We introduce MPIF (Material Preparation Information File), a standardized format for recording materials synthesis data for MOFs and related materials. It captures detailed experimental procedures and conditions in a structured, machine-readable format, enabling consistent reporting of synthesis workflows. This improves reproducibility, transparency, and data sharing across laboratories. By establishing a common standard for synthesis reporting, MPIF aims to transform how the MOF community records, shares, and analyzes synthesis data, enabling large-scale data-driven discovery and accelerating progress toward automated and AI-assisted materials research.