Codex CLI

Codex speaks the Responses protocol. Private AI Proxy configures it automatically.

With Private AI Proxy

Install Private AI Proxy, sign in, and turn on Protected.
On the Agents screen, connect Codex and pick a model from the verified catalog.
Start codex.

The app adds a custom model provider to ~/.codex/config.toml that points at its local API with an agent-scoped token, and restores the file when you disconnect or stop Protected. From the CLI, the same connection is:

pap agents connect codex

Without the Proxy

Add RedPill as a custom provider in the user-level configuration; Codex ignores model_provider and model_providers in a project-local .codex/config.toml.

export REDPILL_AI_API_KEY="YOUR_API_KEY"

~/.codex/config.toml

model = "openai/gpt-5.6-sol"
model_provider = "redpill"

[model_providers.redpill]
name = "RedPill AI"
base_url = "https://api.redpill.ai/v1"
env_key = "REDPILL_AI_API_KEY"
wire_api = "responses"

Pick the model from GET /v1/models; choose one that declares tools. This path does not verify ACI locally. For confidential-only routing, use an is_tee: true model with base_url = "https://tee.redpill.ai/v1". See Verified ACI clients.

Check the connection

Start codex and run one bounded tool task. With the Proxy, the provider in config.toml points at http://127.0.0.1:4180/v1; without it, at https://api.redpill.ai/v1.

Troubleshooting

Symptom	Check
Codex ignores the Proxy	Confirm Connected in the app and that Protected is on, then restart `codex`.
Codex still uses the default provider	Confirm `model_provider = "redpill"` is at the top level of the user-level file.
Chat works but tools fail	Choose a model that declares `tools` in the live catalog.

Get Started

Use in Agents

Build with the API

How It Works

RedPill Chat

With Private AI Proxy

Without the Proxy

Check the connection

Troubleshooting

References

​With Private AI Proxy

​Without the Proxy

​Check the connection

​Troubleshooting

​References

With Private AI Proxy

Without the Proxy

Check the connection

Troubleshooting

References