Put a voice agent on your site with one line
Paste a single script tag and a "talk to us" bubble appears on your page, styled to your brand, isolated from your CSS and responsive on mobile. No frontend to build, no SDK to install. It connects to the same agent that answers your phone. Flat $0.08 a minute.
<script src="https://nixflex.com/button.js" data-number="+1 5•• ••• 0148" data-color="#25D366"> </script>
One snippet, no frontend to build
Putting voice in front of visitors used to mean integrating a client library, minting access tokens and designing a call interface before anyone could say a word. The embed collapses that into a script tag. You paste it before the closing body tag, set the number and colour, and the widget takes care of the microphone, the connection and the call UI itself.
Floating or inline, your call
A launcher sits in the corner of every page and expands when tapped, like a chat bubble but over voice. Best for site-wide help that follows the visitor wherever they browse.
The widget drops into one place in your layout, such as a contact section or a product page. Best when you want voice in a specific spot rather than on every screen.
It will not fight your stylesheet
The widget renders in its own isolated container, so your site CSS cannot break it and its styles cannot leak into your pages. That is what lets the same snippet behave identically on a hand-coded site and a heavy CMS theme. On a phone the launcher repositions to stay tap-friendly and the panel fits the screen, so one paste covers laptop and mobile.
The same agent, on the web and the phone
The embed is not a separate bot. It connects to the same agent that answers your calls, with the same persona, prompt and tools, and it can book, look things up and hand off exactly as the phone side does. Refine the agent once and both surfaces improve. There is no SDK to install first; the widget is the drop-in, and the underlying API is plain REST when you want more control.
See the Web Call API, Voice for SaaS and White-label pages, or the full docs. Coming from another platform? Nixflex is a modern alternative to Retell, Vapi and Bland. Compare them →
Developer FAQ
How do I embed a voice agent on my site?
Paste one script tag into your page, set the number it should connect to and a colour, and a voice bubble appears. There is no frontend to build and no SDK to install; the script handles the widget, the microphone and the connection for you.
Floating bubble or inline, which do I use?
A floating bubble sits in the corner of every page and expands when a visitor taps it, which suits site-wide help. An inline placement drops the widget into one spot in your layout, which suits a dedicated "talk to us" section or a product page. Both run the same agent; you pick based on where you want voice to live.
Can I match it to my brand?
Yes. You set the colour on the snippet, and the widget picks up your styling rather than shipping a generic look. It is meant to feel like part of your site, not a bolted-on third-party box.
Will it clash with my existing CSS?
No. The widget renders in its own isolated container, so your site styles cannot break it and its styles cannot leak into your pages. That isolation is what lets one snippet work the same on a hand-built site and a heavy CMS theme.
Does it work on mobile?
Yes. The widget is responsive: on a phone the launcher repositions to stay easy to tap and the expanded view fits the screen. The same single snippet covers laptop and mobile without extra work.
Is the embedded widget the same agent as my phone line?
Yes. The embed connects to the same agent that answers your calls, so it carries the same persona, prompt and tools. You define behaviour once and it works whether a visitor talks to it on your site or a caller reaches it by phone.
What does the embed cost to run?
A flat $0.08 per minute of voice, the same as a phone call, pay-as-you-go with the premium model included. There is no separate charge for embedding and no per-page fee; you pay for the minutes visitors actually talk.
Embed voice on your site today
Grab the snippet, paste one line, and a voice bubble is live on your page.