Syl Guardian
Rank #48,826io.sylai/guardian
Causal guardrail: pass/caution/hold verdict on a causal claim before an agent acts.
What you can do with Syl Guardian
Syl Guardian is a Model Context Protocol (MCP) server published by connor274. It ranks #48,826 of 152,040 active servers on MCP Toplist. Syl Guardian is listed on Official MCP, with 2 tracked versions. It was first listed on Oct 22, 2026 and most recently updated on Oct 22, 2026.
Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.
What Syl Guardian can and cannot do
Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.
What you need before using Syl Guardian
The hosted endpoint is declared as gated by authentication — connect via its URL and authenticate with the provider (OAuth flow or an API key/header, per its docs).
Declared by the Official MCP Registry, last synced Oct 25, 2026. Not independently verified by MCP Toplist.
Hosted endpoint declared as requiring authentication.
Connect Syl Guardian and confirm it works
claude mcp add --transport http guardian https://guardian.sylai.io/mcpThis endpoint requires authentication — see the server’s docs for credentials.
[mcp_servers.guardian]
url = "https://guardian.sylai.io/mcp"Add to ~/.codex/config.toml. This endpoint requires authentication — see the server’s docs for credentials.
https://guardian.sylai.io/mcpSettings → Connectors → “Add custom connector”, then paste this URL. This endpoint requires authentication — see the server’s docs for credentials.
{
"mcpServers": {
"guardian": {
"url": "https://guardian.sylai.io/mcp"
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). This endpoint requires authentication — see the server’s docs for credentials.
{
"servers": {
"guardian": {
"type": "http",
"url": "https://guardian.sylai.io/mcp"
}
}
}Save as .vscode/mcp.json in your workspace. This endpoint requires authentication — see the server’s docs for credentials.
{
"mcpServers": {
"guardian": {
"serverUrl": "https://guardian.sylai.io/mcp"
}
}
}Add to ~/.codeium/windsurf/mcp_config.json. This endpoint requires authentication — see the server’s docs for credentials.
{
"mcpServers": {
"guardian": {
"url": "https://guardian.sylai.io/mcp"
}
}
}This endpoint requires authentication — see the server’s docs for credentials.
After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.
When to choose another server
No task-specific alternatives are catalogued for Syl Guardianyet; the list above is its publisher's other servers.
What changed, and when this was checked
- First listed
- Oct 22, 2026
- Latest version published
- Oct 22, 2026
- Version history
- 2 versions tracked (below)
- Requirements evidence
- Declared by the Official MCP Registry, last synced Oct 25, 2026. Not independently verified by MCP Toplist.
- Profile checked
- Not yet — purpose, capabilities and requirements above come from registry data only
- Ranking data as of
- Oct 22, 2026
- Official MCP ↗listed since Oct 23, 2026 · still listed
Do you maintain Syl Guardian? to correct or enrich this profile.
Available versions (2)
| Version | Published |
|---|---|
| 0.3.0 | Oct 22, 2026 |
| 0.2.0 | Oct 22, 2026 |
Ranks ahead of 103,214 of 152,040 servers on MCP Toplist.
Show your rank
Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.
[](https://mcptoplist.com/server/io.sylai%2Fguardian)<a href="https://mcptoplist.com/server/io.sylai%2Fguardian"><img src="https://mcptoplist.com/badge/io.sylai%2Fguardian.svg" alt="MCP Toplist: Top 50% of 152,040" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Frequently asked questions
- Who maintains Syl Guardian?
- Syl Guardian is maintained by connor274, which publishes 2 MCP servers (3 total versions) tracked on MCP Toplist.
- Is Syl Guardian listed on the Official MCP Registry?
- Yes — Syl Guardian is listed on the Official MCP Registry.
- How many versions does Syl Guardian have?
- MCP Toplist tracks 2 versions of Syl Guardian, most recently published on Oct 22, 2026.
- Where can I find the source code for Syl Guardian?
- The source code for Syl Guardian is hosted at github.com/connor274/syl-guardian-mcp.
Do you run this server?
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