What are my options to embed a chatbot in a Next.js app?
Use a vendor’s embed script or widget
Most chatbot providers give you a small <script> snippet or widget code you can paste into any site. In Next.js, you should load this via the next/script component rather than a raw <script> tag so that scripts are optimized and only loaded once. Typical options from vendors:- Floating chat bubble in the corner
- Inline chat area you place inside a page section
- “Copilot” button that opens a chat window on click
Build a custom chat UI backed by an API
The other pattern is building your own chat interface in React and delegating AI or support logic to an API:- UI lives in a React component (chat window, history, input box).
- Messages are sent to a Next.js API route or server action.
- That backend code calls an AI/chat service (e.g., CustomGPT.ai API, OpenAI, etc.).
How to embed a chatbot in the Next.js App Router
Load a third-party script globally in app/layout.tsx with next/script
For App Router projects (app/ directory), the recommended pattern is to load third-party widgets in the root layout, so they’re available on every route. Steps (App Router):- Install the chatbot provider if required (some use NPM packages; many just use a script URL).
- Import the Script component in your root layout:
| // app/layout.tsx import Script from ‘next/script’; import type { ReactNode } from ‘react’; export default function RootLayout({ children }: { children: ReactNode }) { return ( <html lang=“en”> <body> {children} <Script src=“https://example-chat.com/widget.js” strategy=“afterInteractive” /> </body> </html> ); } |
- Use strategy=”afterInteractive” so the script loads after hydration, which is ideal for most chat widgets.
- If the provider asks for a global config object (e.g., window.chatWidgetConfig), set it above the script:
| <Script id=“chat-config” strategy=“beforeInteractive”> {`window.chatWidgetConfig = { projectId: “YOUR_ID” };`} </Script> |
- Test navigation between routes to ensure the widget only loads once and persists as users move around your app.
- If you want the chatbot only on specific sections (e.g., /dashboard), you can place the Script in that segment’s layout instead of the root.
How to embed a chatbot in the Next.js Pages Router
Load a third-party script in _app.tsx or a specific page with next/script
For older or legacy projects that still use the pages/ directory, you embed scripts using next/script inside _app.tsx or directly in a page. Steps (Pages Router, global):- Open pages/_app.tsx and import Script:
| import type { AppProps } from ‘next/app’; import Script from ‘next/script’; export default function MyApp({ Component, pageProps }: AppProps) { return ( <> <Component {…pageProps} /> <Script src=”https://example-chat.com/widget.js” strategy=”afterInteractive” /> </> ); } |
- This loads the chatbot widget on every page.
- If you only want the chatbot on /support, add the Script in pages/support.tsx instead.
- Use strategy props (afterInteractive, lazyOnload) to balance performance and responsiveness.
- Confirm in dev tools that the script loads once and that navigation doesn’t re-insert the widget multiple times.
How to do it with CustomGPT.ai
This section shows how to use CustomGPT.ai specifically, using the same App Router / Pages Router patterns you just saw.Create and configure an agent you can embed
- Create or open an agent in your CustomGPT.ai dashboard (e.g., trained on your docs or website).
- Make sure its knowledge sources are configured (sitemaps, files, etc.) and responses look correct in the built-in chat.
- Open the Deploy Agent / Deploy option for that agent.
- Ensure the agent is set to public so it can be embedded on external sites.
Choose Embed vs Live Chat vs Website Copilot and copy the snippet
CustomGPT.ai gives multiple deployment options that all produce an embeddable script:- In the Deploy screen, choose Embed to get an inline / iframe-style chatbot you can place in a page section.
- Choose Live Chat if you want a floating chat bubble that opens a chat window; configure side, size, and appearance, then copy the Live Chat script.
- Choose Website Copilot if you want a button (e.g., in the header) that opens a ChatGPT-style assistant; copy the Copilot script.
- For each option, you’ll receive a <script> snippet plus attributes (such as project/agent ID) that identify which agent to load.
- Paste that script into your Next.js app using the App Router or Pages Router patterns above—replace https://example-chat.com/widget.js with the CustomGPT.ai script URL and config from the docs.
Build a custom Next.js chat UI with an AI backend
If you’d rather have a completely custom chat UI (custom layout, multi-panel dashboard, extra controls) instead of the drop-in widget, you can wire a Next.js front end to the CustomGPT.ai API. High-level steps:- Get an API key from CustomGPT’s developer or Deploy / API tab.
- In CustomGPT.ai, create or find the agent you want to connect to and note its agent/project ID.
- In your Next.js app, create an API route (e.g., /api/chat) that:
- Creates a conversation for that agent if needed
- Sends user messages to CustomGPT.ai’s /conversations/{sessionId}/messages endpoint
- Returns the AI’s reply to the frontend.
- Build a React chat component (messages list + input box) that calls /api/chat and displays the responses.
- Optionally, use the Chat Widget – Next.js Version starter as a reference or base; it’s a voice-enabled Next.js widget that already integrates with the CustomGPT RAG API.
Example — Next.js SaaS app with an inline support chatbot
Imagine a SaaS dashboard at /app built with the App Router:- The team trains a CustomGPT.ai agent on their docs and changelog.
- They open Deploy → Embed, copy the inline embed snippet, and adapt it into a next/script block in app/layout.tsx.
- In the layout, they also add a <section> in the right sidebar with a simple heading “Ask support” where the embedded iframe/chat appears.
- When users open any dashboard route, the inline chatbot is always visible, can answer questions based on the product docs, and keeps them inside the app.
- Later, they add a Copilot button in the top navigation using the Website Copilot script so users can pop open a larger assistant window.
Conclusion
In the end, the real tradeoff isn’t whether to add a chatbot to your app, but whether you sacrifice control and performance to ship it fast. Customgpt.ai resolves that tension with ready-to-embed widgets, Website Copilot, and API-powered Next.js integrations that stay fully aligned with your data and UX. If you’re ready to ship an on-brand, AI-powered assistant without rebuilding your stack, get started with CustomGPT.ai for Next.js chatbots today.Frequently Asked Questions
Where should I put a chatbot script in Next.js so it loads once across routes?
Nitro! Bootcamp launched 60 AI chatbots in 90 minutes for 30+ minority-owned small businesses with a 100% success rate. In Next.js, load a provider widget with the Script component in app/layout.tsx for the App Router or in _app.tsx for the Pages Router when you want it available across routes. Use strategy=”afterInteractive” for the widget script, and keep it in one global location so it initializes once instead of duplicating on route changes.
Should I use a JavaScript embed or build a custom chat UI in Next.js?
Dr. Michael Levin said, “Omg finally, I can retire! A high-school student made this chat-bot trained on our papers and presentations.” In Next.js, use a JavaScript embed when you want the fastest deployment. Build a custom React chat UI when you need full control over layout, styling, authentication, or features such as showing sources and grouping conversations. The backend can still be an API service such as CustomGPT.ai or OpenAI, so this choice is mainly about frontend speed versus control.
What embed options are documented for a chatbot in Next.js?
Kevin Petrie described CustomGPT.ai as “a no-code platform for creating custom AI business agents.” In Next.js, the documented embed options are a floating chat bubble, an inline chat area, or a copilot button that opens a chat window on click. All three follow the same pattern: load the provider script with next/script and add any required config object or HTML hook element.
How do I control the look and layout of a chatbot in Next.js?
If you need precise control over the chatbot’s header, layout, styling, or branding, a custom React chat UI is the safer path. A vendor widget is faster to install, but the documented advantage of a custom UI is full control over layout, styling, authentication, and feature design. That makes a custom UI the better choice when a preset widget does not match your app experience.
How do I add authentication-aware chatbot behavior in Next.js?
If the chatbot needs to reflect a signed-in experience, build a custom React chat UI and send messages through a Next.js API route or server action. That pattern lets you keep authentication logic in backend code while still connecting to the AI service from your app. SOC 2 Type 2 certification is a useful security signal, but you still need an implementation that keeps auth decisions under your control.
How can I track analytics and conversation data from a chatbot in Next.js?
If the provider’s built-in analytics and conversation tracking are enough, an embed is the quickest route. If you need deeper instrumentation or custom logging, build the chat UI in React and send messages through a Next.js API route or server action. That gives you more control over how conversations are grouped and what interaction data your app records.
What privacy checks should I make before loading a chatbot script in Next.js?
Before loading a chatbot script, make sure its data collection and script behavior comply with local privacy laws such as GDPR in the EU and CCPA/CPRA in California. The supplied materials also note GDPR compliance and that data is not used for model training, which can reduce risk. You still need to match the implementation to your jurisdiction, the type of data collected, and the pages where the chatbot appears.