diff --git a/api/chalicelib/core/custom_metrics.py b/api/chalicelib/core/custom_metrics.py
index 15c2ffc49..7c6311b75 100644
--- a/api/chalicelib/core/custom_metrics.py
+++ b/api/chalicelib/core/custom_metrics.py
@@ -57,6 +57,8 @@ def merged_live(project_id, data: schemas.TryCustomMetricsPayloadSchema):
 def __merge_metric_with_data(metric, data: Union[schemas.CustomMetricChartPayloadSchema,
                                                  schemas.CustomMetricSessionsPayloadSchema]) \
         -> Union[schemas.CreateCustomMetricsSchema, None]:
+    if data.series is not None and len(data.series) > 0:
+        metric["series"] = data.series
     metric: schemas.CreateCustomMetricsSchema = schemas.CreateCustomMetricsSchema.parse_obj({**data.dict(), **metric})
     if len(data.filters) > 0 or len(data.events) > 0:
         for s in metric.series:
diff --git a/api/schemas.py b/api/schemas.py
index b01553cc8..07455eb72 100644
--- a/api/schemas.py
+++ b/api/schemas.py
@@ -806,6 +806,7 @@ class TimeseriesMetricOfType(str, Enum):
 class CustomMetricSessionsPayloadSchema(FlatSessionsSearch):
     startTimestamp: int = Field(TimeUTC.now(-7))
     endTimestamp: int = Field(TimeUTC.now())
+    series: Optional[List[CustomMetricCreateSeriesSchema]] = Field(default=None)
 
     class Config:
         alias_generator = attribute_to_camel_case