Why can't I filter by after using correct timestamp

[luisgustavom1]

What I'm doing wrong? The format timestamp is correctly?
I want get the activities in a range of 1 month
before = 1709383329531 // "2024-03-02T12:42:09.531Z"
after = 1706877451938 // "2024-02-02T12:37:31.938Z"

[ActivityFix · Accepted solution]

It looks like your timestamps are using milliseconds and Strava is interpreting them as seconds which is why the error you get says that the timestamp is in the future. Try sending your request with the last 3 digits of each timestamp removed (use timestamp/1000 or some other form of rounding/truncating)