Kastell vs ScreenSeal
A side-by-side look at the Kastell and ScreenSeal MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Kastell for security work as a local process; choose ScreenSeal for security. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Kastell when
- You need dedicated capabilities in the Security domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
Choose ScreenSeal when
- You need dedicated capabilities in the Security domain.
- Its auth model fits you: No auth required.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Security | Security |
| Quality signal | 61/100 · Good | 32/100 · Emerging |
| Install command | Confirmed | Not confirmed yet |
| Transport | Local subprocess (stdio) | — |
| Auth | No auth required | No auth required |
| Pricing | Free | Free |
| Required env vars | None listed | None listed |
| Verified owner |
Tools & capabilities
Kastell tools
No tool names declared yet. Check the project README from the listing page.
ScreenSeal tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Kastell
{
"mcpServers": {
"kastelldev-kastell": {
"command": "npx",
"args": [
"-y",
"kastell"
]
}
}
}
ScreenSeal
No confirmed install command for ScreenSeal yet — follow the setup steps linked from its listing page rather than a guessed package name.
Frequently asked questions
Kastell is categorized under Security and uses a local stdio subprocess. ScreenSeal belongs to Security and uses an install path we have not confirmed yet. Pick Kastell for security work and ScreenSeal for security.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. ScreenSeal has no confirmed install command yet — follow its own setup instructions.
Kastell is listed as free. Auth: no auth required. ScreenSeal is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add kastelldev-kastell and screenseal as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Kastell has a quality signal of 61/100 (Good) with 4 views, 0 installs and 60 GitHub stars. ScreenSeal has 32/100 (Emerging) with 0 views, 0 installs and 0 GitHub stars.
