sdk.md Codex Docs, 2026-02-19 20:37 UTC → 2026-04-16 00:46 UTC

1# Codex SDK1# Codex SDK

2 2 

3Programmatically control local Codex agents

4 

5If you use Codex through the Codex CLI, the IDE extension, or Codex Web, you can also control it programmatically.3If you use Codex through the Codex CLI, the IDE extension, or Codex Web, you can also control it programmatically.

6 4 

7Use the SDK when you need to:5Use the SDK when you need to:

13 11 

14## TypeScript library12## TypeScript library

15 13 

16The TypeScript library provides a way to control Codex from within your application that is more comprehensive and flexible than non-interactive mode.14The TypeScript library provides a way to control Codex from within your application that's more comprehensive and flexible than non-interactive mode.

17 15 

18Use the library server-side; it requires Node.js 18 or later.16Use the library server-side; it requires Node.js 18 or later.

19 17 

59```57```

60 58 

61For more details, check out the [TypeScript repo](https://github.com/openai/codex/tree/main/sdk/typescript).59For more details, check out the [TypeScript repo](https://github.com/openai/codex/tree/main/sdk/typescript).

60 

61## Python library

62 

63The Python SDK is experimental and controls the local Codex app-server over JSON-RPC. It requires Python 3.10 or later and a local checkout of the open-source Codex repo.

64 

65### Installation

66 

67From the Codex repo root, install the SDK in editable mode:

68 

69```bash

70cd sdk/python

71python -m pip install -e .

72```

73 

74For manual local SDK usage, pass `AppServerConfig(codex_bin=...)` to point at a local `codex` binary, or use the repo examples and notebook bootstrap.

75 

76### Usage

77 

78Start Codex, create a thread, and run a prompt:

79 

80```python

81from codex_app_server import Codex

82 

83with Codex() as codex:

84 thread = codex.thread_start(model="gpt-5.4")

85 result = thread.run("Make a plan to diagnose and fix the CI failures")

86 print(result.final_response)

87```

88 

89Use `AsyncCodex` when your application is already asynchronous:

90 

91```python

92import asyncio

93 

94from codex_app_server import AsyncCodex

95 

96async def main() -> None:

97 async with AsyncCodex() as codex:

98 thread = await codex.thread_start(model="gpt-5.4")

99 result = await thread.run("Implement the plan")

100 print(result.final_response)

101 

102asyncio.run(main())

103```

104 

105For more details, check out the [Python repo](https://github.com/openai/codex/tree/main/sdk/python).