{
  "app": {
    "id": "capp_whatitis_004",
    "topic": "what-it-is",
    "fact": "As of the October 21, 2025 update noted on the same announcement page, \"Artifacts now support MCP and persistent storage\" -- letting AI-powered apps read/write external services via Model Context Protocol and store data across sessions (up to 20MB per artifact, per the companion support tutorial).",
    "source_url": "https://claude.com/blog/build-artifacts",
    "fetched_at": "2026-07-02 06:01:02",
    "created_at": "2026-07-02 06:01:02",
    "cite_as": "https://subagentapps.com/api/apps/capp_whatitis_004"
  }
}