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+import Image from '@theme/IdealImage';
+
+# Retool Assist
+
+This guide walks you through connecting [Retool Assist](https://docs.retool.com/apps/guides/assist/) to LiteLLM Proxy. Retool Assist uses AI to generate and edit apps from within the Retool app IDE. Using LiteLLM with Retool Assist allows you to:
+
+- Access 100+ LLMs through Retool Assist
+- Track spend and usage, set budget limits per virtual key
+- Control which models Retool Assist can access
+- Use your own LLM providers via a unified OpenAI-compatible API
+
+
+
+
+
+---
+
+:::info
+**Hosted Retool requires a public URL.** Retool Cloud runs on Retool's servers, so `localhost` will not work. You must expose your LiteLLM proxy via ngrok, Cloudflare Tunnel, or by deploying to a cloud provider.
+:::
+
+## Quick Reference
+
+| Setting | Value |
+|---------|-------|
+| Provider Schema | OpenAI |
+| Base URL | Your ngrok URL (e.g. `https://abc123.ngrok-free.app`) or deployed proxy URL |
+| API Key | Your LiteLLM Virtual Key |
+| Model | Public model name from LiteLLM (e.g. `openai/gpt-4o-mini`, `openai/gpt-5.2-2025-12-11`) |
+
+---
+
+## Prerequisites
+
+- LiteLLM Proxy running locally or deployed
+- [ngrok](https://ngrok.com/download) (or similar tunnel) for local development with hosted Retool
+- A [Retool](https://retool.com) account (Cloud or self-hosted)
+
+## 1. Start LiteLLM Proxy
+
+Set up LiteLLM Proxy following the [Getting Started Guide](https://docs.litellm.ai/docs/proxy/docker_quick_start). Ensure your proxy is running on port 4000.
+
+## 2. Expose LiteLLM with a Public URL
+
+
+
+Retool Cloud runs on Retool's servers. You must expose your local LiteLLM proxy with a public URL.
+
+### Using ngrok
+
+- Install [ngrok](https://ngrok.com/download)
+- In a separate terminal, run:
+
+```bash
+ngrok http 4000
+```
+- Copy the generated HTTPS URL (e.g. `https://abc123.ngrok-free.app`). This is your **Base URL** for Retool.
+
+
+### Alternative
+
+If you deploy LiteLLM to Railway, Render, Fly.io, or another cloud provider, use that public URL as your Base URL. See the [Deploy guide](https://docs.litellm.ai/docs/proxy/deploy) for details.
+
+## 3. Generate a Virtual Key
+
+
+
+Create a virtual key that Retool Assist will use to authenticate with LiteLLM. The key must have access to the models you want to use (e.g. `openai/*` for all OpenAI models).
+
+### Via LiteLLM UI
+
+- Navigate to [http://localhost:4000/ui](http://localhost:4000/ui)
+- Go to **Virtual Keys** → **+ Create New Key**
+- Select the models you need (or `openai/*` for all OpenAI models)
+- Copy the key
+
+## 4. Add LiteLLM as a Custom Provider in Retool
+
+Inside your Retool dashboard, configure LiteLLM as a custom AI resource:
+
+
+
+1. Go to **Resources**
+
+2. Under the **AI** category, select **Custom Provider**
+
+3. Fill in the form:
+ - **Name:** `LiteLLM`
+ - **Description:** (optional) e.g. `LiteLLM Proxy - 100+ LLMs`
+ - **Provider Schema:** `OpenAI`
+ - **Base URL:** Your ngrok-generated URL (e.g. `https://abc123.ngrok-free.app`) or deployed proxy URL—do not add `/v1` unless Retool requires it
+ - **API Key:** Your LiteLLM virtual key from Step 3
+4. **Add model names** from your LiteLLM proxy (e.g. `openai/gpt-4o-mini`, `openai/gpt-5.2-2025-12-11`).
+5. Click **Create Resource**
+
+
+
+## 5. Test the Connection
+
+
+
+- Open an app in Retool and enable **Assist** (if not already enabled in your organization)
+- Use Assist to generate or edit app elements, it will route requests through LiteLLM
+- Use the code option from the Sidebar to add a resource query, select the LiteLLM resource, and run it to test the setup.
+- Check the LiteLLM **Logs** section to verify requests and track usage
+
+
+
+---
+
+## Troubleshooting
+
+### 401 Unauthorized
+
+- Ensure the **API Key** in Retool matches your LiteLLM virtual key exactly
+- Verify the key is not expired or blocked in LiteLLM
+
+### 401 "key not allowed to access model"
+
+Your virtual key is restricted to specific models. Generate a new key with `openai/*` or include the model you need (e.g. `openai/gpt-5.2-2025-12-11`) in the key's allowed models list.
+
+### 500 "api_key client option must be set"
+
+LiteLLM could not use your OpenAI API key to call the provider. Ensure `OPENAI_API_KEY` is set in your LiteLLM environment (e.g. in `.env` or `docker-compose.yml`) when using `openai/*` models.
+
+### localhost does not work
+
+Retool Cloud cannot reach `localhost` it points to Retool's servers. Use ngrok or deploy LiteLLM to a public URL.
+
+---
+
+## Additional Resources
+
+- [Virtual Keys](https://docs.litellm.ai/docs/proxy/virtual_keys) – Create and manage API keys
+- [Deploy LiteLLM](https://docs.litellm.ai/docs/proxy/deploy) – Production deployment options
+- [Retool Assist Documentation](https://docs.retool.com/apps/guides/assist/) – Configure Assist and prompting guides
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diff --git a/docs/my-website/sidebars.js b/docs/my-website/sidebars.js
index 64c8fb291be..d032b8ca393 100644
--- a/docs/my-website/sidebars.js
+++ b/docs/my-website/sidebars.js
@@ -172,7 +172,8 @@ const sidebars = {
"tutorials/litellm_gemini_cli",
"tutorials/google_genai_sdk",
"tutorials/litellm_qwen_code_cli",
- "tutorials/openai_codex"
+ "tutorials/openai_codex",
+ "tutorials/retool_assist"
]
},
{