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Syl Guardian

io.sylai/guardian · v0.3.1

Causal check on AI agent claims, from ad-spend/ROAS lift to any decision: pass, caution or hold.

Connect Remote server

Terminal
claude mcp add --transport http guardian https://guardian.sylai.io/mcp --header "X-API-Key: <X_API_KEY>"
~/.cursor/mcp.json
{
  "mcpServers": {
    "guardian": {
      "url": "https://guardian.sylai.io/mcp",
      "headers": {
        "X-API-Key": "<X_API_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "guardian": {
      "type": "http",
      "url": "https://guardian.sylai.io/mcp",
      "headers": {
        "X-API-Key": "<X_API_KEY>"
      }
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://guardian.sylai.io/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 2 found in our last check

  • guardian_review

    Sanity-check a causal claim ("cause drove effect") before acting on it. Provide exactly one of ``csv`` (CSV text), ``data`` (list of row objects) or ``dataset_id`` (a dataset uploaded via ``guardian_request_upload``; use this for more than ~200 rows; single-use, deleted when rev…

  • guardian_request_upload

    Get a pre-signed URL for uploading a large CSV (more than ~200 rows). Use this instead of pasting rows into ``guardian_review``. Returns ``upload_url``, ``dataset_id`` and a ready-to-run ``curl`` command: run it (replace ``data.csv`` with your file; gzip is accepted with ``Conte…

Headers

NameDescription
X-API-Key
Required, secret
Your Syl Guardian API key (get a trial key at https://sylai.io/guardian).

Details

Endpointhttps://guardian.sylai.io/mcp (Streamable HTTP)
First published28 Oct 2026
Last updated28 Oct 2026
Registry nameio.sylai/guardian

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