cloud/environments.md Codex Docs, 2026-02-19 20:37 UTC → 2026-03-17 00:33 UTC

1# Cloud environments1# Cloud environments

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3Customize dependencies and tools for Codex

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5Use environments to control what Codex installs and runs during cloud tasks. For example, you can add dependencies, install tools like linters and formatters, and set environment variables.3Use environments to control what Codex installs and runs during cloud tasks. For example, you can add dependencies, install tools like linters and formatters, and set environment variables.

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7Configure environments in [Codex settings](https://chatgpt.com/codex/settings/environments).5Configure environments in [Codex settings](https://chatgpt.com/codex/settings/environments).

83Internet access is available during the setup script phase to install dependencies. During the agent phase, internet access is off by default, but you can configure limited or unrestricted access. See [agent internet access](https://developers.openai.com/codex/cloud/internet-access).81Internet access is available during the setup script phase to install dependencies. During the agent phase, internet access is off by default, but you can configure limited or unrestricted access. See [agent internet access](https://developers.openai.com/codex/cloud/internet-access).

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85Environments run behind an HTTP/HTTPS network proxy for security and abuse prevention purposes. All outbound internet traffic passes through this proxy.83Environments run behind an HTTP/HTTPS network proxy for security and abuse prevention purposes. All outbound internet traffic passes through this proxy.

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87[Previous

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89Overview](https://developers.openai.com/codex/cloud)[Next

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91Internet Access](https://developers.openai.com/codex/cloud/internet-access)