MCXLcompatible

MCXLcompatible is an open specification developed to provide a standardized interface between software applications that utilize the Monte Carlo X-Library (MCXL) framework. The specification defines a set of API contracts, data formats, and communication protocols that allow disparate MCXL‑based systems to exchange simulation results, configuration settings, and performance metrics without proprietary dependencies. The standard was first published by the Monte Carlo Software Consortium in 2021, following a period of fragmented implementations that prevented seamless integration across research groups and industry solutions.

The core of MCXLcompatible is its lightweight exchange layer, which is built on JSON‑over‑HTTP. It supports versioning, optional authentication, and schema validation to ensure that exchanges remain backward‑compatible even as new simulation capabilities are added. Key features include support for batch job submission, real‑time status polling, and a standardized metadata schema for describing mesh resolution, stochastic parameters, and convergence criteria. Implementations may also expose a plugin system that allows developers to extend the protocol with custom data types or specialized metrics.

Adoption of MCXLcompatible has increased the interoperability of particle‑transport codes used in fields such as nuclear engineering, medical physics, and atmospheric science. The specification is maintained by an open‑source community that holds bi‑annual working groups to discuss proposed extensions and to audit reference implementations. Because the protocol relies on widely supported web technologies, developers can integrate MCXLcompatible capabilities into both legacy and cloud‑based architectures, enabling large‑scale, distributed Monte Carlo workflows across institutional boundaries.