Utility Matrix

Certificate Expiry Checker

certificate-expiry-checker

Read-onlyIdempotent

Assess certificate expiry risk given a domain and days remaining. Returns risk level (OK, WARNING at <30 days, CRITICAL at <7 days, EXPIRED at <0).

Input Schema

TableJSON Schema

Name	Required	Description	Default
`domain`	Yes	Domain name (e.g. "api.example.com")
`days_remaining`	Yes	Days until certificate expires

Output Schema

TableJSON Schema

Name	Required	Description	Default
`domain`	Yes
`next_step`	Yes
`risk_level`	Yes
`next_step_url`	Yes
`why_follow_up`	Yes
`days_remaining`	Yes
`interpretation`	Yes
`affiliate_context`	No
`computation_basis`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 1, 2026
- addedInput schema / properties / domain / maxLength
```
Added value: +253
```
Changed2 schema fields changedSep 28, 2026
- addedInput schema / properties / days_remaining / examples
```
Added value: +[
+  1
+]
```
- addedInput schema / properties / domain / examples
```
Added value: +[
+  "example.com"
+]
```

Changed1 schema field changedJul 15, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": false,
+  "properties": {
+    "affiliate_context": {
+      "additionalProperties": false,
+      "properties": {
+        "affiliate": {
+          "type": "string"
+        },
+        "cta_label": {
+          "type": "string"
+        },
+        "disclosure": {
+          "type": "string"
+        },
+        "framing": {
+          "type": "string"
+        },
+        "posture": {
+          "enum": [
+            "secondary"
+          ],
+          "type": "string"
+        },
+        "slot_id": {
+          "type": "string"
+        },
+        "url": {
+          "type": "string"
+        },
+        "variant": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "affiliate",
+        "cta_label",
+        "disclosure",
+        "framing",
+        "posture",
+        "slot_id",
+        "url",
+        "variant"
+      ],
+      "type": "object"
+    },
+    "computation_basis": {
+      "type": "string"
+    },
+    "days_remaining": {
+      "type": "number"
+    },
+    "domain": {
+      "type": "string"
+    },
+    "interpretation": {
+      "type": "string"
+    },
+    "next_step": {
+      "type": "string"
+    },
+    "next_step_url": {
+      "type": "string"
+    },
+    "risk_level": {
+      "type": "string"
+    },
+    "why_follow_up": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "computation_basis",
+    "days_remaining",
+    "domain",
+    "interpretation",
+    "next_step",
+    "next_step_url",
+    "risk_level",
+    "why_follow_up"
+  ],
+  "type": "object"
+}

Changed1 schema field changedJul 13, 2026
- addedInput schema / additionalProperties
```
Added value: +false
```
First observedJun 29, 2026

TDQS

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