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Thanks for the response! And thanks for the advice!

I don't think the difference I observed came from rounding because it varied quite more than the difference of rounding range!

For instance, in the domain of "yyxysh.com", I observed UPA as 17 directly via OSE. On the other hand, API output UPA as 21.1856379084366.
In another case, in the domain of "zaegi.com", I confirmed 27 via OSE in contrast to 13.3390259088872 via API.

I assume such a difference doesn't come from a time lag because API refreshes the current values such as UPA within 1 hour before or after OSE refreshes.
I found about 50% of samples encountered such a value difference after my investigation for a few days.

Therefore, I hope you would give me additional advice or cause about the phenomenon.
Thank you very much for your help in advance.

When I check the two parameters (PA and DA values) actually, these values often differ from those which I receive from your API.
Why does it happen?

When I check the two parameters (PA and DA values) actually, these values often differ from those which I receive from your API.
Why does it happen?

Thanks for the response! And thanks for the advice!