Codex (Beta) - concentrate

Codex is currently unsupported and this integration is not functional at this time.

Concentrate and Codex

Codex is a command-line coding assistant from OpenAI that supports OpenAI-compatible APIs. By pointing Codex at Concentrate, you get a number of important advantages over connecting to OpenAI directly.

Unified Spend Management

Concentrate offers centralized budget management for groups and companies. You can prevent unforeseen cost overruns and assign limits to team members all through the Concentrate dashboard. This is particularly helpful if many developers use Codex throughout your company.

Observability and Insights

With Concentrate, you can monitor all of your team’s Codex activity through the dashboard. This includes usage statistics, top spenders, providers and models, latency and more.

Prerequisites

Before you begin, ensure you have:

A Concentrate AI account with an active API key (starts with sk-cn)
Codex CLI installed

Quick Setup

Bash

curl -fsSL https://concentrate.ai/scripts/setup-codex.sh | bash

Verify Installation

After running the setup script:

Restart your terminal or source your shell profile:

# For bash (Linux)
source ~/.bashrc
# For bash (macOS)
source ~/.bash_profile
# For zsh
source ~/.zshrc

Launch Codex:
codex
The CLI should start without errors and show your configured model.

Manual Setup

If you prefer to configure Codex manually or the automated script doesn’t work for your environment:

Set your API key

Add the following to your shell profile (~/.bashrc, ~/.zshrc, etc.):

export CONCENTRATE_API_KEY="sk-cn-v1-..."

Then reload your shell:

source ~/.bashrc  # or ~/.zshrc

Configure ~/.codex/config.toml

Create or edit ~/.codex/config.toml:

model_provider = "concentrate"
model = "openai/gpt-5.3-codex"

[model_providers.concentrate]
name = "concentrate"
base_url = "https://api.concentrate.ai/v1"
env_key = "CONCENTRATE_API_KEY"

Verify the connection

Launch Codex in a project directory:

cd /path/to/project
codex

You should see the model name from your config displayed and be able to interact with the assistant.

Remove Concentrate AI

Bash

curl -fsSL https://concentrate.ai/scripts/uninstall-codex.sh | bash

Troubleshooting

API key not found error

If you see an error about a missing API key:

Verify the environment variable is set:
echo $CONCENTRATE_API_KEY
Make sure you’ve sourced your shell profile:
source ~/.bashrc # or appropriate file
Confirm env_key in your config.toml is set to "CONCENTRATE_API_KEY" (not "OPENAI_API_KEY")

Invalid API key error

If your API key is rejected:

Verify the key in your dashboard
Ensure there are no extra spaces or quotes in the environment variable
Check that the key starts with sk-cn

Connection errors

If you cannot connect to the API:

Verify base_url in your config.toml is set correctly:
base_url = "https://api.concentrate.ai/v1"

Test the connection manually:

curl https://api.concentrate.ai/v1/models \
  -H "Authorization: Bearer $CONCENTRATE_API_KEY"

Check your internet connection and firewall settings

Next Steps

Codex CLI on GitHub

View source, report issues, and follow development

Available Models

Browse all supported models

API Reference

Explore the full API capabilities

Get Support

Contact our support team

​Concentrate and Codex

​Unified Spend Management

​Observability and Insights

​Prerequisites

​Quick Setup

​Verify Installation

​Manual Setup

​Remove Concentrate AI

​Troubleshooting

​Next Steps

Codex CLI on GitHub

Available Models

API Reference

Get Support

Concentrate and Codex

Unified Spend Management

Observability and Insights

Prerequisites

Quick Setup

Verify Installation

Manual Setup

Remove Concentrate AI

Troubleshooting

Next Steps