diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ef89fa0..6c96ae59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,8 @@ Changes are grouped as follows
 * In the `unstable` package: New `Extractor.get_log_upload_data_set_id()` hook that tells the built-in `fetch_logs` action which data set to upload log files into. Resolution order: integration "data domains" field (not available yet, marked TODO), then the extractor's own configured data set, then no data set. The default uses `application_config.data_set` when the config derives from `WithDataSetId` and otherwise returns `None`; extractors that keep their data set elsewhere (for example the File and DB extractors) should override it in their own repositories.
 
 ### Changed
+* In the `unstable` package: The maximum number of available actions sent at startup is raised from 100 to 250, so an extractor with up to 100 actionable tasks (a start and a stop action each) plus custom actions can register. Requires an Odin version with the same limit (EDG-1049).
+
 * In the `unstable` package: `fetch_logs` now uploads a new copy of the log files on every invocation instead of overwriting: the file external ID is now `extractor-logs-<integration>-<date>-<action external id>` (the `extractor-logs-<integration>-<date>` prefix is unchanged). The per-file status `skipped` for a date without a log file is now called `missing`, matching the existing `missing_files` counter (all counter keys are unchanged). When no file was uploaded at all the action now ends as `completed_with_errors` with the message "No log files were uploaded ..." instead of `succeeded`. Custom actions can end as `completed_with_errors` with `ActionContext.set_result(..., completed_with_errors=True)`.
 * In the `unstable` package: `Stop <task>` actions now stay `running` until the task has actually ended and only then report `succeeded`. If the task has not ended within 300 seconds (`STOP_TASK_ACTION_TIMEOUT_SECONDS`) the action is reported as `failed` ("Task '<name>' did not stop within 300 seconds"); a waiting Stop is reported as `canceled` on extractor shutdown.
 
diff --git a/cognite/extractorutils/unstable/core/_dto.py b/cognite/extractorutils/unstable/core/_dto.py
index 09ad510f..c2b7b2c1 100644
--- a/cognite/extractorutils/unstable/core/_dto.py
+++ b/cognite/extractorutils/unstable/core/_dto.py
@@ -196,7 +196,9 @@ def validate_status(cls, v: ActionStatus) -> ActionStatus:
         return v
 
 
-AvailableActionList = Annotated[list[AvailableActionWrite], Len(min_length=0, max_length=100)]
+# Each actionable task registers a start and a stop action; keep in sync with the Odin limit.
+MAX_AVAILABLE_ACTIONS = 250
+AvailableActionList = Annotated[list[AvailableActionWrite], Len(min_length=0, max_length=MAX_AVAILABLE_ACTIONS)]
 ActionUpdateList = Annotated[list[ActionUpdate], Len(min_length=0, max_length=100)]
 
 
diff --git a/tests/test_unstable/test_action_registration.py b/tests/test_unstable/test_action_registration.py
index 153aaf8b..1ff1f95c 100644
--- a/tests/test_unstable/test_action_registration.py
+++ b/tests/test_unstable/test_action_registration.py
@@ -4,8 +4,9 @@
 from unittest.mock import MagicMock
 
 import pytest
+from pydantic import ValidationError
 
-from cognite.extractorutils.unstable.core._dto import ActionType, StartupRequest
+from cognite.extractorutils.unstable.core._dto import MAX_AVAILABLE_ACTIONS, ActionType, StartupRequest
 from cognite.extractorutils.unstable.core.actions import CustomAction
 from cognite.extractorutils.unstable.core.base import Extractor, FullConfig
 from cognite.extractorutils.unstable.core.tasks import ContinuousTask, ScheduledTask, StartupTask, TaskContext
@@ -212,3 +213,20 @@ def target(_: TaskContext) -> None:
         time.sleep(0.005)
 
     assert extractor._running_task_tokens.get("the-task") is replacement
+
+
+def test_startup_request_accepts_two_actions_per_task_at_odin_task_limit() -> None:
+    extractor = _make_extractor()
+    for i in range(100):
+        extractor.add_task(ScheduledTask.from_interval(interval="1h", name=f"task-{i}", target=lambda _: None))
+    actions = _startup_request(extractor).available_actions
+    assert actions is not None
+    assert len(actions) >= 200
+
+
+def test_startup_request_rejects_more_than_max_available_actions() -> None:
+    extractor = _make_extractor()
+    for i in range(MAX_AVAILABLE_ACTIONS):
+        extractor.add_task(ScheduledTask.from_interval(interval="1h", name=f"task-{i}", target=lambda _: None))
+    with pytest.raises(ValidationError):
+        _startup_request(extractor)
diff --git a/tests/test_unstable/test_dto.py b/tests/test_unstable/test_dto.py
index 64e975db..63256bf5 100644
--- a/tests/test_unstable/test_dto.py
+++ b/tests/test_unstable/test_dto.py
@@ -2,6 +2,7 @@
 from pydantic import ValidationError
 
 from cognite.extractorutils.unstable.core._dto import (
+    MAX_AVAILABLE_ACTIONS,
     MAX_MESSAGE_LENGTH,
     MAX_METADATA_VALUE_BYTES,
     Action,
@@ -99,11 +100,13 @@ def test_startup_request_available_actions_none_excluded() -> None:
 
 
 def test_startup_request_available_actions_max_length_enforced() -> None:
-    with pytest.raises(ValidationError, match="at most 100"):
+    with pytest.raises(ValidationError, match=f"at most {MAX_AVAILABLE_ACTIONS}"):
         StartupRequest(
             external_id="x",
             extractor=ExtractorInfo(external_id="x"),
-            available_actions=[AvailableActionWrite(name=f"a{i}", type=ActionType.custom) for i in range(101)],
+            available_actions=[
+                AvailableActionWrite(name=f"a{i}", type=ActionType.custom) for i in range(MAX_AVAILABLE_ACTIONS + 1)
+            ],
         )