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Kilntainers MCP Server

@Kiln-AI

代码仓库

基本信息

分类

其他

传输方式

stdio

作者

Kiln-AI

提交者

Steve Cosman

关于 Kilntainers MCP Server

Kilntainers is an MCP server that gives LLM agents isolated Linux sandboxes for executing shell commands.

#containers#docker#podman#modal#e2b

Kilntainers MCP Server 配置

使用下面的配置,将此服务器添加到你的 MCP 客户端。

{
  "mcpServers": {
    "kilntainers": {
      "command": "kilntainers"
    }
  }
}

Kilntainers MCP Server 工具

工具列表暂未提供

当前收录暂时没有可展示的工具列表，不代表服务没有工具。请查阅项目文档了解支持的能力。

工具是从 README 中自动提取的。维护者可以在 ## Tools 标题下列出工具,即可填充这部分内容。

概览

What is Kilntainers?

Kilntainers is an MCP server that gives LLM agents isolated Linux sandboxes for executing shell commands. It supports multiple backends including local containers (Docker, Podman), cloud-hosted micro-VMs (Modal, E2B), and WebAssembly sandboxes (WASM BusyBox or custom WASM modules).

How to use Kilntainers?

Install via uv tool install kilntainers (optionally with [wasm] for WASM backends). Run the server from CLI with kilntainers; by default it uses Docker and Debian slim. Add the server to an MCP client by specifying "command": "kilntainers" in the MCP configuration. The single MCP tool sandbox_exec lets the agent run any Linux command.

Key features of Kilntainers

  • Multiple backends: Docker, Podman, Modal, E2B, and WASM.
  • Isolated per agent – each MCP connection gets its own sandbox.
  • Ephemeral sandboxes – cleaned up automatically when the session ends.
  • Secure design – agent communicates with sandbox, not inside it.
  • Single MCP tool: sandbox_exec for running any command.
  • Scalable from laptop to thousands of parallel cloud sandboxes.

Use cases of Kilntainers

  • Letting agents use Linux utilities like grep, find, jq to save tokens.
  • Running thousands of parallel agents with isolated, ephemeral environments.
  • Safe command execution without exposing host OS or agent secrets.
  • GPU-accelerated sandboxes via Modal for compute-heavy agent tasks.

常见问题

1

What backends are available?

Docker (or Podman), Modal, E2B, Go BusyBox WASM, and custom WASM modules. Each backend is selected via the `--backend` flag.

2

How does Kilntainers ensure security?

The agent communicates *with* the sandbox over MCP but does not run inside it. Agent secrets (API keys, prompts, code) are never exposed to the sandbox, preventing exfiltration via prompt injection.

3

What are the runtime requirements?

Python 3.13+ is required. The Docker backend needs Docker or Podman installed. Modal and E2B backends require accounts and authentication with those services. WASM backends need the optional `[wasm]]` dependency (+15 MB).

4

What transports does Kilntainers support?

Two MCP transports: `stdio` (default) and `http` (streaming HTTP mode). In HTTP mode, a single server can host many sandboxes in parallel.

5

How do I authenticate with cloud backends?

Modal: use `modal setup` CLI or provide `--modal-token-id`/`--modal-token-secret` flags. E2B: provide `--e2b-api-key` flag or the `E2B_API_KEY` environment variable.

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