diff --git a/services/o11y/pipelines/api-metrics-schema.json b/services/o11y/pipelines/api-metrics-schema.json
index 8685ecf59f..94935145aa 100644
--- a/services/o11y/pipelines/api-metrics-schema.json
+++ b/services/o11y/pipelines/api-metrics-schema.json
@@ -6,6 +6,7 @@
     { "name": "is_error", "type": "bool", "required": true },
     { "name": "inference_provider", "type": "string", "required": false },
     { "name": "user_byok", "type": "bool", "required": true },
+    { "name": "kilo_user_id", "type": "string", "required": true },
     { "name": "ttfb_ms", "type": "int64", "required": true },
     { "name": "complete_request_ms", "type": "int64", "required": true },
     { "name": "status_code", "type": "int32", "required": true },
diff --git a/services/o11y/src/o11y-analytics.ts b/services/o11y/src/o11y-analytics.ts
index 0a3a3b9644..10833a6ed0 100644
--- a/services/o11y/src/o11y-analytics.ts
+++ b/services/o11y/src/o11y-analytics.ts
@@ -15,6 +15,7 @@ type ApiMetricsParams = z.infer<typeof ApiMetricsParamsSchema>;
  *   blob4   = "1" if error (statusCode >= 400), "0" otherwise
  *   blob5   = inferenceProvider (best-effort)
  *   blob6   = "1" if userByok, "0" otherwise
+ *   blob7   = kiloUserId
  *   double1 = ttfbMs
  *   double2 = completeRequestMs
  *   double3 = statusCode
@@ -36,6 +37,7 @@ export function writeApiMetricsDataPoint(
       isError ? '1' : '0',
       params.inferenceProvider,
       params.userByok ? '1' : '0',
+      params.kiloUserId,
     ],
     doubles: [params.ttfbMs, params.completeRequestMs, params.statusCode],
   });
@@ -52,6 +54,7 @@ export function writeApiMetricsDataPoint(
         is_error: isError,
         inference_provider: params.inferenceProvider,
         user_byok: params.userByok,
+        kilo_user_id: params.kiloUserId,
         ttfb_ms: params.ttfbMs,
         complete_request_ms: params.completeRequestMs,
         status_code: params.statusCode,