Azure Cosmos DB Blog
The latest news, updates and technical insights from the Azure Cosmos DB team
Latest posts
Azure Cosmos DB at FOSSASIA Summit 2026: Sessions, Conversations, and Community
The FOSSASIA Summit 2026 was an incredible gathering of developers, open-source contributors, startups, and technology enthusiasts from across the region. This year, Azure Cosmos DB and Azure DocumentDB were present at the summit with both technical sessions and a dedicated booth, giving us a great opportunity to connect with the community and talk about building modern applications with cloud-native databases. A Personal Note This was my third time attending FOSSASIA, and it was special in many ways. It was also my first time attending the summit in Bangkok, Thailand, and the venue and overall experience w...
Now Generally Available: Cosmos DB Mirroring in Microsoft Fabric with Private Networks
We’re excited to announce the general availability of private network support for Azure Cosmos DB mirroring in Microsoft Fabric, enabling customers to replicate operational data into Fabric from Azure Cosmos DB accounts secured with private endpoints or virtual networks while continuing to operate within their existing network security models. As more organizations connect operational data with analytics and AI to power new insights and intelligent applications, the ability to do so securely has become increasingly important—making private network support a key capability for bringing operational data into Fabric...
A Look Ahead at Azure Cosmos DB Conf 2026: From AI Agents to Global Scale
Join us for Azure Cosmos DB Conf 2026, a free global, virtual developer event focused on building modern applications with Azure Cosmos DB. This year, Azure Cosmos DB Conf will feature 21 speakers from across the globe, bringing together Microsoft engineers, community leaders, architects, and developers to share how they are building modern applications with Azure Cosmos DB. Attendees will hear directly from experts using Azure Cosmos DB to power real systems—from AI agent memory architectures and retrieval-augmented generation pipelines to globally distributed event-driven micros...
Azure DocumentDB: A Fully Managed MongoDB-Compatible Database
Running MongoDB at scale eventually forces a trade-off: invest heavily in managing your own infrastructure or move to a managed service and risk losing the compatibility and portability your team depends on. Azure DocumentDB is a fully managed, MongoDB-compatible database on Azure, built on an MIT-licensed open-source engine that runs consistently across on-premises, hybrid, and cloud environments. Developers keep the skills and tooling they already have. Infrastructure teams get a pricing model built on compute and storage, with no licensing fees and no throughput unit calculations. Key Capabilities ...
Maximize Azure Cosmos DB Performance with Azure Advisor Recommendations
In the first post of this series, we introduced how Azure Advisor helps Azure Cosmos DB users uncover opportunities to optimize efficiency and make smarter decisions. This follow-up dives deeper into one of the most important categories of guidance: performance. If you've ever dealt with skewed workloads, unexpected RU consumption, or queries that don’t scale as expected, Azure Advisor surfaces exactly the insights you need to diagnose and improve them. In this post, you’ll learn what performance recommendations Advisor provides, why they matter, and how you can use them to enhance the speed, reliability, a...
Building AI-Powered Apps with Azure Cosmos DB and the Vercel AI SDK
The Vercel AI SDK is an open-source TypeScript toolkit that provides the core building blocks for integrating AI into any JavaScript application. It works with 20+ AI providers out of the box—including OpenAI, Azure OpenAI, Anthropic, Google, Mistral, and more—so you can write your code once and switch providers by changing a single import. At its core, the SDK handles streaming (responses appear word-by-word instead of making users wait), tool calling (allowing the AI to invoke your functions, such as querying a database), and multi-step agentic reasoning, where the AI chains multiple tool calls together to a...
How to Enable Microsoft Entra ID for Azure Cosmos DB (NoSQL)
Strengthen Identity Security and Eliminate Account Keys Identity is becoming the new security perimeter. As organizations modernize their cloud applications, long‑lived secrets and shared keys introduce unnecessary risk. Azure Cosmos DB now fully supports Microsoft Entra ID for both control plane and data plane access, giving customers a secure, passwordless, least‑privilege alternative to legacy key‑based authentication. This blog walks through why customers are moving to Entra ID, what changes when you disable local authentication, and how to configure modern RBAC for Cosmos DB. Why Move to Microsoft Entra...
Part 2: Building a Python CRUD API with Azure Functions and Azure Cosmos DB
Series: Building Serverless Applications with Azure Functions and Azure Cosmos DB In the first post of this series, we focused on establishing the fundamentals of serverless architecture by building and deploying a simple HTTP API using Azure Functions and FastAPI. The post centred on serverless compute, showing how Azure Functions handles execution, scaling, and infrastructure management while FastAPI provides a modern, developer-friendly API framework. In this post, we extend that foundation by introducing serverless data. You’ll build a Python-based CRUD inventory API and persist data using Azure Cosmos DB...
Azure Cosmos DB Data Explorer now supports Dark Mode
If you spend time in the Azure Portal’s using Azure Cosmos DB Data Explorer, you know it’s a “lots of screens, lots of tabs, lots of work happening” kind of place. So I’m excited to share a small upgrade that makes a big difference: Dark Mode is now supported in Cosmos DB Data Explorer. It just works with Azure Portal Dark Mode If you already have Dark Mode enabled in the Azure Portal, Data Explorer will automatically switch to dark with it. No extra setup, no separate preference buried in a panel somewhere. If you want to switch on the on demand, you can also use the sun/moon toggle in the Data Explorer...