diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..ebd0e2b
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,4 @@
+FEEDGEN_PORT=3000
+FEEDGEN_SQLITE_LOCATION=":memory:"
+FEEDGEN_SUBSCRIPTION_ENDPOINT="wss://bsky.social"
+FEEDGEN_SERVICE_DID="did:example:test"
diff --git a/src/index.ts b/src/index.ts
index 5974b40..a8486d7 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -7,6 +7,7 @@ const run = async () => {
     port: maybeInt(process.env.FEEDGEN_PORT),
     sqliteLocation: maybeStr(process.env.FEEDGEN_SQLITE_LOCATION),
     subscriptionEndpoint: maybeStr(process.env.FEEDGEN_SUBSCRIPTION_ENDPOINT),
+    serviceDid: maybeStr(process.env.FEEDGEN_SERVICE_DID),
   })
   await server.start()
   console.log(