GitHub user BioQwer added a comment to the discussion: ExternalTaskSensor (only
for last dag runs) in Airflow 3
Hi everyone, I have a similar application and a similar problem.
I have many DAGs that run once a day but at different times.
We also queried the database to find out the start times in order to understand
the delta for the External Task Sensor.
This problem is a blocker for us since we have around 100 DAGs with
inter-dependencies. Figuring out the delta between each one is a massive
undertaking that could introduce many errors.
Now I understand how to get this from the API.
`/api/v2/dags`
i can get diff from `next_dagrun_logical_date`
```
{
"dags": [
{
"dag_id": "test",
"dag_display_name": "test",
"is_paused": true,
"is_stale": false,
"last_parsed_time": "2026-06-05T05:50:35.210927Z",
"last_parse_duration": 0.5269125308841467,
"last_expired": null,
"bundle_name": "dags-folder",
"description": "",
"timetable_summary": "00 21 * * 0",
"timetable_description": "At 21:00, only on Sunday",
"timetable_partitioned": false,
"next_dagrun_logical_date": "2026-05-31T18:00:00Z",
"next_dagrun_data_interval_start": "2026-05-31T18:00:00Z",
"next_dagrun_data_interval_end": "2026-05-31T18:00:00Z",
"next_dagrun_run_after": "2026-05-31T18:00:00Z",
"allowed_run_types": null,
...
},
```
But I have absolutely no idea how to obtain a technical client for the requests.
The client needs a token, but if it is running inside the scheduler, it already
has all the necessary data, tokens, and other things.
```python
from airflow.sdk.api.client import Client
class Client(httpx.Client):
def __init__(self, *, base_url: str | None, dry_run: bool = False, token:
str, **kwargs: Any):
...
```
It turns out we will be querying the time inside the scheduler.
There is a Local client, but its API is limited.
<img width="761" height="370" alt="image"
src="https://github.com/user-attachments/assets/163b0be3-62e6-4be7-a26a-af462fb758f0";
/>
Can you advise me on how to proceed correctly in this situation? Airflow
version 3.2.2.
GitHub link:
https://github.com/apache/airflow/discussions/49997#discussioncomment-17188652
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