diff --git a/modules/programs/opencode.nix b/modules/programs/opencode.nix
index 62706508..fec747a1 100644
--- a/modules/programs/opencode.nix
+++ b/modules/programs/opencode.nix
@@ -14,6 +14,7 @@ let
     ;
 
   cfg = config.programs.opencode;
+  webCfg = cfg.web;
 
   jsonFormat = pkgs.formats.json { };
 
@@ -87,6 +88,35 @@ in
       '';
     };
 
+    web = {
+      enable = lib.mkEnableOption "opencode web service";
+
+      extraArgs = mkOption {
+        type = lib.types.listOf lib.types.str;
+        default = [ ];
+        example = [
+          "--hostname"
+          "0.0.0.0"
+          "--port"
+          "4096"
+          "--mdns"
+          "--cors"
+          "https://example.com"
+          "--cors"
+          "http://localhost:3000"
+          "--print-logs"
+          "--log-level"
+          "DEBUG"
+        ];
+        description = ''
+          Extra arguments to pass to the opencode web command.
+
+          These arguments override the "server" options defined in the configuration file.
+          See <https://opencode.ai/docs/web/#config-file> for available options.
+        '';
+      };
+    };
+
     rules = lib.mkOption {
       type = lib.types.either lib.types.lines lib.types.path;
       default = "";
@@ -443,5 +473,43 @@ in
         )
       ) cfg.themes
     );
+
+    systemd.user.services = mkIf webCfg.enable {
+      opencode-web = {
+        Unit = {
+          Description = "OpenCode Web Service";
+          After = [ "network.target" ];
+        };
+
+        Service = {
+          ExecStart = "${lib.getExe cfg.package} web ${lib.escapeShellArgs webCfg.extraArgs}";
+          Restart = "always";
+          RestartSec = 5;
+        };
+
+        Install = {
+          WantedBy = [ "default.target" ];
+        };
+      };
+    };
+
+    launchd.agents = mkIf webCfg.enable {
+      opencode-web = {
+        enable = true;
+        config = {
+          ProgramArguments = [
+            (lib.getExe cfg.package)
+            "web"
+          ]
+          ++ webCfg.extraArgs;
+          KeepAlive = {
+            Crashed = true;
+            SuccessfulExit = false;
+          };
+          ProcessType = "Background";
+          RunAtLoad = true;
+        };
+      };
+    };
   };
 }
diff --git a/tests/modules/programs/opencode/default.nix b/tests/modules/programs/opencode/default.nix
index cd88c35e..99193913 100644
--- a/tests/modules/programs/opencode/default.nix
+++ b/tests/modules/programs/opencode/default.nix
@@ -23,4 +23,5 @@
   opencode-themes-bulk-directory = ./themes-bulk-directory.nix;
   opencode-mcp-integration = ./mcp-integration.nix;
   opencode-mcp-integration-with-override = ./mcp-integration-with-override.nix;
+  opencode-web-service = ./web-service.nix;
 }
diff --git a/tests/modules/programs/opencode/web-service.nix b/tests/modules/programs/opencode/web-service.nix
new file mode 100644
index 00000000..593cbb53
--- /dev/null
+++ b/tests/modules/programs/opencode/web-service.nix
@@ -0,0 +1,41 @@
+{
+  pkgs,
+  ...
+}:
+{
+  programs.opencode = {
+    enable = true;
+
+    web = {
+      enable = true;
+      extraArgs = [
+        "--hostname"
+        "0.0.0.0"
+        "--port"
+        "4096"
+        "--mdns"
+        "--cors"
+        "https://example.com"
+        "--cors"
+        "http://localhost:3000"
+        "--print-logs"
+        "--log-level"
+        "DEBUG"
+      ];
+    };
+  };
+
+  nmt.script =
+    if pkgs.stdenv.hostPlatform.isDarwin then
+      ''
+        serviceFile=LaunchAgents/org.nix-community.home.opencode-web.plist
+        assertFileExists "$serviceFile"
+        assertFileContent "$serviceFile" ${./web-service.plist}
+      ''
+    else
+      ''
+        serviceFile=home-files/.config/systemd/user/opencode-web.service
+        assertFileExists "$serviceFile"
+        assertFileContent "$serviceFile" ${./web-service.service}
+      '';
+}
diff --git a/tests/modules/programs/opencode/web-service.plist b/tests/modules/programs/opencode/web-service.plist
new file mode 100644
index 00000000..d7247b10
--- /dev/null
+++ b/tests/modules/programs/opencode/web-service.plist
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>KeepAlive</key>
+	<dict>
+		<key>Crashed</key>
+		<true/>
+		<key>SuccessfulExit</key>
+		<false/>
+	</dict>
+	<key>Label</key>
+	<string>org.nix-community.home.opencode-web</string>
+	<key>ProcessType</key>
+	<string>Background</string>
+	<key>ProgramArguments</key>
+	<array>
+		<string>@opencode@/bin/opencode</string>
+		<string>web</string>
+		<string>--hostname</string>
+		<string>0.0.0.0</string>
+		<string>--port</string>
+		<string>4096</string>
+		<string>--mdns</string>
+		<string>--cors</string>
+		<string>https://example.com</string>
+		<string>--cors</string>
+		<string>http://localhost:3000</string>
+		<string>--print-logs</string>
+		<string>--log-level</string>
+		<string>DEBUG</string>
+	</array>
+	<key>RunAtLoad</key>
+	<true/>
+</dict>
+</plist>
\ No newline at end of file
diff --git a/tests/modules/programs/opencode/web-service.service b/tests/modules/programs/opencode/web-service.service
new file mode 100644
index 00000000..9f62ef43
--- /dev/null
+++ b/tests/modules/programs/opencode/web-service.service
@@ -0,0 +1,11 @@
+[Install]
+WantedBy=default.target
+
+[Service]
+ExecStart=@opencode@/bin/opencode web --hostname 0.0.0.0 --port 4096 --mdns --cors https://example.com --cors http://localhost:3000 --print-logs --log-level DEBUG
+Restart=always
+RestartSec=5
+
+[Unit]
+After=network.target
+Description=OpenCode Web Service