Holon

Holon UXC is a command-line interface designed to provide a unified entry point for discovering and invoking APIs and tools that operate across multiple protocols. It addresses the challenge of accessing and reusing schema-described remote capabilities by consolidating them into a single, reusable CLI workflow. UXC is intended for agents, automation scripts, skills, and local applications that need to interact with APIs and tools through a consistent interface.

The tool supports protocols including OpenAPI, MCP, GraphQL, gRPC, and JSON-RPC, allowing users to interact with a variety of systems without needing to adapt to different invocation methods. UXC offers a help-first discovery process, enabling users to explore available operations and arguments for a given host or operation. Invocation is structured, supporting key/value arguments, path-style nested arguments, per-field JSON with a special syntax, and positional JSON payloads. By default, UXC produces deterministic JSON output, with an option for text mode when preferred.

Additional features include the ability to manage reusable authentication credentials and endpoint bindings, which streamlines repeated interactions with remote systems. The tool also supports daemon-backed session reuse and background subscriptions, enhancing efficiency for ongoing tasks or integrations. For developers seeking local integration, a TypeScript daemon client is available to facilitate communication with the UXC daemon from within local applications.

UXC is delivered as a CLI tool, with documentation available through a public site that also exposes a shared skills directory. The platform is positioned as a solution for consistent, structured API and tool invocation across diverse protocols, making it suitable for users who require a standardized automation and integration workflow.