If you use Gisgraphy, you have to specify the following attributions via a link to Gisgraphy :
Here is the code to be included in your app, software, site or whatever.
Powered by <a href="https://www.gisgraphy.com/" alt="Powered by Gisgraphy" >Gisgraphy API</a>
Gisgraphy uses several databases and softwares under the hood. Some services or data sources attributions have to be mentioned too