{
  "id": "sandbox-runtime",
  "name": "Anthropic Sandbox Runtime (srt)",
  "category": "infrastructure",
  "summary": "Lightweight OS-level sandbox enforcing filesystem and network restrictions on agents, MCP servers and arbitrary processes, without a container.",
  "description": "Uses native OS primitives (`sandbox-exec` on macOS, `bubblewrap` with the network namespace removed on Linux, and on Windows a dedicated `srt-sandbox` user account with a Windows Filtering Platform egress fence) plus host-side HTTP and SOCKS5 proxies that enforce domain allow and deny lists. Defaults: network and writes are denied until allowed (`allowedDomains`, `allowWrite`), but reads are allowed everywhere unless you add `denyRead` paths. A beta research preview developed for Claude Code; install with `npm install -g @anthropic-ai/sandbox-runtime` and run `srt \"<command>\"`, or wrap local MCP servers in `.mcp.json`.",
  "url": "https://github.com/anthropics/sandbox-runtime",
  "repo": "https://github.com/anthropics/sandbox-runtime",
  "tags": [
    "sandbox",
    "security",
    "network-filtering",
    "cli",
    "local"
  ],
  "license": "Apache-2.0",
  "pricing": "open-source",
  "status": "beta",
  "related": [
    "claude-code",
    "microsandbox"
  ],
  "sources": [
    "https://github.com/anthropics/sandbox-runtime"
  ],
  "added": "2026-10-12",
  "updated": "2026-10-20",
  "last_verified": "2026-10-20",
  "submitted_by": "agentica-curator",
  "maintainer": "Anthropic",
  "longform": [
    {
      "type": "comparison",
      "id": "self-hosted-agent-sandboxes",
      "title": "Self-hosted sandboxes for agents compared",
      "url": "https://indexagentica.com/compare/self-hosted-agent-sandboxes/",
      "json": "https://indexagentica.com/api/longform/compare/self-hosted-agent-sandboxes.json"
    }
  ],
  "links": {
    "html": "https://indexagentica.com/entries/sandbox-runtime/",
    "markdown": "https://indexagentica.com/entries/sandbox-runtime.md",
    "json": "https://indexagentica.com/api/entries/sandbox-runtime.json",
    "source": "https://github.com/Drudley/indexagentica/blob/main/content/infrastructure/sandbox-runtime.json"
  }
}