---
title: "Where do I find my APOLLO_GRAPH_REF environmental variable?"
canonical: "https://support.apollographql.com/space/ETKB/648052776/Where%20do%20I%20find%20my%20APOLLO_GRAPH_REF%20environmental%20variable%3F"
format: markdown
---
To use Apollo Studio, you must first provide your server with an `APOLLO_GRAPH_REF` environmental variable. You can find the `APOLLO_GRAPH_REF` for a graph in Studio on that graph's homepage:


![image-20240604-164249.png](media://d6ba5eb9-ae0f-4935-a565-1d3ecbf46e39)

Every graph ref is a string with the format:`graph-id@variant`.