diff --git a/envs/canary.env b/envs/canary.env
index fbf97b2643..96c2dd38e7 100644
--- a/envs/canary.env
+++ b/envs/canary.env
@@ -23,4 +23,8 @@ NYM_API=https://canary-api.performance.nymte.ch/api/
 NYXD_WS=wss://rpc.canary-validator.performance.nymte.ch/websocket
 NYM_VPN_API=https://nym-vpn-api-git-deploy-canary-nyx-network-staging.vercel.app/api/
 
-UPGRADE_MODE_ATTESTER_ED25519_PUBKEY=U1NXToPYUTsh7pYPLcwXCXwcL6pGoLUou7fyAJrNz8b
\ No newline at end of file
+UPGRADE_MODE_ATTESTER_ED25519_PUBKEY=U1NXToPYUTsh7pYPLcwXCXwcL6pGoLUou7fyAJrNz8b
+UPGRADE_MODE_ATTESTATION_URL=http://upgrade-mode.performance.nymte.ch/.wellknown/canary/attestation.json
+
+NYM_APIS=[{"url":"https://canary-api.performance.nymte.ch/api/","front_hosts":null},{"url":"https://nym-frontdoor.vercel.app/canary/nym-api/","front_hosts":["vercel.app","vercel.com"]}]
+NYM_VPN_APIS=[{"front_hosts":null},{"url":"https://nym-vpn-api-git-deploy-canary-nyx-network-staging.vercel.app/api/","front_hosts":["vercel.app","vercel.com"]},{"url":"https://nym-frontdoor.vercel.app/canary/nym-vpn-api/","front_hosts":["vercel.app","vercel.com"]}]
\ No newline at end of file
diff --git a/envs/sandbox.env b/envs/sandbox.env
index 96a46881dd..549947e440 100644
--- a/envs/sandbox.env
+++ b/envs/sandbox.env
@@ -24,4 +24,8 @@ NYXD_WS=wss://rpc.sandbox.nymtech.net/websocket
 NYM_API=https://sandbox-nym-api1.nymtech.net/api/
 NYM_VPN_API=https://nym-vpn-api-git-deploy-sandbox-nyx-network-staging.vercel.app/api/
 
-UPGRADE_MODE_ATTESTER_ED25519_PUBKEY=EGwzKXPrqStv8cHF68VT2LbQuEBGDPzhCAixScvybfem
\ No newline at end of file
+UPGRADE_MODE_ATTESTER_ED25519_PUBKEY=EGwzKXPrqStv8cHF68VT2LbQuEBGDPzhCAixScvybfem
+UPGRADE_MODE_ATTESTATION_URL=http://upgrade-mode.performance.nymte.ch/.wellknown/sandbox/attestation.json
+
+NYM_APIS=[{"url":"https://sandbox-nym-api1.nymtech.net/api/","front_hosts":null},{"url":"https://nym-frontdoor.vercel.app/sandbox/nym-api/","front_hosts":["vercel.app","vercel.com"]}]
+NYM_VPN_APIS=[{"front_hosts":null},{"url":"https://nym-vpn-api-git-deploy-sandbox-nyx-network-staging.vercel.app/api/","front_hosts":["vercel.app","vercel.com"]},{"url":"https://nym-frontdoor.vercel.app/sandbox/nym-vpn-api/","front_hosts":["vercel.app","vercel.com"]}]
\ No newline at end of file