feat(client): Add optional timestamp parameter to score creation methods

langfuse/_client/client.py

@@ -1972,6 +1972,7 @@ def create_score(
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
         metadata: Optional[Any] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None: ...
 
     @overload
@@ -1989,6 +1990,7 @@ def create_score(
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
         metadata: Optional[Any] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None: ...
 
     def create_score(
@@ -2005,6 +2007,7 @@ def create_score(
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
         metadata: Optional[Any] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None:
         """Create a score for a specific trace or observation.
 
@@ -2023,6 +2026,7 @@ def create_score(
             comment: Optional comment or explanation for the score
             config_id: Optional ID of a score config defined in Langfuse
             metadata: Optional metadata to be attached to the score
+            timestamp: Optional timestamp for the score (defaults to current UTC time)
 
         Example:
             ```python
@@ -2069,7 +2073,7 @@ def create_score(
             event = {
                 "id": self.create_trace_id(),
                 "type": "score-create",
-                "timestamp": _get_timestamp(),
+                "timestamp": timestamp or _get_timestamp(),
                 "body": new_body,
             }
 

langfuse/_client/span.py

@@ -276,6 +276,7 @@ def score(
         data_type: Optional[Literal["NUMERIC", "BOOLEAN"]] = None,
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None: ...
 
     @overload
@@ -288,6 +289,7 @@ def score(
         data_type: Optional[Literal["CATEGORICAL"]] = "CATEGORICAL",
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None: ...
 
     def score(
@@ -299,6 +301,7 @@ def score(
         data_type: Optional[ScoreDataType] = None,
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None:
         """Create a score for this specific span.
 
@@ -312,6 +315,7 @@ def score(
             data_type: Type of score (NUMERIC, BOOLEAN, or CATEGORICAL)
             comment: Optional comment or explanation for the score
             config_id: Optional ID of a score config defined in Langfuse
+            timestamp: Optional timestamp for the score (defaults to current UTC time)
 
         Example:
             ```python
@@ -337,6 +341,7 @@ def score(
             data_type=cast(Literal["CATEGORICAL"], data_type),
             comment=comment,
             config_id=config_id,
+            timestamp=timestamp,
         )
 
     @overload
@@ -349,6 +354,7 @@ def score_trace(
         data_type: Optional[Literal["NUMERIC", "BOOLEAN"]] = None,
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None: ...
 
     @overload
@@ -361,6 +367,7 @@ def score_trace(
         data_type: Optional[Literal["CATEGORICAL"]] = "CATEGORICAL",
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None: ...
 
     def score_trace(
@@ -372,6 +379,7 @@ def score_trace(
         data_type: Optional[ScoreDataType] = None,
         comment: Optional[str] = None,
         config_id: Optional[str] = None,
+        timestamp: Optional[datetime] = None,
     ) -> None:
         """Create a score for the entire trace that this span belongs to.
 
@@ -386,6 +394,7 @@ def score_trace(
             data_type: Type of score (NUMERIC, BOOLEAN, or CATEGORICAL)
             comment: Optional comment or explanation for the score
             config_id: Optional ID of a score config defined in Langfuse
+            timestamp: Optional timestamp for the score (defaults to current UTC time)
 
         Example:
             ```python
@@ -410,6 +419,7 @@ def score_trace(
             data_type=cast(Literal["CATEGORICAL"], data_type),
             comment=comment,
             config_id=config_id,
+            timestamp=timestamp,
         )
 
     def _set_processed_span_attributes(

tests/test_core_sdk.py

@@ -1,7 +1,7 @@
 import os
 import time
 from asyncio import gather
-from datetime import datetime, timezone
+from datetime import datetime, timedelta, timezone
 from time import sleep
 
 import pytest
@@ -257,6 +257,60 @@ def test_create_categorical_score():
     assert trace["scores"][0]["stringValue"] == "high score"
 
 
+def test_create_score_with_custom_timestamp():
+    langfuse = Langfuse()
+    api_wrapper = LangfuseAPI()
+
+    # Create a span and set trace properties
+    with langfuse.start_as_current_span(name="test-span") as span:
+        span.update_trace(
+            name="test-custom-timestamp",
+            user_id="test",
+            metadata="test",
+        )
+        # Get trace ID for later use
+        trace_id = span.trace_id
+
+    # Ensure data is sent
+    langfuse.flush()
+    sleep(2)
+
+    custom_timestamp = datetime.now(timezone.utc) - timedelta(hours=1)
+    score_id = create_uuid()
+    langfuse.create_score(
+        score_id=score_id,
+        trace_id=trace_id,
+        name="custom-timestamp-score",
+        value=0.85,
+        data_type="NUMERIC",
+        timestamp=custom_timestamp,
+    )
+
+    # Ensure data is sent
+    langfuse.flush()
+    sleep(2)
+
+    # Retrieve and verify
+    trace = api_wrapper.get_trace(trace_id)
+
+    assert trace["scores"][0]["id"] == score_id
+    assert trace["scores"][0]["dataType"] == "NUMERIC"
+    assert trace["scores"][0]["value"] == 0.85
+
+    # Verify timestamp is close to our custom timestamp
+    # Parse the timestamp from the API response
+    response_timestamp = datetime.fromisoformat(
+        trace["scores"][0]["timestamp"].replace("Z", "+00:00")
+    )
+
+    # Check that the timestamps are within 1 second of each other
+    # (allowing for some processing time and rounding)
+    time_diff = abs((response_timestamp - custom_timestamp).total_seconds())
+    assert time_diff < 1, (
+        f"Timestamp difference too large: {time_diff}s. Expected < 1s. Custom: {custom_timestamp}, Response: {response_timestamp}"
+    )
+
+
 def test_create_trace():
     langfuse = Langfuse()
     trace_name = create_uuid()