What is the key difference between PageLens AI and Kastell?

PageLens AI belongs to the Security category with cloud HTTP/SSE execution, while Kastell belongs to the Security category with local stdio execution.

How do I install PageLens AI or Kastell 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 PageLens AI and Kastell free or paid?

PageLens AI operates under a Free / Open Source model (OAuth 2.0). Kastell operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

PageLens AI lists 4 tools with 3 views and 1 GitHub stars. Kastell lists 6 tools with 4 views and 59 GitHub stars.

Can I use both PageLens AI and Kastell 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

PageLens AI vs Kastell

In-depth architectural comparison of the PageLens AI and Kastell 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

PageLens AI

Security · Remote HTTP/SSE

Quality: 49/100 (Fair) | Auth: OAuth 2.0

Kastell

Security · Local stdio

Quality: 63/100 (Good) | Auth: No auth required

Verdict Summary: Choose PageLens AI if you need specialized Security tools running via a hosted cloud SSE transport. Choose Kastell if your workspace requires Security integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose PageLens AI when:

You need dedicated capabilities in the Security domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: OAuth 2.0 (Free / Open Source).
Primary tools included: whoami, list_domains, list_scans.

Explore PageLens AI Details

Choose Kastell when:

You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Server security audits with remediation, SSH hardening and fail2ban setup, UFW firewall management.

Explore Kastell Details

Feature & Specification Comparison

Specification	PageLens AI Security	Kastell kastelldev Security
Summary	AI website audit: security, SEO, performance, UX and accessibility checks with actionable fixes.	Server security auditing and hardening toolkit. 413 security checks across 29 categories (SSH, Firewall, Docker, TLS, HTTP Headers), CIS/PCI-DSS/HIPAA compliance mapping, 19-step production hardening, fleet management, and forensic evidence collection. Supports Hetzner, DigitalOcean, Vultr, and Linode. 13 MCP tools.
Category & Scope	Security

Tools & Capabilities Breakdown

PageLens AI Tools (4)

whoami

Confirm which PageLens account this MCP session is operating on, plus granted OAuth scopes.

list_domains

List the domains you've verified ownership of, along with badge tier and the scan currently anchored to the public badge.

list_scans

List your most recent PageLens scans. Filter by status, domain, or date. Returns a slim summary per scan (id, URL, score, grade, severity counts, and `launchVerdict`). Scans may include `launchContext` with `builderPlatform` and `launchMoment` so agents can frame fixes for the owner's workflow with…

get_scan

Read the full summary for a single scan: score, grade, owner-first `launchVerdict`, severity counts, launch context, executive summary, top-5 highest-priority findings, and per-persona reviews. For QA Audit scans, `get_scan` also returns a `qaAudit` block containing the product-flow synthesis, jour…

Kastell Tools (6)

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).

PageLens AI Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "pagelens-ai": {
      "url": "https://www.pagelensai.com/api/mcp"
    }
  }
}

Kastell Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "kastelldev-kastell": {
      "command": "npx",
      "args": [
        "-y",
        "kastell"
      ]
    }
  }
}

Frequently Asked Questions

PageLens AI is categorized under Security and uses a remote streaming HTTP/SSE transport. In contrast, Kastell belongs to Security using local stdio subprocess. Select PageLens AI when you need capabilities focused on security and Kastell when you require tools for security.

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