---
title: Demos and architectures
description: Explore demo applications and reference architectures that use D1 databases.
image: https://developers.cloudflare.com/dev-products-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/d1/llms.txt  
> Use this file to discover all available pages before exploring further. 

[Skip to content](#%5Ftop) 

# Demos and architectures

Learn how you can use D1 within your existing application and architecture.

## Featured Demos

* [Starter code for D1 Sessions API ↗](https://github.com/cloudflare/templates/tree/main/d1-starter-sessions-api-template): An introduction to D1 Sessions API. This demo simulates purchase orders administration.  
[![Deploy to Cloudflare](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/cloudflare/templates/tree/main/d1-starter-sessions-api-template)

Tip: Place your database further away for the read replication demo

To simulate how read replication can improve a worst case latency scenario, select your primary database location to be in a farther away region (one of the deployment steps).

You can find this in the **Database location hint** dropdown.

## Reference architectures

Explore the following reference architectures that use D1:

[Fullstack applicationsA practical example of how these services come together in a real fullstack application architecture.](https://developers.cloudflare.com/reference-architecture/diagrams/serverless/fullstack-application/)[Ingesting BigQuery Data into Workers AIYou can connect a Cloudflare Worker to get data from Google BigQuery and pass it to Workers AI, to run AI Models, powered by serverless GPUs.](https://developers.cloudflare.com/reference-architecture/diagrams/ai/bigquery-workers-ai/)[Composable AI architectureThe architecture diagram illustrates how AI applications can be built end-to-end on Cloudflare, or single services can be integrated with external infrastructure and services.](https://developers.cloudflare.com/reference-architecture/diagrams/ai/ai-composable/)[Serverless global APIsAn example architecture of a serverless API on Cloudflare and aims to illustrate how different compute and data products could interact with each other.](https://developers.cloudflare.com/reference-architecture/diagrams/serverless/serverless-global-apis/)[Retrieval Augmented Generation (RAG)RAG combines retrieval with generative models for better text. It uses external knowledge to create factual, relevant responses, improving coherence and accuracy in NLP tasks like chatbots.](https://developers.cloudflare.com/reference-architecture/diagrams/ai/ai-rag/)

```json
{"@context":"https://schema.org","@type":"WebPage","@id":"https://developers.cloudflare.com/d1/demos/#page","headline":"Demos and architectures · Cloudflare D1 docs","description":"Explore demo applications and reference architectures that use D1 databases.","url":"https://developers.cloudflare.com/d1/demos/","inLanguage":"en","image":"https://developers.cloudflare.com/dev-products-preview.png","dateModified":"2026-05-19","publisher":{"@type":"Organization","name":"Cloudflare","url":"https://www.cloudflare.com/"},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/d1/","name":"D1"}},{"@type":"ListItem","position":3,"item":{"@id":"/d1/demos/","name":"Demos and architectures"}}]}
```