Azure Cosmos DB

Retirement: Azure Synapse Link for Azure Cosmos DB NoSQL

As of March 31, 2026, new Azure Cosmos DB NoSQL accounts can no longer enable Azure Synapse Link. Existing customers will remain fully supported until March 31, 2029, when Azure Synapse Link will reach end of life.

Generally Available: Azure Cosmos DB Linux emulator (vNext)

We are announcing the general availability of the Azure Cosmos DB Linux emulator (vNext), a cross-platform, Docker-based emulator for local development and testing against Azure Cosmos DB for NoSQL.

Public Preview: OmniVec, an open-source embedding toolkit for Azure

You can now automate embedding generation from multiple data sources into Azure Cosmos DB and other Azure destinations. Building AI applications often requires stitching together data extraction, embedding generation, and writing to vector databases into a custom pipeline.

Public Preview: Integrated embeddings for Azure Cosmos DB for NoSQL

Building AI applications on Azure Cosmos DB just got simpler. With integrated embeddings, now in public preview, Azure Cosmos DB for NoSQL can automatically generate and maintain embeddings for your data, without the need to build a separate pipeline.

Public Preview: Azure Backup for Cosmos DB

You can now enable vaulted backups for Azure Cosmos DB accounts, protecting mission-critical data with secure, isolated, and resilient backups.

Public Preview: Safe key rotation for Azure Cosmos DB

The safe key rotation feature helps you confidently rotate your Azure Cosmos DB account keys by providing visibility into when each key was last used.

Public Preview: Agent Memory Toolkit for Azure Cosmos DB

You can now accelerate the development of agentic applications with the new Agent Memory Toolkit for Azure Cosmos DB.

Public Preview: Semantic reranker in Azure Cosmos DB

You can now improve the relevance of any Cosmos DB query or search with the public preview of semantic reranker in Azure Cosmos DB.

Public Preview: Agentic Retrieval Toolkit for Azure Cosmos DB

We are announcing the public preview of the Agentic Retrieval Toolkit for Azure Cosmos DB. Motivated by GraphRAG and multiple-hop reasoning problems, this new capability helps you build advanced retrieval-augmented generation (RAG) applications that go beyond single-pass…

Generally Available: Azure Cosmos DB global secondary indexes

Global secondary indexes (GSIs) for Azure Cosmos DB are now generally available, giving you a powerful way to accelerate query performance without adding complexity to your application code.

Generally Available: Azure Cosmos DB all versions and deletes change feed mode

The Azure Cosmos DB all versions and deletes change feed mode is now generally available, giving you complete visibility into every change that happens in your containers.

Public Preview: New Azure Cosmos DB cost estimator

Plan your Azure Cosmos DB deployment with confidence. The Azure Cosmos DB cost estimator is now in public preview, giving you a fast, accurate way to model throughput, storage, regions, and capacity mode before you provision a single account.

Generally Available: Change partition keys in Azure Cosmos DB for NoSQL API

You can now change the partition key of an Azure Cosmos DB NoSQL container directly from the Azure portal with just a few clicks.

Generally Available: Agent kit for Azure Cosmos DB

Your AI coding agents just got smarter about building high-performance database applications. The Azure Cosmos DB Agent Kit is now generally available, bringing proven best practices directly into your development workflow.

Public Preview: Introducing AI Assistant in the Azure Cosmos DB extension for Visual Studio Code

You can now use AI assistance in the Azure Cosmos DB extension for Visual Studio Code to work with your data faster and with less manual effort.

Generally Available: MCP Toolkit for Azure Cosmos DB

You can use the MCP Toolkit for Azure Cosmos DB, now in general availability, to connect your AI agents and copilots to operational data with enterprise-ready reliability.

Generally Available: Per-partition automatic failover for Azure Cosmos DB

Per-partition automatic failover (PPAF) is now generally available in Azure Cosmos DB, bringing faster recovery and higher availability to your mission-critical applications. With PPAF, you no longer need to fail over an entire account during a regional disruption.

Public Preview: Azure Cosmos DB distributed transactions

Announcing the public preview of distributed transactions in Azure Cosmos DB. You can now perform atomic operations across items and partitions, with changes committing together or rolling back automatically on failure.

Public Preview: Relational Database to Azure Cosmos DB NoSQL Migration Assistant

You can now more easily migrate from relational databases such as Oracle, SQL Server, PostgreSQL, and MySQL to Azure Cosmos DB for NoSQL.

Generally Available: langchain-azure-cosmosdb python package for Azure Cosmos DB

You can now build production-ready AI and agent applications faster using the new LangChain and LangGraph integration for Azure Cosmos DB.