diff --git a/src/data/index.html b/src/data/index.html
index 8969dba..c749d9d 100644
--- a/src/data/index.html
+++ b/src/data/index.html
@@ -11,7 +11,7 @@
 	<hr>
 	<ul>
 		<li>
-			<a href="/ping"><b><samp>/ping</samp></b></a><br>
+			<a href="/state"><b><samp>/state</samp></b></a><br>
 			Get JSON structure with state of the server.
 		</li>
 		<br>
@@ -25,6 +25,12 @@
 			Get a live stream. Query params:<br>
 			<br>
 			<ul>
+				<li>
+					<b><samp>key=abc123</samp></b><br>
+					User-defined key, which is part of cookie <samp>stream_client</samp>, which allows<br>
+					the stream client to determine its identifier and view statistics using <a href="/state"><samp>/state</samp></a>.
+				</li>
+				<br>
 				<li>
 					<b><samp>extra_headers=1</samp></b><br>
 					Add <samp>X-UStreamer-*</samp> headers to /stream handle (like on <a href="/snapshot"><samp>/snapshot</samp></a>).
@@ -40,7 +46,7 @@
 					<b><samp>dual_final_frames=1</samp></b><br>
 					Enable workaround for Safari/WebKit bug when using option <samp>--drop-same-frames</samp>.<br>
 					Without this option, when the frame series is completed, WebKit-based browsers<br>
-					renders the last one with a delay.
+					renders the last frame with a delay.
 				</li>
 			</ul>
 		</li>
diff --git a/src/data/index_html.h b/src/data/index_html.h
index ce1bf60..7a4098e 100644
--- a/src/data/index_html.h
+++ b/src/data/index_html.h
@@ -38,7 +38,7 @@ const char *HTML_INDEX_PAGE = " \
 		<hr> \
 		<ul> \
 			<li> \
-				<a href=\"/ping\"><b><samp>/ping</samp></b></a><br> \
+				<a href=\"/state\"><b><samp>/state</samp></b></a><br> \
 				Get JSON structure with state of the server. \
 			</li> \
 			<br> \
@@ -52,6 +52,12 @@ const char *HTML_INDEX_PAGE = " \
 				Get a live stream. Query params:<br> \
 				<br> \
 				<ul> \
+					<li> \
+						<b><samp>key=abc123</samp></b><br> \
+						User-defined key, which is part of cookie <samp>stream_client</samp>, which allows<br> \
+						the stream client to determine its identifier and view statistics using <a href=\"/state\"><samp>/state</samp></a>. \
+					</li> \
+					<br> \
 					<li> \
 						<b><samp>extra_headers=1</samp></b><br> \
 						Add <samp>X-UStreamer-*</samp> headers to /stream handle (like on <a href=\"/snapshot\"><samp>/snapshot</samp></a>). \
@@ -67,7 +73,7 @@ const char *HTML_INDEX_PAGE = " \
 						<b><samp>dual_final_frames=1</samp></b><br> \
 						Enable workaround for Safari/WebKit bug when using option <samp>--drop-same-frames</samp>.<br> \
 						Without this option, when the frame series is completed, WebKit-based browsers<br> \
-						renders the last one with a delay. \
+						renders the last frame with a delay. \
 					</li> \
 				</ul> \
 			</li> \
diff --git a/src/http.c b/src/http.c
index 8336699..41a89af 100644
--- a/src/http.c
+++ b/src/http.c
@@ -51,7 +51,7 @@ static bool _http_get_param_true(struct evkeyvalq *params, const char *key);
 static char *_http_get_param_uri(struct evkeyvalq *params, const char *key);
 
 static void _http_callback_root(struct evhttp_request *request, void *arg);
-static void _http_callback_ping(struct evhttp_request *request, void *v_server);
+static void _http_callback_state(struct evhttp_request *request, void *v_server);
 static void _http_callback_snapshot(struct evhttp_request *request, void *v_server);
 
 static void _http_callback_stream(struct evhttp_request *request, void *v_server);
@@ -91,7 +91,7 @@ struct http_server_t *http_server_init(struct stream_t *stream) {
 	evhttp_set_allowed_methods(run->http, EVHTTP_REQ_GET|EVHTTP_REQ_HEAD);
 
 	assert(!evhttp_set_cb(run->http, "/", _http_callback_root, NULL));
-	assert(!evhttp_set_cb(run->http, "/ping", _http_callback_ping, (void *)server));
+	assert(!evhttp_set_cb(run->http, "/state", _http_callback_state, (void *)server));
 	assert(!evhttp_set_cb(run->http, "/snapshot", _http_callback_snapshot, (void *)server));
 	assert(!evhttp_set_cb(run->http, "/stream", _http_callback_stream, (void *)server));
 
@@ -189,7 +189,7 @@ static void _http_callback_root(struct evhttp_request *request, UNUSED void *arg
 	evbuffer_free(buf);
 }
 
-static void _http_callback_ping(struct evhttp_request *request, void *v_server) {
+static void _http_callback_state(struct evhttp_request *request, void *v_server) {
 	struct http_server_t *server = (struct http_server_t *)v_server;
 	struct evbuffer *buf;
 
@@ -199,7 +199,7 @@ static void _http_callback_ping(struct evhttp_request *request, void *v_server)
 	assert(evbuffer_add_printf(buf,
 		"{\"source\": {\"resolution\": {\"width\": %u, \"height\": %u},"
 		" \"online\": %s, \"quality\": %u, \"soft_fps\": %u, \"captured_fps\": %u},"
-		" \"stream\": {\"queued_fps\": %u,  \"clients\": %u, \"clients_stat\": {",
+		" \"stream\": {\"queued_fps\": %u, \"clients\": %u, \"clients_stat\": {",
 		(server->fake_width ? server->fake_width : server->run->exposed->width),
 		(server->fake_height ? server->fake_height : server->run->exposed->height),
 		bool_to_string(server->run->exposed->online),
diff --git a/src/main.c b/src/main.c
index fdcef63..d0e70e8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -135,8 +135,8 @@ static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_s
 	printf("                                  It can significantly reduce the outgoing traffic, but will increase\n");
 	printf("                                  the CPU loading. Don't use this option with analog signal sources\n");
 	printf("                                  or webcams, it's useless. Default: disabled.\n\n");
-	printf("    --fake-width <N>           -- Override image width for /ping. Default: disabled\n\n");
-	printf("    --fake-height <N>          -- Override image height for /ping. Default: disabled.\n\n");
+	printf("    --fake-width <N>           -- Override image width for /state. Default: disabled\n\n");
+	printf("    --fake-height <N>          -- Override image height for /state. Default: disabled.\n\n");
 	printf("    --server-timeout <seconds> -- Timeout for client connections. Default: %d\n\n", server->timeout);
 	printf("Misc options:\n");
 	printf("-------------\n");