diff --git a/main/main.tf b/main/main.tf
index 2de5c56..432e2d3 100644
--- a/main/main.tf
+++ b/main/main.tf
@@ -18,7 +18,6 @@ module "stack" {
   chain_trace_endpoint     = "${var.chain_trace_endpoint}"
   chain_ws_endpoint        = "${var.chain_ws_endpoint}"
   chain_logo               = "${var.chain_logo}"
-  chain_check_origin       = "${var.chain_check_origin}"
   chain_coin               = "${var.chain_coin}"
   chain_network            = "${var.chain_network}"
   chain_subnetwork         = "${var.chain_subnetwork}"
diff --git a/main/variables.tf b/main/variables.tf
index 8239ea0..b8f38ef 100644
--- a/main/variables.tf
+++ b/main/variables.tf
@@ -36,58 +36,71 @@ variable "root_block_size" {
 variable "chains" {
   description = "A map of chain names to urls"
   default = {
-    "sokol" = "https://sokol.poa.network"
+    "sokol" = "https://sokol-trace.poa.network"
+  }
+}
+
+variable "chain_trace_endpoint" {
+  description = "A map of chain names to RPC tracing endpoint"
+  default = {
+    "sokol" = "https://sokol-trace.poa.network"
+  }
+}
+
+variable "chain_ws_endpoint" {
+  description = "A map of chain names to Websocket RPC Endpoint"
+  default = {
+    "sokol" = "wss://sokol-ws.poa.network/ws"
   }
 }
 
 variable "chain_jsonrpc_variant" {
-  description = "The chain JSON RPC variant"
-  default = "parity"
-}
-
-variable "chain_trace_endpoint" {
-  description = "A RPC tracing RPC endpoint"
-  default = "https://sokol-trace.poa.network"
-}
-
-variable "chain_ws_endpoint" {
-  description = "A Websocket RPC Endpoint for the chain"
-  default = "wss://sokol-ws.poa.network/ws"
+  description = "A map of chain names to JSON RPC variant"
+  default = {
+    "sokol" = "parity"
+  }
 }
 
 variable "chain_logo" {
-  description = "The logo url for the chain"
-  default = "/images/sokol_logo.svg"
-}
-
-variable "chain_check_origin" {
-  description = "The chain names to the check_origin configuration"
-  default = "false"
+  description = "A map of chain names to logo url"
+  default = {
+    "sokol" = "/images/sokol_logo.svg"
+  }
 }
 
 variable "chain_coin" {
-  description = "The coin symbol"
-  default = "POA"
+  description = "A map of chain name to coin symbol"
+  default = {
+    "sokol" = "POA"
+  }
 }
 
 variable "chain_network" {
-  description = "The network name"
-  default = "POA Network"
+  description = "A map of chain names to network name"
+  default = {
+    "sokol" = "POA Network"
+  }
 }
 
 variable "chain_subnetwork" {
-  description = "The subnetwork name"
-  default = "Sokol Testnet"
+  description = "A map of chain names to subnetwork name"
+  default = {
+    "sokol" = "Sokol Testnet"
+  }
 }
 
 variable "chain_network_path" {
-  description = "The network name path"
-  default = "/poa/sokol"
+  description = "A map of chain names to network name path"
+  default = {
+    "sokol" = "/poa/sokol"
+  }
 }
 
 variable "chain_network_icon" {
-  description = "The network navigation icon"
-  default = "_test_network_icon.html"
+  description = "A map of chain names to network navigation icon"
+  default = {
+    "sokol" = "_test_network_icon.html"
+  }
 }
 
 # RDS/Database configuration
diff --git a/modules/stack/config.tf b/modules/stack/config.tf
index ca372b8..87d470b 100644
--- a/modules/stack/config.tf
+++ b/modules/stack/config.tf
@@ -29,7 +29,7 @@ resource "aws_ssm_parameter" "ecto_use_ssl" {
 resource "aws_ssm_parameter" "ethereum_jsonrpc_variant" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/ethereum_jsonrpc_variant"
-  value = "${var.chain_jsonrpc_variant}"
+  value = "${element(values(var.chain_jsonrpc_variant),count.index)}"
   type  = "String"
 }
 resource "aws_ssm_parameter" "ethereum_url" {
@@ -42,62 +42,55 @@ resource "aws_ssm_parameter" "ethereum_url" {
 resource "aws_ssm_parameter" "trace_url" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/trace_url"
-  value = "${var.chain_trace_endpoint}"
+  value = "${element(values(var.chain_trace_endpoint),count.index)}"
   type  = "String"
 }
 resource "aws_ssm_parameter" "ws_url" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/ws_url"
-  value = "${var.chain_ws_endpoint}"
+  value = "${element(values(var.chain_ws_endpoint),count.index)}"
   type  = "String"
 }
 
 resource "aws_ssm_parameter" "logo" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/logo"
-  value = "${var.chain_logo}"
-  type  = "String"
-}
-
-resource "aws_ssm_parameter" "check_origin" {
-  count = "${length(var.chains)}"
-  name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/check_origin"
-  value = "${var.chain_check_origin}"
+  value = "${element(values(var.chain_logo),count.index)}"
   type  = "String"
 }
 
 resource "aws_ssm_parameter" "coin" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/coin"
-  value = "${var.chain_coin}"
+  value = "${element(values(var.chain_coin),count.index)}"
   type  = "String"
 }
 
 resource "aws_ssm_parameter" "network" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/network"
-  value = "${var.chain_network}"
+  value = "${element(values(var.chain_network),count.index)}"
   type  = "String"
 }
 
 resource "aws_ssm_parameter" "subnetwork" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/subnetwork"
-  value = "${var.chain_subnetwork}"
+  value = "${element(values(var.chain_subnetwork),count.index)}"
   type  = "String"
 }
 
 resource "aws_ssm_parameter" "network_path" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/network_path"
-  value = "${var.chain_network_path}"
+  value = "${element(values(var.chain_network_path),count.index)}"
   type  = "String"
 }
 
 resource "aws_ssm_parameter" "network_icon" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/network_icon"
-  value = "${var.chain_network_icon}"
+  value = "${element(values(var.chain_network_icon),count.index)}"
   type  = "String"
 }
 
diff --git a/modules/stack/hosts.tf b/modules/stack/hosts.tf
index b58ffcf..09521c2 100644
--- a/modules/stack/hosts.tf
+++ b/modules/stack/hosts.tf
@@ -86,6 +86,8 @@ resource "aws_autoscaling_group" "explorer" {
     "aws_ssm_parameter.db_port",
     "aws_ssm_parameter.ethereum_url",
     "aws_ssm_parameter.trace_url",
+    "aws_ssm_parameter.ws_url",
+    "aws_ssm_parameter.network_path",
   ]
 
   lifecycle {
diff --git a/modules/stack/variables.tf b/modules/stack/variables.tf
index 5f6dff3..403fe1f 100644
--- a/modules/stack/variables.tf
+++ b/modules/stack/variables.tf
@@ -8,19 +8,36 @@ variable "dns_zone_name" {}
 variable "instance_type" {}
 variable "root_block_size" {}
 
-variable "chain_jsonrpc_variant" {}
+variable "chain_jsonrpc_variant" {
+  default = {}
+}
 variable "chains" {
   default = {}
 }
-variable "chain_trace_endpoint" {}
-variable "chain_ws_endpoint" {}
-variable "chain_logo" {}
-variable "chain_check_origin" {}
-variable "chain_coin" {}
-variable "chain_network" {}
-variable "chain_subnetwork" {}
-variable "chain_network_path" {}
-variable "chain_network_icon" {}
+variable "chain_trace_endpoint" {
+  default = {}
+}
+variable "chain_ws_endpoint" {
+  default = {}
+}
+variable "chain_logo" {
+  default = {}
+}
+variable "chain_coin" {
+  default = {}
+}
+variable "chain_network" {
+  default = {}
+}
+variable "chain_subnetwork" {
+  default = {}
+}
+variable "chain_network_path" {
+  default = {}
+}
+variable "chain_network_icon" {
+  default = {}
+}
 
 variable "db_id" {}
 variable "db_name" {}