What is the key difference between Contrast Checker MCP and Hermes Action Bridge?

Contrast Checker MCP belongs to the Developer Tools category with local stdio execution, while Hermes Action Bridge belongs to the Developer Tools category with local stdio execution.

How do I install Contrast Checker MCP or Hermes Action Bridge in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Contrast Checker MCP and Hermes Action Bridge free or paid?

Contrast Checker MCP operates under a Free / Open Source model (No auth required). Hermes Action Bridge operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Contrast Checker MCP lists 3 tools with 0 views and 0 GitHub stars. Hermes Action Bridge lists 5 tools with 2 views and 5 GitHub stars.

Can I use both Contrast Checker MCP and Hermes Action Bridge together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Contrast Checker MCP vs Hermes Action Bridge

In-depth architectural comparison of the Contrast Checker MCP and Hermes Action Bridge MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Contrast Checker MCP

Developer Tools · Local stdio

Quality: 48/100 (Fair) | Auth: No auth required

Hermes Action Bridge

Developer Tools · Local stdio

Quality: 57/100 (Good) | Auth: No auth required

Verdict Summary: Choose Contrast Checker MCP if you need specialized Developer Tools tools running via a local process. Choose Hermes Action Bridge if your workspace requires Developer Tools integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Contrast Checker MCP when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: check_contrast, suggest_accessible_color, parse_color.

Explore Contrast Checker MCP Details

Choose Hermes Action Bridge when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: hermes_run, hermes_plan, hermes_capabilities.

Explore Hermes Action Bridge Details

Feature & Specification Comparison

Specification	C Contrast Checker MCP Developer Tools	Hermes Action Bridge Developer Tools
Summary	MCP - WCAG 2.1 color contrast checker - contrast ratios, compliance and accessible color suggestions	Delegate real-world actions from Claude Code, Codex, and other agents to Hermes Agent.
Category & Scope	Developer Tools	Developer Tools

Tools & Capabilities Breakdown

Contrast Checker MCP Tools (3)

check_contrast

Check the contrast ratio between two colors and evaluate WCAG 2.1 compliance.

suggest_accessible_color

Suggest a replacement color that meets a WCAG contrast target, keeping the hue as close to the original as possible.

parse_color

Parse a color string and return it in multiple formats.

Hermes Action Bridge Tools (5)

hermes_run

delegate a request to Hermes. Optional overrides: `mode`, `preset`, `contextFiles`, `yolo`, `dryRun`, and — to trade cost for speed on simple tasks — `model`, `provider`, `maxTurns`, `timeoutSeconds`. Any effective `execute` request opens an interactive confirmation form first.

hermes_plan

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Contrast Checker MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "contrast-checker-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "contrast-checker-mcp"
      ]
    }
  }
}

Hermes Action Bridge Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "hermes-action-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "skills"
      ]
    }
  }
}

Frequently Asked Questions

Contrast Checker MCP is categorized under Developer Tools and uses a local stdio subprocess. In contrast, Hermes Action Bridge belongs to Developer Tools using local stdio subprocess. Select Contrast Checker MCP when you need capabilities focused on developer tools and Hermes Action Bridge when you require tools for developer tools.

More alternatives to Contrast Checker MCP More alternatives to Hermes Action Bridge Developer Tools category hub