Dominion Observatory

An observatory that probes every MCP server in the official MCP registry and reports which ones actually work: live, auth-gated, dead, or erroring.

View on dominionobservatory.com

Documentation

Know when your MCPtools change.

Track changes to tool names, descriptions and input schemas. Get email or webhook alerts from scheduled checks of compatible public MCP endpoints.

47,557

Projects indexed

311

Projects with runtime measurements

Endpoints previously checked

Last verified Oct 16, 2026, 3:35 PM UTC
Cached statistics; indexing and runtime measurements are separate.

Coverage and monitoring limits

Listed projects are an index only, not a monitored fleet.

47,557 indexed projects · 82 endpoint candidates · 9 endpoints previously checked; 311 projects with runtime measurements. Listed projects are not necessarily monitored. Coverage last verified Oct 16, 2026, 3:35 PM UTC. Cached coverage; confirmed live means previously observed, not a current uptime guarantee. UNRATED means not measured.

Manifest history is public. Legacy captures remain unsigned. Detection intervals are not guaranteed, and a changed definition alone does not establish a security issue. Read the monitoring guide.

# Fail-closed policy: UNRATED, NOT FOUND, errors and scores below 70 block.
# Requires curl 7.76+ and jq. Set MCP_URL to the intended server URL.
: "${MCP_URL:?Set MCP_URL first}"
if ! response=$(curl --fail-with-body --silent --show-error --get   --data-urlencode "url=$MCP_URL" "https://dominionobservatory.com/api/trust"); then
  echo "Blocked: registry request failed" >&2; exit 1
fi
if ! printf '%s' "$response" | jq -e '
  type == "object" and .found == true and .runtime_measured == true
  and (.error == null) and (.trust_score | type == "number")
  and (.trust_score >= 70 and .trust_score <= 100)' >/dev/null; then
  echo "Blocked: UNRATED, missing, invalid response or below policy" >&2; exit 1
fi
echo "Measured score meets policy; this does not guarantee safety."

This example fails closed. A fail-open policy may log a warning and continue after independent review, but must never label an unknown or failed lookup as a passing trust check.

Why teams scan with Observatory

47,557 projects indexed. Behavioral scores are available only for servers with measured runtime data. Other projects are UNRATED, with a null trust score. Receipts support evidence review; they do not guarantee safety or compliance.

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Trust Verification

Servers with measured runtime data can receive behavioral scores based on observed reliability. Indexed projects without measurements are UNRATED (not measured). An API error is an unavailable assessment, not a passing result.

📋

Compliance Attestation

Tamper-evident, machine-readable runtime records designed to support audit evidence, internal governance, and applicable record-keeping assessments. Legal compliance depends on your organisation, system classification, and deployment context — a Dominion receipt alone does not establish compliance.

🌐

Gateway Proxy

Route any MCP server through Observatory. Trust checks happen transparently. No code changes needed — just change the URL.

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Behavioral Baselines

Cross-ecosystem reliability baselines built from agent-reported telemetry. Data that ages into compounding value.

⚡

AIO Audit

Agent Information Optimization — check any MCP server's discoverability to AI agents. Scores llms.txt, agent.json, registry presence, and more. Try it free →

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Priced for teams, not experiments

Scan your first server free. CI/monitoring plans for platform teams, and a Compliance tier with signed attestations for audit and vendor-risk reviews. See pricing →