Causal check on AI agent claims, from ad-spend/ROAS lift to any decision: pass, caution or hold.
Connect Remote server
claude mcp add --transport http guardian https://guardian.sylai.io/mcp --header "X-API-Key: <X_API_KEY>"
{
"mcpServers": {
"guardian": {
"url": "https://guardian.sylai.io/mcp",
"headers": {
"X-API-Key": "<X_API_KEY>"
}
}
}
}
{
"servers": {
"guardian": {
"type": "http",
"url": "https://guardian.sylai.io/mcp",
"headers": {
"X-API-Key": "<X_API_KEY>"
}
}
}
}
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_reviewSanity-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_uploadGet 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
| Name | Description |
|---|---|
X-API-KeyRequired, secret | Your Syl Guardian API key (get a trial key at https://sylai.io/guardian). |
Details
| Endpoint | https://guardian.sylai.io/mcp (Streamable HTTP) |
| First published | 28 Oct 2026 |
| Last updated | 28 Oct 2026 |
| Registry name | io.sylai/guardian |
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