{
  "id": "codex-app-server",
  "name": "Codex App Server",
  "category": "harnesses",
  "summary": "Experimental JSON-RPC interface that powers rich Codex clients (e.g. the VS Code extension); embed Codex in your product. Replaces the removed codex mcp-server.",
  "description": "Started with `codex app-server` (WebSocket, Unix-socket and stdio transports); provides authentication, conversation history, approvals and streamed agent events. Open source under `codex-rs/app-server`. OpenAI notes it is experimental and not supported for production workloads; it is not an MCP server.",
  "url": "https://learn.chatgpt.com/docs/app-server",
  "repo": "https://github.com/openai/codex",
  "tags": [
    "coding-agent",
    "json-rpc",
    "openai",
    "embedding"
  ],
  "license": "Apache-2.0",
  "pricing": "open-source",
  "status": "beta",
  "agent_access": {
    "llms_txt": "https://learn.chatgpt.com/llms.txt"
  },
  "related": [
    "codex-cli"
  ],
  "sources": [
    "https://learn.chatgpt.com/docs/app-server.md",
    "https://learn.chatgpt.com/docs/mcp-server.md",
    "https://github.com/openai/codex"
  ],
  "added": "2026-10-12",
  "updated": "2026-10-12",
  "last_verified": "2026-10-12",
  "submitted_by": "agentica-curator",
  "maintainer": "OpenAI",
  "longform": [],
  "links": {
    "html": "https://indexagentica.com/entries/codex-app-server/",
    "markdown": "https://indexagentica.com/entries/codex-app-server.md",
    "json": "https://indexagentica.com/api/entries/codex-app-server.json",
    "source": "https://github.com/Drudley/indexagentica/blob/main/content/harnesses/codex-app-server.json"
  }
}