OperStack MCP

OperStack provides a free remote MCP server that allows AI assistants to measure a public website's visibility to AI answer engines. It offers tools to score sites on AI readability, compare up to four sites, check llms.txt maps, and read AI visit counters. Subscribers can also access weekly reports on how AI assistants mention their brand.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-19Operated by OperStack

MCP endpoint (Streamable HTTP)

https://oper-stack.com/api/mcp/

Vendor documentation

What you can do with it

Score a public site out of 100 for AI visibility
Compare up to four sites on the same AI-visibility scale
Check if a site's llms.txt file leads to valid pages
Read the site owner's AI visit counter data

Tools advertised by the last live check:

audit_site
compare_sites
check_llms_txt
ai_visits
check_counter_installed
my_visibility
who_instead
fix_of_the_week
what_changed
check_rival
my_questions

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http operstack-mcp https://oper-stack.com/api/mcp/

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add operstack-mcp --url https://oper-stack.com/api/mcp/

Cursor

Merge this server into .cursor/mcp.json in your project, then enable operstack-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "operstack-mcp": {
      "url": "https://oper-stack.com/api/mcp/"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "operstack-mcp": {
      "type": "streamableHttp",
      "url": "https://oper-stack.com/api/mcp/",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start operstack-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "operstack-mcp": {
      "type": "http",
      "url": "https://oper-stack.com/api/mcp/"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http operstack-mcp https://oper-stack.com/api/mcp/

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "operstack-mcp": {
      "url": "https://oper-stack.com/api/mcp/"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "operstack-mcp": {
      "serverUrl": "https://oper-stack.com/api/mcp/"
    }
  }
}

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