What is the key difference between CatchDoms — Expired Domains API and Opik MCP?

CatchDoms — Expired Domains API belongs to the Monitoring category with cloud HTTP/SSE execution, while Opik MCP belongs to the Monitoring category with local stdio execution.

How do I install CatchDoms — Expired Domains API or Opik MCP 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 CatchDoms — Expired Domains API and Opik MCP free or paid?

CatchDoms — Expired Domains API operates under a Free / Open Source model (No auth required). Opik MCP operates under a BYOK (Pay Provider Direct) model (API Key required).

Which MCP server has more tools and community activity?

CatchDoms — Expired Domains API lists 4 tools with 1 views and 2 GitHub stars. Opik MCP lists 6 tools with 1 views and 217 GitHub stars.

Can I use both CatchDoms — Expired Domains API and Opik MCP 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.

How do I install CatchDoms — Expired Domains API or Opik MCP in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are CatchDoms — Expired Domains API and Opik MCP free to use, or do they require API keys?

CatchDoms — Expired Domains API is listed under a Free / Open Source model with No auth required . Opik MCP operates under a BYOK (Pay Provider Direct) model with API Key required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both CatchDoms — Expired Domains API and Opik MCP at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both catchdoms-expired-domains-api and comet-ml-opik-mcp as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, CatchDoms — Expired Domains API has a Quality Score of 48 /100 ( Fair ) with 1 views, 0 installs, and 2 GitHub stars. Opik MCP holds a Quality Score of 59 /100 ( Good ) with 1 views, 0 installs, and 217 GitHub stars.

Side-by-Side Model Context Protocol Comparison

CatchDoms — Expired Domains API vs Opik MCP

In-depth architectural comparison of the CatchDoms — Expired Domains API and Opik MCP 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

CatchDoms — Expired Domains API

Monitoring · Remote HTTP/SSE

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

Opik MCP

Monitoring · Local stdio

Quality: 59/100 (Good) | Auth: API Key required

Verdict Summary: Choose CatchDoms — Expired Domains API if you need specialized Monitoring tools running via a hosted cloud SSE transport. Choose Opik MCP if your workspace requires Monitoring integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose CatchDoms — Expired Domains API when:

You need dedicated capabilities in the Monitoring domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: search_domains, get_domain, list_filters.

Explore CatchDoms — Expired Domains API Details

Choose Opik MCP when:

You need dedicated capabilities in the Monitoring domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
You have access to required keys: OPIK_API_KEY, OPIK_WORKSPACE, COMET_WORKSPACE, COMET_URL_OVERRIDE, OPIK_URL, OPIK_MCP_ANALYTICS_SOURCE.
Primary tools included: read, list, ask_ollie.

Feature & Specification Comparison

Specification	CatchDoms — Expired Domains API Monitoring	Opik MCP Comet-ML Monitoring
Summary	Search 40K+ expired domains from 12 auction platforms with SEO metrics and scores.	Use natural language to explore LLM observability, traces, and monitoring data captured by Opik.
Category & Scope	Monitoring	Monitoring

Tools & Capabilities Breakdown

CatchDoms — Expired Domains API Tools (4)

search_domains

Search for domains with filters. Returns up to 100 results sorted by quality.

get_domain

Get full details for a specific domain.

list_filters

Get available filter options with counts — sources, TLDs, and languages.

get_stats

Get platform statistics — total domains, new today, by source, SEO coverage.

Opik MCP Tools (6)

read

One tool for any "show me X" question. Takes an `entity_type` plus an `id`

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).

CatchDoms — Expired Domains API Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "catchdoms-expired-domains-api": {
      "url": "https://catchdoms.com/mcp/catchdoms/free"
    }
  }
}

Opik MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "comet-ml-opik-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "opik-mcp"
      ],
      "env": {
        "OPIK_API_KEY": "YOUR_OPIK_API_KEY_HERE",
        "OPIK_WORKSPACE": "YOUR_OPIK_WORKSPACE_HERE",
        "COMET_WORKSPACE": "YOUR_COMET_WORKSPACE_HERE",
        "COMET_URL_OVERRIDE": "YOUR_COMET_URL_OVERRIDE_HERE",
        "OPIK_URL": "YOUR_OPIK_URL_HERE",
        "OPIK_MCP_ANALYTICS_SOURCE": "YOUR_OPIK_MCP_ANALYTICS_SOURCE_HERE"
      }
    }
  }
}

Frequently Asked Questions

CatchDoms — Expired Domains API is categorized under Monitoring and uses a remote streaming HTTP/SSE transport. In contrast, Opik MCP belongs to Monitoring using local stdio subprocess. Select CatchDoms — Expired Domains API when you need capabilities focused on monitoring and Opik MCP when you require tools for monitoring.

More alternatives to CatchDoms — Expired Domains API More alternatives to Opik MCP Monitoring category hub