I need to obtain several properties of all websites of a root site.
I am using:
http://xxxxxxx/_api/web/webinfos?$select=ServerRelativeUrl,Title,Description
With this url I get Description, Title and ServerRelativeUrl.
...
<content type="application/xml">
<m:properties>
<d:Description>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eg</d:Description>
<d:ServerRelativeUrl>/test</d:ServerRelativeUrl>
<d:Title>Site name</d:Title>
</m:properties>
</content>
...
<content type="application/xml">
<m:properties>
<d:Description>Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequa</d:Description>
<d:ServerRelativeUrl>/test2</d:ServerRelativeUrl>
<d:Title>Second Site name</d:Title>
</m:properties>
</content>
.....
But I can't get the url logo property for every website.
How I could obtain the url logo for all the first level websites from client side? (see resalted yellow text below)

You can use the below REST endpoint it is working at my end, I have tried it out in SP online