diff --git a/docs/apis/index.md b/docs/apis/index.md
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@@ -0,0 +1,87 @@
+---
+icon: material/api
+---
+
+# OpenML APIs
+
+OpenML provides APIs for multiple programming languages and use cases. Choose your preferred client library to get started.
+
+## Client Libraries
+
+<div class="grid-cards">
+
+<div class="card">
+<h3>Python</h3>
+<p>The OpenML Python API provides a convenient way to interact with OpenML from Python. It integrates with scikit-learn and other popular libraries.</p>
+<p><a href="python/">Python Documentation →</a></p>
+</div>
+
+<div class="card">
+<h3>R</h3>
+<p>The R client provides a native interface for R users, integrating with popular R machine learning libraries.</p>
+<p><a href="r/">R Documentation →</a></p>
+</div>
+
+<div class="card">
+<h3>Java</h3>
+<p>The Java client allows you to integrate OpenML into Java applications.</p>
+<p><a href="ecosystem/Java/">Java Documentation →</a></p>
+</div>
+
+<div class="card">
+<h3>REST API</h3>
+<p>The REST API provides direct HTTP access to OpenML services. Use it from any programming language or tool.</p>
+<p><a href="ecosystem/Rest/">REST API Documentation →</a></p>
+</div>
+
+</div>
+
+## Additional Clients
+
+<div class="grid-cards">
+
+<div class="card">
+<h3>PyTorch</h3>
+<p>OpenML integration for PyTorch workflows.</p>
+<p><a href="pytorch/">PyTorch Documentation →</a></p>
+</div>
+
+<div class="card">
+<h3>TensorFlow</h3>
+<p>OpenML integration for TensorFlow workflows.</p>
+<p><a href="tensorflow/">TensorFlow Documentation →</a></p>
+</div>
+
+<div class="card">
+<h3>Julia</h3>
+<p>OpenML.jl - Julia client for OpenML.</p>
+<p><a href="julia/">Julia Documentation →</a></p>
+</div>
+
+<div class="card">
+<h3>APIv2</h3>
+<p>The next generation OpenML API.</p>
+<p><a href="apiv2/">APIv2 Documentation →</a></p>
+</div>
+
+</div>
+
+## Getting Started
+
+### Authentication
+
+To upload data or share experiments, you'll need an OpenML account and API key:
+
+1. [Create an account](https://www.openml.org/auth/sign-up) on OpenML.org
+2. Go to your profile page to find your API key
+3. Configure your client with the API key
+
+### Testing
+
+For development and testing, use the test server instead of the production server:
+
+- **Test server URL**: https://test.openml.org/
+- **Production server URL**: https://www.openml.org/
+
+!!! note "Test Server"
+    The test server allows you to experiment without affecting production data. Use it for testing uploads, runs, and other operations.
diff --git a/docs/css/extra.css b/docs/css/extra.css
index f3c129b1..dd86b185 100644
--- a/docs/css/extra.css
+++ b/docs/css/extra.css
@@ -122,4 +122,32 @@ table {
 }
 .pink{
   color: #4caf50
+}
+
+.grid-cards {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
+  gap: 20px;
+  margin: 20px 0;
+}
+
+.grid-cards .card {
+  border: 1px solid var(--md-default-fg-color--lightest);
+  border-radius: 8px;
+  padding: 24px;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+  transition: box-shadow 0.3s ease;
+}
+
+.grid-cards .card:hover {
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+}
+
+.grid-cards .card h3 {
+  margin-top: 0;
+  color: var(--md-primary-fg-color);
+}
+
+.grid-cards .card a {
+  font-weight: 600;
 }
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diff --git a/mkdocs.yml b/mkdocs.yml
index f13d3b3a..0a462351 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -197,9 +197,10 @@ nav:
         - Style guide : contributing/Style.md
         - Resources: contributing/resources.md
     - Questions: help/index.md
+    - APIs: apis/index.md
     - Python:
         - python/index.md
-        - Code Reference: reference/
+        - Code Reference: python/reference/
         - Examples: examples/
         - Usage: python/usage.md
         - Contributing: python/contributing.md