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Unlocking the Codex harness: how we built the App Server
OpenAI describes how to embed the Codex agent using the Codex App Server, a bidirectional JSON-RPC API for streaming progress, tool use, approvals, and diffs.
From the source
Learn how to embed the Codex agent using the Codex App Server, a bidirectional JSON-RPC API powering streaming progress, tool use, approvals, and diffs.
openai.com
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- Announced
- 04 Feb 2026 13:00 UTC
- Detected
- 03 Aug 2026 21:11 UTC (+180d after)