# DealScore (remote · cardealscore.com)

For AI agents: grade a used car's asking price vs live market comps.

- Trust score: 89/100 (high trust)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `cardealscore.com`: 89/100 (this document), [markdown](https://verifymcp.io/servers/com-cardealscore-dealscore/api-mcp.md), [page](https://verifymcp.io/servers/com-cardealscore-dealscore/api-mcp)

## Channel facts

- Endpoint: `https://cardealscore.com/api/mcp`
- Transports: `streamable-http`
- Auth: `required`
- Version: `0.1.1`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 97/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
  - The authorisation server supports Client ID Metadata Documents, the current MCP client-registration mechanism.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 64/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 384 tokens (~96/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 93/100
  - Stability observed for 28 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 75/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 26% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the DealScore MCP server?

DealScore is a hosted endpoint at https://cardealscore.com/api/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.

### Claude

```bash
claude mcp add --transport http com-cardealscore-dealscore 'https://cardealscore.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-cardealscore-dealscore": {
      "url": "https://cardealscore.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-cardealscore-dealscore": {
      "type": "http",
      "url": "https://cardealscore.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-cardealscore-dealscore]
url = "https://cardealscore.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-cardealscore-dealscore": {
      "type": "remote",
      "url": "https://cardealscore.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-cardealscore-dealscore --url 'https://cardealscore.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-cardealscore-dealscore:
    url: "https://cardealscore.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-cardealscore-dealscore": {
      "Transport": "http",
      "Url": "https://cardealscore.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-cardealscore-dealscore -t streamable-http -u 'https://cardealscore.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-cardealscore-dealscore": {
      "type": "http",
      "url": "https://cardealscore.com/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-03 (score 89, +2)

- [functional regression] Schema quality: 67 → 96
- [functional improvement] Tool coverage: 0% → 26%
- [functional] New tool “check_quote”

### 2026-11-01 (score 87, +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.

### 2026-10-30 (score 86, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 85, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 84, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 83, 0)

- [functional] Server version: 0.1.0 → 0.1.1

### 2026-10-23 (score 83, +1)

- [security] Tool “explain_grade” rewrote its description, which is the text the model reads

### 2026-10-21 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (4)

### `score_deal` (~94 tokens)

Score Deal

Grade a car deal: compare asking price to expected market value. ZIP is optional. Same inputs/outputs as POST /api/score.

Input parameters:

- `asking_price` (number, required)
- `make` (string)
- `mileage` (number, required)
- `model` (string)
- `trim` (string)
- `vin` (string)
- `year` (integer)
- `zip` (string)

### `explain_grade` (~36 tokens)

Explain Grade

Explain the score_v2 rubric grade for a delta_pct. Same as POST /api/explain.

Input parameters:

- `delta_pct` (number, required)

### `health` (~26 tokens)

Health

Service health, coverage, cache policy, and limitations. Same as GET /api/health.

### `check_quote` (~181 tokens)

Check Quote

Check a car dealer's quote. Returns a grade from A to F, the flagged fees and add-ons, and lines to send the dealer. Pass paste (the quote text), or selling_price and msrp. 3 free checks per UTC month. Same as POST /api/quote-check.

Input parameters:

- `invoice` (number): Dealer invoice in dollars.
- `lines` (array): Fees and add-ons in dollars. Set kind when known. Otherwise the label decides.
- `make` (string)
- `model` (string)
- `msrp` (number): MSRP in dollars.
- `paste` (string): The dealer quote as text. Used for this check only and never stored.
- `selling_price` (number): Selling price in dollars.
- `trim` (string)
- `vin` (string)
- `year` (integer)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-cardealscore-dealscore/api-mcp#diagnostics

## Score history

- 2026-11-05: 89
- 2026-11-04: 89
- 2026-11-03: 89
- 2026-11-02: 87
- 2026-11-01: 87
- 2026-10-31: 86
- 2026-10-30: 86
- 2026-10-29: 85
- 2026-10-28: 85
- 2026-10-27: 85
- 2026-10-26: 84
- 2026-10-25: 84
- 2026-10-24: 83
- 2026-10-23: 83
- 2026-10-22: 82
- 2026-10-21: 82
- 2026-10-20: 81
- 2026-10-19: 81
- 2026-10-18: 80
- 2026-10-17: 80
- 2026-10-16: 79
- 2026-10-15: 79
- 2026-10-14: 78
- 2026-10-13: 78
- 2026-10-12: 78
- 2026-10-10: 77
- 2026-10-09: 76

## Common questions

### What is the DealScore MCP server?

DealScore is an MCP server listed in the public MCP registry as com.cardealscore/dealscore. For AI agents: grade a used car's asking price vs live market comps. This page covers its hosted endpoint (https://cardealscore.com/api/mcp).

### Is the DealScore MCP server safe to use?

DealScore scores 89 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 DealScore MCP server expose?

DealScore exposes 4 tools: score_deal, explain_grade, health, check_quote. Their descriptions and schemas cost roughly 337 tokens of context every time the server is loaded.

### Does the DealScore MCP server require authentication?

Yes. DealScore asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.

### Is the DealScore MCP server still maintained?

DealScore is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://cardealscore.com/api/mcp
- Website: https://cardealscore.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-cardealscore-dealscore/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-cardealscore-dealscore/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-cardealscore-dealscore/api-mcp