FFastAPI × Asyntai50 free messages

AI Chatbot for FastAPIOne tag in your Jinja2 base.html. No new endpoint.

Products, pricing, docs, support: your AI assistant answers in seconds from your pages. Add one script tag to the base.html that your Jinja2Templates pages extend, deploy, and the chat is live on every page.

Start for free See the setup

No credit cardOne tag in base.htmlNo pip package

atelierlila.com/products/garance-linen-dress

Atelier Lila

Garance linen dress

$98.00

XSSML

Add to cart

Atelier LilaOnline

Hi! Any questions about this dress?

5 minto add the tag and deploy

24/7answers, weekends included

0endpoints or routers to write

50free messages to get started

What it handles

The questions your customers ask every day

They come right before the purchase, often in the evening. Without a quick answer, the cart stays empty. The chatbot answers them with your store's own information.

When will it arrive?How do I return an item?Which size should I pick?Can I pay with Afterpay?Do you offer 2-day shipping?My promo code doesn't work

Where is my order?Do you ship to Canada?What fabric is it?Do you offer gift wrapping?When is it back in stock?Do you sell wholesale?

Features

Built for FastAPI apps

Works with FastAPI apps that render HTML with Jinja2Templates, with HTMX, and on any ASGI server such as Uvicorn.

It knows your whole catalog

Product pages, categories, terms of sale, shipping and returns pages. Add your PDFs (size guide, data sheets) for everything else.

Garance linen dress$98.00

Ondine shirt$68.00

Size chart.pdfRead by the AI

Live in 5 minutes

One script tag in base.html and one deploy. No pip package, no endpoint, no router and no middleware.

5min

Speaks your customer's language

A shopper from Mexico, Quebec or Germany gets an answer in their own language, automatically.

ENESFRDEPTIT

It captures contacts

Quotes, trade orders, complex questions: it asks for the email and saves it.

Claire B.Quote for 40 pieces

New

Desktop and mobile

The chat adapts to every screen and sits clear of your header, menus and footer.

See what's blocking the sale

Conversations show the topics that keep coming back. You know what to add to your product pages.

Shipping38%

Sizes26%

Returns17%

Only your content

The AI answers from your pages and documents. It doesn't make up prices, delivery times or promises, and it doesn't answer off-topic questions.

Can you write me a poem?I only answer questions about the Atelier Lila store. Can I help you choose a size?

In action

An assistant that knows your store

It answers from your product pages, suggests the right items and wears your brand's colors.

Answers drawn from your pages
Sizes, delivery times, returns: it uses your own information and makes nothing up.
It can suggest your products
It shows items from your catalog as cards, with the price and a link to the product.
It passes contacts to you
For a quote or a trade order, it collects the customer's email.

Try a color

Setup

Simple setup on FastAPI

FastAPI apps that serve HTML usually point Jinja2Templates at one templates folder, with a base.html that the other pages extend. You add the script tag there once, deploy, and the chat shows on every page. Four steps, five minutes.

Sign up and copy your code

Create your Asyntai account, add your site's address and copy your code from the dashboard. The AI starts reading your pages right away.

Open base.html

Open the base template in the folder that you pass to Jinja2Templates, usually templates/base.html.

Paste before </body>

Paste the script tag just before the closing </body> tag, outside every block tag.

Deploy, and you're live

Deploy as usual and restart your ASGI server, for example Uvicorn. The chat bubble appears in the corner of every page and already answers your users.

Put the tag in base.html itself, not inside a block that child templates override. If your frontend is a separate React or Vue app, add the tag to its index.html instead.

my-fastapi-app templates/base.html

templates/base.html</body>

20 <body> 21 {% block content %}{% endblock %} 22 <script src="https://asyntai.com/static/js/chat-widget.js" 23 data-asyntai-id="YOUR_ID" async></script>24</body> 25</html>

Deploy

Why Asyntai

What FastAPI sites gain

Start free with 50 messages, then grow with your store.

See pricing Start for free

Fewer abandoned carts

A customer with a doubt right before paying gets an answer straight away. A question about shipping costs no longer makes them leave the store.

Fewer repetitive requests

Shipping, tracking, returns and sizes get an automatic answer from your own pages. You only handle the requests that really need you.

More sales, same traffic

You already pay to bring in visitors with Google Ads, Meta or marketplaces. The chatbot helps them find the right product and order.

FAQ

Frequently asked questions

Everything you need to know to add an AI chatbot to your FastAPI store.

Do I need a pip package?

No. One script tag in base.html loads the chat on every page. There is no package to install, nothing to add to your app object and no dependency to update when you upgrade FastAPI.

Do I need an endpoint, a router or an API key?

No. The chat runs on Asyntai servers and talks to them from the browser. You do not add endpoints, routers or background tasks, and the only value in your code is your public site ID.

Will it slow down my FastAPI site?

No. The script loads asynchronously, after the page is shown. It adds nothing to your server response time or your static files.

How does the chatbot learn my content?

When you add your site's address, the AI reads your published pages: products, docs, blog posts and policies. You can upload documents and add your own instructions. After you publish new pages, run a new crawl from the dashboard.

My FastAPI app is only an API. Can I still use it?

Yes. Add the tag to the frontend that calls your API, for example the index.html of your React, Vue or Svelte app. See our pages for those frameworks.

Can I show it only to some users or on some pages?

Yes. Pass a value to the template context, for example the signed-in user, and wrap the tag in a Jinja if tag. You can also put it in a block that only some templates fill.

Does it answer visitors who speak another language?

Yes. The chatbot detects the visitor's language and replies in it, even if your FastAPI site is only in English.

Can I use it on several sites?

Yes. Each site has its own setup and knowledge base. The Free plan covers 1 site, Starter 2, Standard 3 and Pro up to 20 sites.

Guide

How an AI chatbot helps FastAPI apps

Fast backend, real users

FastAPI is a modern Python web framework. Teams use it for AI products, SaaS apps, dashboards and data tools, and many of them also serve HTML pages with Jinja2. Users still get stuck: how does this work, what does my plan include, who do I contact.

An AI chatbot answers them in your app. It reads your published pages, docs and policies, then replies in plain English, in the tone you choose. Users get an immediate answer, and your team gets fewer support tickets about things that are already documented.

Answering the questions that block an order

Most questions arrive just before the purchase: shipping times, returns if the size is wrong, 2-day shipping, paying in installments. If the shopper can't find the answer in a few seconds, they close the tab.

The chatbot answers from your shipping, returns and terms pages. It reminds them of your return window, the carriers you use and your free-shipping threshold. The shopper feels reassured and completes the order.

A salesperson who knows every product

In a store, a salesperson helps with the choice. Online, the shopper is alone with your product pages. The chatbot takes that role: it compares two models, explains the difference between materials, recommends a size or suggests a matching item from your catalog.

Because it only answers from your content, it never recommends products you don't sell and never makes up specs. The richer your product pages, the more precise the answers.

Useful insights for your next campaigns

Every conversation is saved and searchable. Over the weeks, you see which products interest people most, the objections that keep coming up and the information that is missing.

If many shoppers ask whether a product comes in another color, you know what to add to your catalog. If shipping costs keep coming up, you can show them more clearly. The chatbot becomes both a customer service tool and a source of insight to grow your store.

Ready to add an AI assistant to your FastAPI app?

Start free with 50 messages and see how many questions your customers ask every day.

Start for free See pricing

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