docs: add UnoRouter provider page

docs/providers/unorouter.md

@@ -0,0 +1,93 @@
+# UnoRouter
+
+## Overview
+
+| Property | Details |
+|-------|-------|
+| Description | UnoRouter is an open-source OpenAI-compatible gateway serving 200+ models, most with a genuine free tier (`:free` suffix). |
+| Provider Route on LiteLLM | `unorouter/` |
+| Link to Provider Doc | [UnoRouter](https://unorouter.com/models) |
+| Base URL | `https://api.unorouter.com/v1` |
+| Supported Operations | [`/chat/completions`](#sample-usage) |
+
+<br />
+
+## Required Variables
+
+```python showLineNumbers title="Environment Variables"
+os.environ["UNOROUTER_API_KEY"] = ""  # your UnoRouter API key from https://unorouter.com/token
+```
+
+## Sample Usage
+
+```python showLineNumbers title="UnoRouter Completion"
+import os
+from litellm import completion
+
+os.environ["UNOROUTER_API_KEY"] = ""
+
+response = completion(
+    model="unorouter/deepseek-v4-flash:free",
+    messages=[{"role": "user", "content": "Hello from LiteLLM"}],
+)
+
+print(response)
+```
+
+## Sample Usage - Streaming
+
+```python showLineNumbers title="UnoRouter Streaming Completion"
+import os
+from litellm import completion
+
+os.environ["UNOROUTER_API_KEY"] = ""
+
+response = completion(
+    model="unorouter/deepseek-v4-flash:free",
+    messages=[{"role": "user", "content": "Stream a short reply"}],
+    stream=True,
+)
+
+for chunk in response:
+    print(chunk)
+```
+
+## Usage with LiteLLM Proxy Server
+
+1. Add the model to your proxy config:
+
+```yaml showLineNumbers title="config.yaml"
+model_list:
+  - model_name: unorouter-chat
+    litellm_params:
+      model: unorouter/deepseek-v4-flash:free
+      api_key: os.environ/UNOROUTER_API_KEY
+```
+
+2. Start the proxy:
+
+```bash
+litellm --config /path/to/config.yaml
+```
+
+## Direct API Usage (Bearer Token)
+
+Use the environment variable as a Bearer token against the OpenAI-compatible endpoint:
+`https://api.unorouter.com/v1/chat/completions`.
+
+```bash showLineNumbers title="cURL"
+export UNOROUTER_API_KEY=""
+curl https://api.unorouter.com/v1/chat/completions \
+  -H "Authorization: Bearer ${UNOROUTER_API_KEY}" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "deepseek-v4-flash:free",
+    "messages": [{"role": "user", "content": "Hello from UnoRouter"}]
+  }'
+```
+
+## Notes
+
+- The full live model catalog (200+ models) is at [unorouter.com/models](https://unorouter.com/models) or via `GET https://api.unorouter.com/v1/models`.
+- Models with a `:free` suffix cost nothing and run on shared free pools with a light per-model rate limit; a busy free model returns an explicit "all providers busy" error and recovers automatically.
+- API keys: free signup at [unorouter.com](https://unorouter.com) (Discord or GitHub, no card).

sidebars.js

@@ -1161,6 +1161,7 @@ const sidebars = {
         "providers/togetherai",
         "providers/topaz",
         "providers/triton-inference-server",
+        "providers/unorouter",
         "providers/v0",
         "providers/vercel_ai_gateway",
         {