diff --git a/.env.template b/.env.template
index 60c7ae1603..778029a711 100644
--- a/.env.template
+++ b/.env.template
@@ -52,6 +52,7 @@ NEXT_PUBLIC_API_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_HOST__
 NEXT_PUBLIC_API_BASE_PATH=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_BASE_PATH__
 NEXT_PUBLIC_API_PROTOCOL=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_PROTOCOL__
 NEXT_PUBLIC_API_PORT=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_PORT__
+NEXT_PUBLIC_API_WEBSOCKET_PROTOCOL=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_WEBSOCKET_PROTOCOL__
 NEXT_PUBLIC_STATS_API_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_STATS_API_HOST__
 NEXT_PUBLIC_VISUALIZE_API_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_VISUALIZE_API_HOST__
 NEXT_PUBLIC_API_SPEC_URL=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_SPEC_URL__
diff --git a/configs/app/config.ts b/configs/app/config.ts
index 7271b3d4f9..611eba183a 100644
--- a/configs/app/config.ts
+++ b/configs/app/config.ts
@@ -45,6 +45,8 @@ const apiEndpoint = apiHost ? [
   apiPort && ':' + apiPort,
 ].filter(Boolean).join('') : 'https://blockscout.com';
 
+const socketSchema = getEnvValue(process.env.NEXT_PUBLIC_API_WEBSOCKET_PROTOCOL) || 'wss';
+
 const logoutUrl = (() => {
   try {
     const envUrl = getEnvValue(process.env.NEXT_PUBLIC_LOGOUT_URL);
@@ -120,7 +122,7 @@ const config = Object.freeze({
   api: {
     host: apiHost,
     endpoint: apiEndpoint,
-    socket: apiHost ? `wss://${ apiHost }` : 'wss://blockscout.com',
+    socket: apiHost ? `${ socketSchema }://${ apiHost }` : 'wss://blockscout.com',
     basePath: stripTrailingSlash(getEnvValue(process.env.NEXT_PUBLIC_API_BASE_PATH) || ''),
   },
   L2: {
diff --git a/docs/ENVS.md b/docs/ENVS.md
index 502cd74a9c..981fd8d7e0 100644
--- a/docs/ENVS.md
+++ b/docs/ENVS.md
@@ -121,8 +121,10 @@ For each application, you need to specify the `MarketplaceCategoryId` to which i
 
 | Variable | Type| Description | Is required  | Default value | Example value |
 | --- | --- | --- | --- | --- | --- |
+| NEXT_PUBLIC_API_PROTOCOL | `http \| https` | Main API protocol | - | `https` | `http` |
 | NEXT_PUBLIC_API_HOST | `string` | Main API host | - | `blockscout.com` | `my-host.com` |
 | NEXT_PUBLIC_API_BASE_PATH | `string` | Base path for Main API endpoint url | - | - | `/poa/core` |
+| NEXT_PUBLIC_API_WEBSOCKET_PROTOCOL | `ws \| wss` | Main API websocket protocol | - | `wss` | `ws` |
 | NEXT_PUBLIC_STATS_API_HOST | `string` | Stats API endpoint url | - | - | `https://my-host.com` |
 | NEXT_PUBLIC_VISUALIZE_API_HOST | `string` | Visualize API endpoint url | - | - | `https://my-host.com` |