 31 Dec 2037 | RSA 2048 | SHA256-RSA | 67f944a2a27cdf3fac2ae2b01f908eeb9c4c6 |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.carhandshake.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| carhandshake.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000 |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.carhandshake.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.carhandshake.com/mcp | HTTPS enforced | 301 | https://mcp.carhandshake.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
compare_vehicles Compare vehicles ~70
Only for explicit comparison: after exactly one shop_vehicles call, pass 2-4 distinct returned listing IDs. Never search or shop again.
| Name | Type | Req | Description |
|---|---|---|---|
| listing_ids | array | yes | 2-4 exact IDs returned by shop_vehicles. |
| priorities | array | – | Shopper priorities, up to eight. |
| Name | Type | Req | Description |
|---|---|---|---|
| compared | integer | yes | – |
| missing_listing_ids | array | yes | – |
| recommendation | object | yes | – |
| vehicles | array | yes | – |
No examples provided.
fetch Fetch citation ~34
Citation only after search; never shopping/detail. Fetch one exact ID.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Exact listing ID returned by search. |
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | – |
| metadata | object | – | – |
| text | string | yes | – |
| title | string | yes | – |
| url | string | yes | – |
No examples provided.
find_dealerships Find US/CA dealerships ~100
Use this once to find dealerships by name/place with IDs, addresses, and listing counts. Named stock: one shop_vehicles call with a returned dealer_id. For contacts or sales/service hours: get_dealership once.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | – | US default; CA for Canada. Quebec excluded. |
| limit | integer | – | – |
| location | string | – | Place or postal text exactly as supplied. |
| query | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| dealerships | array | yes | – |
| interpreted_location | object|null | yes | – |
| next_action | string | yes | – |
| total | integer | yes | – |
No examples provided.
get_dealership Get dealership locations, hours, and contacts ~43
Use this with an exact dealer_id to return every public rooftop, contact, site, capability, and named sales/service schedule.
| Name | Type | Req | Description |
|---|---|---|---|
| dealer_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| agent_card_url | string|null | yes | – |
| dealer_id | string | yes | – |
| domain | string | yes | – |
| locations | array | yes | – |
| name | string | yes | – |
| vehicle_count | integer | yes | – |
No examples provided.
get_vehicle Get vehicle details ~34
For full detail, pass exact shop_vehicles listing_id; returns dealer.dealer_id.
| Name | Type | Req | Description |
|---|---|---|---|
| listing_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| battery_kwh | number|null | – | – |
| body | string|null | – | – |
| charge_port | string|null | – | – |
| city_mpg | integer|null | – | – |
| condition | string|null | – | – |
| currency | string | – | – |
| dc_fast_charge | boolean|null | – | – |
| dealer | object | yes | – |
| description | string|null | – | – |
| displacement_cc | number|null | – | – |
| distance_miles | number|null | – | – |
| driveline | string|null | – | – |
| electric_range_miles | number|null | – | – |
| engine | string|null | – | – |
| exterior_color | string|null | – | – |
| features | array | – | – |
| fuel | string|null | – | – |
| highway_mpg | integer|null | – | – |
| interior_color | string|null | – | – |
| listing_id | string | yes | – |
| listing_url | string|null | – | – |
| listing_url_source | string|null | – | – |
| location | object | yes | – |
| make | string | yes | – |
| mileage | integer|null | – | – |
| model | string | yes | – |
| motor_power_hp | number|null | – | – |
| msrp | integer|null | – | – |
| photos | array | – | – |
| price | integer|null | – | – |
| primary_photo_url | string|null | – | – |
| status | string | yes | – |
| stock | string|null | – | – |
| transmission | string|null | – | – |
| trim | string|null | – | – |
| updated_at | string | – | – |
| vehicle_type | string | yes | – |
| vin | string | – | – |
| year | integer | yes | – |
No examples provided.
request_trade_in_appraisal Request trade-in ~227
After explicit consent and confirmation, request a trade-in appraisal for this listing.
| Name | Type | Req | Description |
|---|---|---|---|
| allowed_channels | array | yes | Consent channels. |
| consent_granted_at | string | yes | Consent timestamp (RFC 3339). |
| consent_text | string | yes | Accepted consent words; never fabricate consent. |
| dry_run | boolean | – | Validate with no dealer contact. |
| string | – | Email (or phone required). | |
| first_name | string | yes | First name. |
| idempotency_key | string | yes | Unique retry key. |
| last_name | string | yes | Last name. |
| listing_id | string | yes | Exact listing_id from prior results. |
| message | string | – | Dealer note. |
| phone | string | – | E.164 phone (or email required). |
| preferred_contact | string | – | – |
| trade_in_condition | string | – | – |
| trade_in_make | string | yes | – |
| trade_in_mileage | integer | – | – |
| trade_in_model | string | yes | – |
| trade_in_trim | string | – | – |
| trade_in_year | integer | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| lead_id | string | yes | – |
| status | string | yes | – |
No examples provided.
schedule_test_drive Request test drive ~177
After explicit consent and confirmation, request a test drive for this listing.
| Name | Type | Req | Description |
|---|---|---|---|
| allowed_channels | array | yes | Consent channels. |
| appointment_at | string | – | – |
| consent_granted_at | string | yes | Consent timestamp (RFC 3339). |
| consent_text | string | yes | Accepted consent words; never fabricate consent. |
| dry_run | boolean | – | Validate with no dealer contact. |
| string | – | Email (or phone required). | |
| first_name | string | yes | First name. |
| idempotency_key | string | yes | Unique retry key. |
| last_name | string | yes | Last name. |
| listing_id | string | yes | Exact listing_id from prior results. |
| message | string | – | Dealer note. |
| phone | string | – | E.164 phone (or email required). |
| preferred_contact | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| lead_id | string | yes | – |
| status | string | yes | – |
No examples provided.
search Search citations ~37
Citation only; never shopping/detail/compare. Search once, then fetch exact IDs.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | Vehicle-shopping query, verbatim. |
| Name | Type | Req | Description |
|---|---|---|---|
| next_action | string | yes | – |
| results | array | yes | – |
No examples provided.
shop_vehicles Shop vehicles ~506
Use for live US/CA cars/SUVs/trucks/EVs/motorcycles/RVs/trailers by place (near me), budget, mileage, make/model, condition, body, fuel, features, named dealer, or live-listing recommendation. Quebec excluded. Call once; never retry/refine/broaden. Fallback stays in-country; filters exact. Facts only; web only if asked. Named-dealer stock: find_dealerships then shop. Not repair/reliability/facts/MSRP/out-of-market, named-source, web-only, or no-app. Verbatim request; never ask for ZIP/postal.
| Name | Type | Req | Description |
|---|---|---|---|
| bodies | array | – | – |
| charge_ports | array | – | – |
| conditions | array | – | – |
| country | string | – | US default; CA supported outside Quebec. |
| cursor | string | – | – |
| dc_fast_charge | boolean | – | – |
| dealer_ids | array | – | – |
| displacement_cc_max | integer | – | – |
| displacement_cc_min | integer | – | – |
| drivelines | array | – | – |
| electric_range_max | number | – | – |
| electric_range_min | number | – | – |
| exterior_colors | array | – | – |
| features | array | – | Classes: third_row, awd_4wd, tow_package, apple_carplay, android_auto, adaptive_cruise, leather, heated_seats, ev_range_200_plus. |
| fuels | array | – | – |
| interior_colors | array | – | – |
| limit | integer | – | – |
| location_text | string | – | Free-text city/place/state/postal exactly as the shopper supplied; never ask for a ZIP code. |
| makes | array | – | – |
| mileage_max | integer | – | – |
| models | array | – | – |
| nationwide | boolean | – | – |
| price_max | integer | – | – |
| price_min | integer | – | – |
| radius_miles | number | – | US miles; CA kilometres. Fallback widens geography only; filters remain exact. |
| request | string | yes | Verbatim shopper request. |
| sort_by | string | – | Default: relevance. |
| sort_direction | string | – | – |
| statuses | array | – | Omit unless status is explicit; omission searches both available and intransit. |
| transmissions | array | – | – |
| trims | array | – | – |
| vehicle_types | array | – | – |
| year_max | integer | – | – |
| year_min | integer | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| applied_filters | object | yes | – |
| coverage | object | yes | – |
| fallback | object | yes | – |
| freshness | object | yes | – |
| interpreted_request | object | yes | – |
| matches | array | yes | – |
| next_action | string | yes | – |
| next_cursor | string|null | yes | – |
| suggested_relaxations | array | yes | – |
| total | integer | yes | – |
| total_relation | string | yes | – |
No examples provided.
submit_vehicle_inquiry Send a vehicle inquiry ~170
After explicit consent and confirmation, send this listing's dealer a question.
| Name | Type | Req | Description |
|---|---|---|---|
| allowed_channels | array | yes | Consent channels. |
| consent_granted_at | string | yes | Consent timestamp (RFC 3339). |
| consent_text | string | yes | Accepted consent words; never fabricate consent. |
| dry_run | boolean | – | Validate with no dealer contact. |
| string | – | Email (or phone required). | |
| first_name | string | yes | First name. |
| idempotency_key | string | yes | Unique retry key. |
| last_name | string | yes | Last name. |
| listing_id | string | yes | Exact listing_id from prior results. |
| message | string | yes | Dealer note. |
| phone | string | – | E.164 phone (or email required). |
| preferred_contact | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| lead_id | string | yes | – |
| status | string | yes | – |
No examples provided.
What is the Car Handshake MCP server?
Car Handshake is an MCP server listed in the public MCP registry as com.carhandshake/inventory. Find and compare live vehicle inventory from participating US dealers and contact them with consent. This page covers its hosted endpoint (https://mcp.carhandshake.com/mcp).
Is the Car Handshake MCP server safe to use?
Car Handshake scores 80 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Car Handshake MCP server expose?
Car Handshake exposes 10 tools: shop_vehicles, get_vehicle, search, fetch, compare_vehicles, and 5 more. Their descriptions and schemas cost roughly 1,398 tokens of context every time the server is loaded.
Does the Car Handshake MCP server require authentication?
No. We connected to Car Handshake without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Car Handshake MCP server still maintained?
Car Handshake is still listed as active in the MCP registry. We last reached this channel on 2 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.