Temporal Nexus is a newly introduced feature of the Temporal Platform designed to facilitate seamless connectivity across teams and applications by enabling durable execution, integrated observability, and improved security within and across isolated namespaces. It addresses limitations of existing workflow integrations, such as high coupling and security risks, by providing a framework that abstracts Temporal primitives with clean service contracts and supports reliable execution with at-least-once and exactly-once guarantees. Nexus leverages Temporal's queue-based Worker architecture to streamline debugging, monitoring, and collaboration, while also eliminating the need for custom APIs and webhooks. It provides automatic retries, circuit breaking, rate limiting, and load balancing, enhancing the reliability of operations. Available in both open-source and Temporal Cloud, Nexus offers a familiar programming model for building and using services that support both synchronous and asynchronous operations, with plans for future enhancements including multi-cloud connectivity and expanded SDK support.