diff --git a/engineapi/alembic/versions/4f05d212ea49_live_at_for_metatx.py b/engineapi/alembic/versions/6d07739cb13e_live_at_for_metatx.py
similarity index 67%
rename from engineapi/alembic/versions/4f05d212ea49_live_at_for_metatx.py
rename to engineapi/alembic/versions/6d07739cb13e_live_at_for_metatx.py
index 04224d0d..5db963d4 100644
--- a/engineapi/alembic/versions/4f05d212ea49_live_at_for_metatx.py
+++ b/engineapi/alembic/versions/6d07739cb13e_live_at_for_metatx.py
@@ -1,8 +1,8 @@
 """Live at for metatx
 
-Revision ID: 4f05d212ea49
-Revises: 040f2dfde5a5
-Create Date: 2023-10-03 10:00:09.730620
+Revision ID: 6d07739cb13e
+Revises: cc80e886e153
+Create Date: 2023-12-06 14:33:04.814144
 
 """
 from alembic import op
@@ -10,15 +10,15 @@ import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.
-revision = '4f05d212ea49'
-down_revision = '040f2dfde5a5'
+revision = '6d07739cb13e'
+down_revision = 'cc80e886e153'
 branch_labels = None
 depends_on = None
 
 
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.add_column('call_requests', sa.Column('live_at', sa.DateTime(timezone=True), server_default=sa.text("TIMEZONE('utc', statement_timestamp())"), nullable=False))
+    op.add_column('call_requests', sa.Column('live_at', sa.DateTime(timezone=True), nullable=True))
     # ### end Alembic commands ###
 
 
diff --git a/engineapi/engineapi/contracts_actions.py b/engineapi/engineapi/contracts_actions.py
index 6cab6912..e1c39e29 100644
--- a/engineapi/engineapi/contracts_actions.py
+++ b/engineapi/engineapi/contracts_actions.py
@@ -5,7 +5,7 @@ import uuid
 from datetime import datetime, timedelta
 from typing import Any, Dict, List, Optional, Tuple
 
-from sqlalchemy import func, text
+from sqlalchemy import func, or_, text
 from sqlalchemy.dialects.postgresql import insert
 from sqlalchemy.engine import Row
 from sqlalchemy.exc import IntegrityError, NoResultFound
@@ -413,7 +413,7 @@ def create_request_calls(
             request_id=specification.request_id,
             parameters=specification.parameters,
             expires_at=expires_at,
-            live_at=datetime.fromtimestamp(live_at),
+            live_at=datetime.fromtimestamp(live_at) if live_at is not None else None,
         )
 
         db_session.add(request)
@@ -484,7 +484,10 @@ def list_call_requests(
     metatx_requester_id: Optional[uuid.UUID] = None,
 ) -> List[Row[Tuple[CallRequest, RegisteredContract, CallRequestType]]]:
     """
-    List call requests for the given moonstream_user_id
+    List call requests.
+
+    Argument moonstream_user_id took from authorization workflow. And if it is specified
+    then user has access to call_requests before live_at param.
     """
     if caller is None:
         raise ValueError("caller must be specified")
@@ -525,11 +528,11 @@ def list_call_requests(
         )
         if not show_before_live_at:
             query = query.filter(
-                CallRequest.live_at < func.now(),
+                or_(CallRequest.live_at < func.now(), CallRequest.live_at == None)
             )
     else:
         query = query.filter(
-            CallRequest.live_at < func.now(),
+            or_(CallRequest.live_at < func.now(), CallRequest.live_at == None)
         )
 
     if offset is not None:
diff --git a/engineapi/engineapi/data.py b/engineapi/engineapi/data.py
index ed4941cb..aa15795d 100644
--- a/engineapi/engineapi/data.py
+++ b/engineapi/engineapi/data.py
@@ -307,7 +307,7 @@ class CallRequestResponse(BaseModel):
     request_id: str
     parameters: Dict[str, Any]
     expires_at: Optional[datetime] = None
-    live_at: datetime
+    live_at: Optional[datetime] = None
     created_at: datetime
     updated_at: datetime
 
diff --git a/engineapi/engineapi/models.py b/engineapi/engineapi/models.py
index cc5b68ca..f1532a3d 100644
--- a/engineapi/engineapi/models.py
+++ b/engineapi/engineapi/models.py
@@ -316,7 +316,7 @@ class CallRequest(Base):
     parameters = Column(JSONB, nullable=False)
 
     expires_at = Column(DateTime(timezone=True), nullable=True, index=True)
-    live_at = Column(DateTime(timezone=True), server_default=utcnow(), nullable=False)
+    live_at = Column(DateTime(timezone=True), nullable=True)
 
     created_at = Column(
         DateTime(timezone=True), server_default=utcnow(), nullable=False