# OpenAI Agents SDK vs Codex CLI

Both are open source harness options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence.

| | OpenAI Agents SDK | Codex CLI |
| --- | --- | --- |
| Licence | Open source | Open source |
| Pricing | usage based | paid |
| Self-hostable | No | No |
| Languages | Python, TypeScript | Any language |
| Install | pip install openai-agents | npm install -g @openai/codex |
| Keys required | OPENAI_API_KEY | OPENAI_API_KEY |

## Full pages

- https://newagent.build/c/openai-agents-sdk
- https://newagent.build/c/codex-cli

## Machine interfaces

- `GET https://newagent.build/api/registry` — every component as JSON
- `GET https://newagent.build/api/vendors` — vendors, with the repo and releases feed to watch
- `GET https://newagent.build/api/advise?q=<plain english>` — recommended stack for a description
- `GET https://newagent.build/api/stack?<layer>=<id>&format=sh|json|md|yml|agents|env` — a stack as files
- `GET https://newagent.build/llms.txt` — the whole registry in one fetch

Any page here also returns markdown if you send `Accept: text/markdown`.