diff --git a/litellm/proxy/agent_session_endpoints/serialization.py b/litellm/proxy/agent_session_endpoints/serialization.py
new file mode 100644
index 00000000000..368d4d74b96
--- /dev/null
+++ b/litellm/proxy/agent_session_endpoints/serialization.py
@@ -0,0 +1,107 @@
+"""
+Serialization helpers — Prisma row -> response Pydantic model.
+
+Prisma returns ``datetime`` objects and Json columns as Python native types
+already, so we just convert datetimes to ISO-8601 strings and pass JSON
+columns through. Centralized here so every endpoint serializes the same
+way (consistent timestamps in the SDK).
+"""
+
+from datetime import datetime
+from typing import Any, Dict, List, Optional
+
+from litellm.proxy.agent_session_endpoints.schemas import (
+    AgentResponse,
+    ConversationMessage,
+    RunResponse,
+    SessionResponse,
+)
+
+
+def _iso(value: Any) -> Optional[str]:
+    """Format a Prisma datetime as ISO-8601 (UTC); pass through strings."""
+    if value is None:
+        return None
+    if isinstance(value, datetime):
+        return value.isoformat()
+    return str(value)
+
+
+def _as_dict(value: Any) -> Optional[Dict[str, Any]]:
+    """Coerce Prisma JSON column into a dict (or ``None`` if missing)."""
+    if value is None:
+        return None
+    if isinstance(value, dict):
+        return value
+    return None
+
+
+def _as_list_of_dict(value: Any) -> List[Dict[str, Any]]:
+    if not value:
+        return []
+    if isinstance(value, list):
+        return [v for v in value if isinstance(v, dict)]
+    return []
+
+
+def agent_row_to_response(row: Any) -> AgentResponse:
+    return AgentResponse(
+        id=row.id,
+        name=row.name,
+        model=row.model,
+        system_prompt=row.system_prompt,
+        default_repos=_as_list_of_dict(row.default_repos) or None,
+        default_env_vars=_as_dict(row.default_env_vars),
+        tools_config=_as_dict(row.tools_config),
+        metadata=_as_dict(row.metadata),
+        team_id=row.team_id,
+        created_at=_iso(row.created_at),
+        updated_at=_iso(row.updated_at),
+    )
+
+
+def session_row_to_response(
+    row: Any,
+    daemon_token: Optional[str] = None,
+) -> SessionResponse:
+    return SessionResponse(
+        id=row.id,
+        agent_id=row.agent_id,
+        status=row.status,
+        vm_id=row.vm_id,
+        vm_provider=row.vm_provider,
+        repos=_as_list_of_dict(row.repos),
+        expires_at=_iso(row.expires_at),
+        last_heartbeat_at=_iso(row.last_heartbeat_at),
+        created_at=_iso(row.created_at),
+        updated_at=_iso(row.updated_at),
+        terminated_at=_iso(row.terminated_at),
+        daemon_token=daemon_token,
+    )
+
+
+def run_row_to_response(row: Any) -> RunResponse:
+    prompt = _as_dict(row.prompt) or {}
+    return RunResponse(
+        id=row.id,
+        session_id=row.session_id,
+        status=row.status,
+        prompt=prompt,
+        parent_run_id=row.parent_run_id,
+        result=row.result,
+        git_branches=_as_list_of_dict(row.git_branches) or None,
+        created_at=_iso(row.created_at),
+        updated_at=_iso(row.updated_at),
+        started_at=_iso(row.started_at),
+        terminated_at=_iso(row.terminated_at),
+    )
+
+
+def event_row_to_message(row: Any) -> ConversationMessage:
+    return ConversationMessage(
+        run_id=row.run_id,
+        seq=row.seq,
+        event_type=row.event_type,
+        payload=_as_dict(row.payload) or {},
+        created_at=_iso(row.created_at),
+    )