# Harness tools: Tools your coding agent can call

Connect an MCP server, install a command-line program with checked downloads, or add a command or a hook to your harness. Every tool here names its source, its licence and what it may touch before your agent downloads it.

Your agent spends less time searching and installing when the tool, its settings and its checks arrive together. Each download is one tool at an exact version, so a setup that works today works the same way next week.

## Groups

- [MCP server settings](https://baltor.ai/tools/mcp-server-settings): Connection entries for MCP servers, written for Claude Code, Codex, Cursor and OpenCode, with the package each one starts and the variables it reads.
- [Command-line programs](https://baltor.ai/tools/command-line-programs): Install recipes with the published checksum for each platform and a typed wrapper that checks arguments before the program runs.
- [Slash commands](https://baltor.ai/tools/slash-commands): Saved prompts your harness runs as commands: debugging, reviews, changelogs, audits, refactors and migrations, each from its source repository.
- [Hooks](https://baltor.ai/tools/hooks): Scripts your harness runs before or after a step: block risky commands, check for secrets, enforce commit messages, format and lint after edits.
- [Tested functions](https://baltor.ai/tools/tested-functions): One upstream Python function at a time, copied with the code it needs and a test: validators, parsers and formatters your agent can import.
- [3D and game file checkers](https://baltor.ai/tools/3d-file-checkers): Standard-library checkers for glTF and Godot files that catch what an engine drops or misreads, compared with Godot 4.7.2 and Blender 5.2.1.

Every component is the exact version the Baltor library release of October 9, 2026 serves. Your agent downloads it through Baltor with Pro, $49 a month: https://baltor.ai/get-started