This paper introduces octave_toml11, an open-source extension package for GNU Octave that enables seamless parsing, querying, and manipulation of TOML (Tom's Obvious Minimal Language) configuration files. Designed to bridge the gap between numerical computing environments and modern data serialization standards, the package provides functions for index-based retrieval, key-value queries, data formatting, and type validation. Experimental results demonstrate its efficacy in handling nested TOML structures, with applications spanning parameter configuration for quantum computing simulations, aerospace engineering, and machine learning workflows.