DuckDB GSheets is an experimental extension that allows users to read and write Google Sheets using SQL commands. It supports authentication through various methods, including access tokens and private keys, enabling seamless integration between DuckDB and Google Sheets. The extension is community-maintained and comes with specific usage guidelines and limitations.

Centia.io offers a secure SQL API that allows users to query data over HTTP or WebSocket with support for JSON-RPC methods. It features built-in security measures such as OAuth2, row-level security, and rate limiting, making it a developer-friendly solution backed by Postgres. The platform provides intuitive SDKs and a friendly CLI for data management.