diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index d9b84c2ab..b59359b4a 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -11,8 +11,26 @@ permissions:
   pages: write
 
 jobs:
+  build-doxygen-xml:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Install Doxygen
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends -y doxygen
+      - name: Run Doxygen
+        run: doxygen Doxyfile
+      - name: Upload Doxygen documentation
+        uses: actions/upload-artifact@v4
+        with:
+          name: doxygen-documentation-xml
+          path: xml
   build-sphinx:
     runs-on: ubuntu-24.04
+    needs:
+      - build-doxygen-xml
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -20,9 +38,18 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: '3.13'
+      - name: Install Doxygen
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends -y doxygen
       - name: Install dependencies
         run: |
           python3 -m pip install -r docs/requirements.txt
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: doxygen-documentation-xml
+          path: xml
       - name: Configure project
         run: >
           cmake -S . -B build -D USE_DOCS=ON
diff --git a/.gitignore b/.gitignore
index d8b266179..b779f5650 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /build*
+/xml
 out
 mpich
 cmake-build-*
diff --git a/Doxyfile b/Doxyfile
new file mode 100644
index 000000000..f34d72ede
--- /dev/null
+++ b/Doxyfile
@@ -0,0 +1,17 @@
+# Project identity
+PROJECT_NAME           = "Parallel Programming Course"
+PROJECT_BRIEF          = "Parallel Programming Course"
+
+# Input
+INPUT                  = modules/core/task/include \
+                         modules/core/task/src \
+                         modules/core/util/include \
+                         modules/core/util/src
+FILE_PATTERNS          = *.h *.c *.hpp *.cpp
+RECURSIVE              = YES
+
+# Build
+GENERATE_HTML          = NO
+GENERATE_LATEX         = NO
+GENERATE_XML           = YES
+XML_OUTPUT             = xml
diff --git a/docs/conf.py b/docs/conf.py
index aefad80c1..35cdc158b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -6,6 +6,8 @@
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
+import os
+
 project = 'Parallel Programming Course'
 copyright = '2025, Learning Process'
 author = 'Learning Process'
@@ -13,7 +15,14 @@
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
-extensions = []
+extensions = [
+    'breathe',
+]
+
+breathe_projects = {
+    "ParallelProgrammingCourse": os.path.join(os.path.dirname(__file__), "..", "xml"),
+}
+breathe_default_project = "ParallelProgrammingCourse"
 
 templates_path = ['_templates']
 exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
diff --git a/docs/index.rst b/docs/index.rst
index 2d4e0d90c..0ecaad6aa 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -12,6 +12,7 @@ Below is the table of contents for the Parallel Programming Course documentation
    user_guide/environment
    user_guide/submit_work
    user_guide/ci
+   user_guide/api
 
 .. toctree::
    :maxdepth: 2
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 7634b35ce..1159d5e53 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,4 @@
 Sphinx==8.1.3
 sphinx-rtd-theme==3.0.2
 sphinx-intl==2.3.1
+breathe==4.36.0
diff --git a/docs/user_guide/api.rst b/docs/user_guide/api.rst
new file mode 100644
index 000000000..6d83a131e
--- /dev/null
+++ b/docs/user_guide/api.rst
@@ -0,0 +1,8 @@
+API Reference
+=============
+
+.. toctree::
+   :maxdepth: 1
+
+.. doxygenindex::
+   :project: ParallelProgrammingCourse