The difference between api value and screen value

[orange002]

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?

[orange002]

Thanks for the response! And thanks for the advice!

[Mobilio]

Redirects:
yyxysh.com -> DA=8; UPA = 17 in OSE, API {"pda":7.946532082305239,"upa":16.535296818533226}
www.yyxysh.com -> DA=8; UPA=21; {"pda":7.946532082305239,"upa":21.185637908436604}

zaegi.com -> 17/27; {"pda":17.31598169835115,"upa":27.430491280580874}
www.zaegi.com -> 17/13; {"pda":17.31598169835115,"upa":13.339025908887258}

As you can see API and OSE works. But checking different domain screw test. Please check your software did add "www" in beginning of checks? Because mine tests shows that it ADD it.

If you have Mac then you can use mine SEOAuditor very small app that return few important metrics:
http://www.mobiliodevelopment.com/seoauditor/
Actual API examples are from it. I just enable "debug log" to get raw results.

[orange002]

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.

[Mobilio]

Dev that use API here.

Yes - they're different sometimes because rounding. In OSE you get numbers as PDA 25.294393094636707 and UPA 36.15102264746345. And Moz OSE round them to 25 and 36. This is ok. But on mine other site bgdn.net as response get{"pda":22.949587785824708,"upa":27.22655880092715}. OSE shows 23 and 27.

If you post some URL with difference here we can debug and see difference.