# Swatch (remote · swatch.clawhard.com)

Check WCAG color contrast, fix failing colors, build 50-950 palettes. No account.

- Trust score: 70/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `swatch.clawhard.com`: 70/100 (this document), [markdown](https://verifymcp.io/servers/com-clawhard-swatch/swatch.md), [page](https://verifymcp.io/servers/com-clawhard-swatch/swatch)

## Channel facts

- Endpoint: `https://swatch.clawhard.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## 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**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS check failed: the endpoint is reachable over plaintext HTTP.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 87/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 1088 tokens (~90/item across 12 items; 6 tools + 6 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% 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 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 8 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.
  - Supports UI / widget rendering.

## Install

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

Swatch is a hosted endpoint at https://swatch.clawhard.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.

### Claude

```bash
claude mcp add --transport http com-clawhard-swatch 'https://swatch.clawhard.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-clawhard-swatch": {
      "url": "https://swatch.clawhard.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-clawhard-swatch": {
      "type": "http",
      "url": "https://swatch.clawhard.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-clawhard-swatch]
url = "https://swatch.clawhard.com/mcp"
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add com-clawhard-swatch --url 'https://swatch.clawhard.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-clawhard-swatch:
    url: "https://swatch.clawhard.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-clawhard-swatch": {
      "Transport": "http",
      "Url": "https://swatch.clawhard.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-clawhard-swatch -t streamable-http -u 'https://swatch.clawhard.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-clawhard-swatch": {
      "type": "http",
      "url": "https://swatch.clawhard.com/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.

### 2026-11-04 (score 70, +1)

- [security] The server rewrote its instructions, which are the text every model session reads
- [functional] Server version: 1.0.0 → 1.0.1

### 2026-11-03 (score 69, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-11-02 (score 69)

First indexed and scored.

## MCP tools (6)

### `swatch_check_contrast` (~177 tokens)

Check the WCAG contrast of a text and background color

Use when the user asks whether a color combination is readable or accessible, passes WCAG AA or AAA, or has enough contrast (text on a background, button, badge, link color). Returns the exact contrast ratio, pass or fail for normal text, large text and UI components at AA and AAA, the APCA lightness contrast and a plain note. Colors can be hex, rgb(), hsl() or CSS names. Example: {"foreground": "#777777", "background": "#ffffff"}. Language models cannot compute this reliably, so call it instead of guessing.

Input parameters:

- `background` (string, required): Background color, e.g. "#ffffff".
- `foreground` (string, required): Text (or icon) color, e.g. "#767676" or "rgb(20 20 20)" or "tomato".

### `swatch_fix_contrast` (~139 tokens)

Find the nearest accessible color that passes contrast

Use when a color pair fails contrast and the user wants the smallest change that makes it pass, such as "make this gray text accessible without changing the look". Returns the closest text color on that background that reaches the target (AA, AAA, AA-large or ui), and separately the closest background, keeping the hue. Example: {"foreground": "#777777", "background": "#ffffff", "target": "AA"}. Returns already_passes if nothing needs to change.

Input parameters:

- `background` (string, required): Current background color.
- `foreground` (string, required): Current text color.
- `target` (string): Contrast target. Default AA.

### `swatch_pick_text_color` (~90 tokens)

Pick black or white text for a background

Use when the user asks what text color (black or white) to put on a given background, button or brand color so it is readable. Returns the better of black or white with both contrast ratios, the WCAG grade and a softer near-black option. Example: {"background": "#ff5a1f"}.

Input parameters:

- `background` (string, required): The surface color the text sits on.

### `swatch_make_scale` (~132 tokens)

Build a 50-950 color palette from one color

Use when the user asks for a palette, shades, tints, a design-token scale or a Tailwind-style 50 to 950 ramp from a brand color. Returns 11 steps that keep the hue, with the hex, contrast on white and on black, and the best text color for each step. Example: {"color": "#ff5a1f", "name": "brand"}.

Input parameters:

- `color` (string, required): Base color, e.g. "#ff5a1f".
- `name` (string): Token name used in the CSS and Tailwind output. Default "brand".

### `swatch_convert_color` (~93 tokens)

Convert a color between hex, rgb, hsl and oklch

Use when the user asks to convert a color between hex, RGB, HSL and OKLCH, or asks what a color is called or how light it is. Returns all formats, the relative luminance and the nearest CSS color name. Example: {"color": "#ff5a1f"}. Exact math, so prefer it to converting by hand.

Input parameters:

- `color` (string, required): Any CSS color.

### `swatch_check_pairs` (~121 tokens)

Check contrast for many color pairs at once

Use when the user has a whole design system, theme or stylesheet and wants every text and background pair checked for accessibility in one go. Takes up to 50 pairs and returns the ratio and AA and AAA results for each, with a count of failures. Example: {"pairs": [{"foreground": "#777", "background": "#fff", "label": "muted text"}, {"foreground": "#fff", "background": "#ff5a1f", "label": "button"}]}.

Input parameters:

- `pairs` (array, required): Pairs to check.

## Diagnostics

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

## Score history

- 2026-11-05: 70
- 2026-11-04: 70
- 2026-11-03: 69
- 2026-11-02: 69

## Common questions

### What is the Swatch MCP server?

Swatch is an MCP server listed in the public MCP registry as com.clawhard/swatch. Check WCAG color contrast, fix failing colors, build 50-950 palettes. No account. This page covers its hosted endpoint (https://swatch.clawhard.com/mcp).

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

Swatch scores 70 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 Swatch MCP server expose?

Swatch exposes 6 tools: swatch_check_contrast, swatch_fix_contrast, swatch_pick_text_color, swatch_make_scale, swatch_convert_color, swatch_check_pairs. Their descriptions and schemas cost roughly 752 tokens of context every time the server is loaded.

### Does the Swatch MCP server require authentication?

No. We connected to Swatch without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Swatch MCP server still maintained?

Swatch 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://swatch.clawhard.com/mcp
- Website: https://swatch.clawhard.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-clawhard-swatch/swatch.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-clawhard-swatch/swatch.json
- HTML version of this page: https://verifymcp.io/servers/com-clawhard-swatch/swatch