SEO GSC Wizard MCP

Detect traffic change points

detect_change_points

Read-only

Finds the dates where a property's clicks or impressions shifted to a new sustained level (step changes / level shifts), reporting the before vs after average and the % change at each break. Unlike anomaly detection (one-off spikes), this locates durable regime changes: a migration, an algorithm update, a redesign. Each date is the day the shift is strongest (the first day of the new level). Days without rows count as zero, so a drop to zero (deindexing) is a change point; coverage reports how an empty tail at the end of the window was treated. Reads the ClickHouse warehouse when available, else the live Search Console API. When a shift starts from a zero baseline (beforeMean 0) it has no percentage: changePercent is 0 by convention, which does not mean no change; describe it as new traffic from zero using afterMean.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`days`	No	Trailing days of daily data to analyze (min 14, default 180).
`metric`	No	Which metric to segment.	clicks
`siteUrl`	Yes
`sensitivity`	No	Mean-shift threshold in std-devs: lower = more sensitive (more change points). Default 2.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`note`	No
`count`	No
`range`	No
`metric`	No
`siteUrl`	No
`coverage`	No
`dataSource`	No
`sensitivity`	No
`changePoints`	No
`dataMaturity`	No
`settledThrough`	No
`warehouseLatestDate`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 10, 2026

addedOutput schema / properties / coverage

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "calendarDays": {
+          "$ref": "#/properties/sensitivity"
+        },
+        "daysWithData": {
+          "$ref": "#/properties/sensitivity"
+        },
+        "firstDataDate": {
+          "$ref": "#/properties/siteUrl"
+        },
+        "lastDataDate": {
+          "$ref": "#/properties/siteUrl"
+        },
+        "trailingGap": {
+          "anyOf": [
+            {
+              "additionalProperties": false,
+              "properties": {
+                "lastDataDate": {
+                  "$ref": "#/properties/siteUrl"
+                },
+                "missingDays": {
+                  "$ref": "#/properties/sensitivity"
+                },
+                "note": {
+                  "$ref": "#/properties/siteUrl"
+                },
+                "status": {
+                  "$ref": "#/properties/siteUrl"
+                }
+              },
+              "type": "object"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "zeroFilledDays": {
+          "$ref": "#/properties/sensitivity"
+        }
+      },
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / warehouseLatestDate

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

First observedOct 7, 2026

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