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JSON-RPC Protocols

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Building on the Codex Harness — Dominik Kundel, OpenAI Oct 9, 2026 · 18:08 Learn how to build sophisticated AI agents using the Codex App Server. This open-source JSON-RPC protocol provides deep control over the Codex harness, enabling custom tools and multi-threaded operations.

AI Engineer

Building on the Codex Harness — Dominik Kundel, OpenAI

Learn how to build sophisticated AI agents using the Codex App Server. This open-source JSON-RPC protocol provides deep control over the Codex harness, enabling custom tools and multi-threaded operations.

Read article