diff --git a/lib/datadog/appsec/stack_trace.rb b/lib/datadog/appsec/stack_trace.rb
new file mode 100644
index 00000000000..1211ef9380b
--- /dev/null
+++ b/lib/datadog/appsec/stack_trace.rb
@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+module Datadog
+  module AppSec
+    # Stack trace
+    class StackTrace
+      attr_reader :id, :message, :frames
+
+      def initialize(id, stack_trace, message: nil)
+        @id = id
+        @message = message
+        @frames = stack_trace.each_with_index.map do |frame, index|
+          Frame.new(
+            index,
+            text: frame.to_s,
+            file: frame.absolute_path, # path will show 'main' instead of the actual file
+            line: frame.lineno,
+            function: frame.base_label # label will show 'block in function' instead of just 'function'
+          )
+        end
+      end
+
+      def to_h
+        @to_h ||= {
+          language: 'ruby',
+          id: @id,
+          message: @message,
+          frames: @frames.map(&:to_h)
+        }
+      end
+
+      # Stack frame
+      class Frame
+        attr_reader :id, :text, :file, :line, :function
+
+        def initialize(id, text: nil, file: nil, line: nil, function: nil)
+          @id = id
+          @text = text
+          @file = file
+          @line = line
+          @function = function
+        end
+
+        def to_h
+          @to_h ||= {
+            id: @id,
+            text: @text,
+            file: @file,
+            line: @line,
+            function: @function
+          }
+        end
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/sig/datadog/appsec/stack_trace.rbs b/sig/datadog/appsec/stack_trace.rbs
new file mode 100644
index 00000000000..c940b9d776f
--- /dev/null
+++ b/sig/datadog/appsec/stack_trace.rbs
@@ -0,0 +1,27 @@
+module Datadog
+  module AppSec
+    class StackTrace
+      attr_reader id: ::String
+      attr_reader message: ::String?
+      attr_reader frames: ::Array[Frame]
+
+      @to_h: ::Hash[::Symbol, untyped]
+
+      def initialize: (::String id, ::Array[::Thread::Backtrace::Location] stack_trace, ?message: ::String?) -> void
+
+      class Frame
+        attr_reader id: ::Integer
+        attr_reader text: ::String?
+        attr_reader file: ::String?
+        attr_reader line: ::Integer?
+        attr_reader function: ::String?
+
+        @to_h: ::Hash[::Symbol, untyped]
+
+        def initialize: (::Integer id, ?text: ::String?, ?file: ::String?, ?line: ::Integer?, ?function: ::String?) -> void
+        
+        def to_h: () -> ::Hash[::Symbol, untyped]
+      end
+    end
+  end
+end