diff --git a/packages/cli/src/telemetry/events.schema.json b/packages/cli/src/telemetry/events.schema.json
index 405f0240..0bd22bb3 100644
--- a/packages/cli/src/telemetry/events.schema.json
+++ b/packages/cli/src/telemetry/events.schema.json
@@ -144,6 +144,18 @@
         "errorClass"
       ]
     },
+    {
+      "name": "mongo_query_completed",
+      "description": "Emitted after ktx mongo-query completes validation and execution.",
+      "fields": [
+        "driver",
+        "isDemoConnection",
+        "stageCount",
+        "durationMs",
+        "outcome",
+        "errorClass"
+      ]
+    },
     {
       "name": "wiki_query_completed",
       "description": "Emitted after a wiki query completes.",
@@ -1056,6 +1068,77 @@
       ],
       "additionalProperties": false
     },
+    "mongo_query_completed": {
+      "$schema": "https://json-schema.org/draft/2020-12/schema",
+      "type": "object",
+      "properties": {
+        "cliVersion": {
+          "type": "string"
+        },
+        "nodeVersion": {
+          "type": "string"
+        },
+        "osPlatform": {
+          "type": "string"
+        },
+        "osRelease": {
+          "type": "string"
+        },
+        "arch": {
+          "type": "string"
+        },
+        "runtime": {
+          "type": "string",
+          "enum": [
+            "node",
+            "daemon-py"
+          ]
+        },
+        "isCi": {
+          "type": "boolean"
+        },
+        "driver": {
+          "type": "string"
+        },
+        "isDemoConnection": {
+          "type": "boolean"
+        },
+        "stageCount": {
+          "type": "integer",
+          "minimum": 0,
+          "maximum": 9007199254740991
+        },
+        "durationMs": {
+          "type": "number",
+          "minimum": 0
+        },
+        "outcome": {
+          "type": "string",
+          "enum": [
+            "ok",
+            "error"
+          ]
+        },
+        "errorClass": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "cliVersion",
+        "nodeVersion",
+        "osPlatform",
+        "osRelease",
+        "arch",
+        "runtime",
+        "isCi",
+        "driver",
+        "isDemoConnection",
+        "stageCount",
+        "durationMs",
+        "outcome"
+      ],
+      "additionalProperties": false
+    },
     "wiki_query_completed": {
       "$schema": "https://json-schema.org/draft/2020-12/schema",
       "type": "object",
diff --git a/packages/cli/src/telemetry/events.ts b/packages/cli/src/telemetry/events.ts
index 6d311ac5..84b8617b 100644
--- a/packages/cli/src/telemetry/events.ts
+++ b/packages/cli/src/telemetry/events.ts
@@ -146,6 +146,17 @@ const sqlCompletedSchema = telemetryCommonEnvelopeSchema
   })
   .strict();
 
+const mongoQueryCompletedSchema = telemetryCommonEnvelopeSchema
+  .extend({
+    driver: z.string(),
+    isDemoConnection: z.boolean(),
+    stageCount: z.number().int().nonnegative(),
+    durationMs: z.number().nonnegative(),
+    outcome: outcomeSchema,
+    errorClass: z.string().optional(),
+  })
+  .strict();
+
 const wikiQueryCompletedSchema = telemetryCommonEnvelopeSchema
   .extend({
     queryLength: z.number().int().nonnegative(),
@@ -230,6 +241,7 @@ export const telemetryEventSchemas = {
   sl_validate_completed: slValidateCompletedSchema,
   sl_query_completed: slQueryCompletedSchema,
   sql_completed: sqlCompletedSchema,
+  mongo_query_completed: mongoQueryCompletedSchema,
   wiki_query_completed: wikiQueryCompletedSchema,
   mcp_request_completed: mcpRequestCompletedSchema,
   daemon_started: daemonStartedSchema,
@@ -342,6 +354,11 @@ export const telemetryEventCatalog = [
       'errorClass',
     ],
   },
+  {
+    name: 'mongo_query_completed',
+    description: 'Emitted after ktx mongo-query completes validation and execution.',
+    fields: ['driver', 'isDemoConnection', 'stageCount', 'durationMs', 'outcome', 'errorClass'],
+  },
   {
     name: 'wiki_query_completed',
     description: 'Emitted after a wiki query completes.',
diff --git a/packages/cli/test/telemetry/events.test.ts b/packages/cli/test/telemetry/events.test.ts
index 033c2def..1ed5f1f1 100644
--- a/packages/cli/test/telemetry/events.test.ts
+++ b/packages/cli/test/telemetry/events.test.ts
@@ -31,6 +31,7 @@ describe('telemetry event schemas', () => {
       'sl_validate_completed',
       'sl_query_completed',
       'sql_completed',
+      'mongo_query_completed',
       'wiki_query_completed',
       'mcp_request_completed',
       'daemon_started',
diff --git a/python/ktx-daemon/src/ktx_daemon/telemetry/events.schema.json b/python/ktx-daemon/src/ktx_daemon/telemetry/events.schema.json
index 405f0240..0bd22bb3 100644
--- a/python/ktx-daemon/src/ktx_daemon/telemetry/events.schema.json
+++ b/python/ktx-daemon/src/ktx_daemon/telemetry/events.schema.json
@@ -144,6 +144,18 @@
         "errorClass"
       ]
     },
+    {
+      "name": "mongo_query_completed",
+      "description": "Emitted after ktx mongo-query completes validation and execution.",
+      "fields": [
+        "driver",
+        "isDemoConnection",
+        "stageCount",
+        "durationMs",
+        "outcome",
+        "errorClass"
+      ]
+    },
     {
       "name": "wiki_query_completed",
       "description": "Emitted after a wiki query completes.",
@@ -1056,6 +1068,77 @@
       ],
       "additionalProperties": false
     },
+    "mongo_query_completed": {
+      "$schema": "https://json-schema.org/draft/2020-12/schema",
+      "type": "object",
+      "properties": {
+        "cliVersion": {
+          "type": "string"
+        },
+        "nodeVersion": {
+          "type": "string"
+        },
+        "osPlatform": {
+          "type": "string"
+        },
+        "osRelease": {
+          "type": "string"
+        },
+        "arch": {
+          "type": "string"
+        },
+        "runtime": {
+          "type": "string",
+          "enum": [
+            "node",
+            "daemon-py"
+          ]
+        },
+        "isCi": {
+          "type": "boolean"
+        },
+        "driver": {
+          "type": "string"
+        },
+        "isDemoConnection": {
+          "type": "boolean"
+        },
+        "stageCount": {
+          "type": "integer",
+          "minimum": 0,
+          "maximum": 9007199254740991
+        },
+        "durationMs": {
+          "type": "number",
+          "minimum": 0
+        },
+        "outcome": {
+          "type": "string",
+          "enum": [
+            "ok",
+            "error"
+          ]
+        },
+        "errorClass": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "cliVersion",
+        "nodeVersion",
+        "osPlatform",
+        "osRelease",
+        "arch",
+        "runtime",
+        "isCi",
+        "driver",
+        "isDemoConnection",
+        "stageCount",
+        "durationMs",
+        "outcome"
+      ],
+      "additionalProperties": false
+    },
     "wiki_query_completed": {
       "$schema": "https://json-schema.org/draft/2020-12/schema",
       "type": "object",
diff --git a/python/ktx-daemon/tests/test_telemetry_schema_sync.py b/python/ktx-daemon/tests/test_telemetry_schema_sync.py
index 0cc822f9..21c076cd 100644
--- a/python/ktx-daemon/tests/test_telemetry_schema_sync.py
+++ b/python/ktx-daemon/tests/test_telemetry_schema_sync.py
@@ -30,6 +30,7 @@ def test_python_schema_copy_matches_node_schema() -> None:
         "sl_validate_completed",
         "sl_query_completed",
         "sql_completed",
+        "mongo_query_completed",
         "wiki_query_completed",
         "mcp_request_completed",
         "daemon_started",