Couchbase Capella is a cloud-based Database-as-a-Service (DBaaS) that combines the capabilities of relational databases, like SQL and ACID transactions, with the flexibility and scalability of NoSQL, offering a fully managed JSON document database. Pydantic, a Python library, enhances the development process by allowing developers to define and validate custom JSON objects through type annotations, ensuring data integrity when interfacing with Capella. This blog provides a step-by-step guide for using Pydantic to create and validate JSON documents, which can then be upserted into Couchbase Capella using the Couchbase Python SDK. The process involves creating schema models in Pydantic for structured data, such as user posts and reviews, and demonstrates how to populate and insert these documents into a Capella cluster. The project is publicly available on GitHub for further exploration, and additional resources and tutorials are offered for those interested in learning more about using Capella and Pydantic together.