2026 Latest Tutorial: Ultimate Guide to Connecting Codex to MiniMax | CC Switch Local Routing Configuration Explained ​

Article overview: If you're searching for the latest, most stable solution for connecting Codex to MiniMax LLM, this guide provides a complete zero-to-one walkthrough. This article explains in detail how to use CC Switch's Local Routing feature to seamlessly connect MiniMax models to the Codex CLI tool. Whether you need protocol conversion for incompatible API formats, or want to manage API Keys securely and centrally, this CC Switch local routing guide will help you complete the configuration quickly and boost your development efficiency.

📖 Table of Contents ​

• Prerequisites: Environment & Tool Requirements
• Step 1: Add a Codex Provider in CC Switch
• Step 2: Enable Local Routing and Take Over Codex
• Step 3: Switch the Provider and Restart Codex
• Advanced: Configuring Other Chat-Format LLM Providers
• Troubleshooting (FAQ)

Prerequisites: Environment & Tool Requirements

Before starting to connect Codex to MiniMax models, make sure your local development system meets the following basic requirements (for best compatibility, we recommend CC Switch 3.16.0 or above):

• CC Switch client: properly installed and able to launch normally.
• Codex CLI environment: installed and run at least once locally, so that the ~/.codex/config.toml directory and config file have been automatically generated on your device.
• API credentials: obtain a valid official API Key from the MiniMax open platform.

Step 1: Add a Codex Provider in CC Switch

To let the Codex CLI correctly recognize and call MiniMax models, we first need to bind the provider in the CC Switch console.

1. Open your CC Switch client, look to the top, and switch to the dedicated Codex tab.
2. Click the "+" button in the top-right corner to add a new API provider.

3. In the built-in preset list that appears, search for and select MiniMax. Thanks to CC Switch's preset feature, you only need to complete these two simple steps:

• Accurately enter the MiniMax API Key you obtained from the official source.
• Click the Save Provider button at the bottom.

💡 Optimization tip: CC Switch's powerful preset mechanism has already built in MiniMax's official request URL, default preferred models, model list menu, and thinking/reasoning advanced parameters for you automatically. This dramatically simplifies the tedious steps of connecting Codex to MiniMax — no need to manually look up API documentation to map fields.

Step 2: Enable Local Routing and Take Over Codex

Since mainstream LLMs like MiniMax typically use an OpenAI-like Chat interface standard, we need to use CC Switch's Local Routing feature to perform the underlying protocol conversion so it's compatible with Codex.

When you click the MiniMax provider you just configured to enable local routing, the system will show a smart prompt: "This provider uses the OpenAI Chat interface format and requires the routing service to work properly. Please start the routing service first."

Follow these steps to configure route takeover and achieve seamless proxying:

1. Go to the Routing page in CC Switch settings and expand the Local Routing panel.
2. Turn on the routing master switch to start the local mapping service (the default listen address is usually 127.0.0.1:15721).
3. Enable Codex-specific takeover: if your current goal is simply to have Codex use this route, we recommend keeping the routing switches for other tools like Claude and Gemini off to avoid interference.

🔒 Key security advantage: once route takeover is complete, CC Switch points Codex's live config file directly to the local secure routing service and uses virtual placeholders to manage authentication. Your real, precious MiniMax API Key is stored encrypted in CC Switch's local config and is only injected automatically over the internal network when forwarding requests. This completely eliminates the security risk of exposing your API Key in plaintext in the Codex config file.

Step 3: Switch the Provider and Restart Codex

Return to Codex's provider list page, click the MiniMax provider you carefully configured, and decisively select Enable. (Note: if you see a "routing required" warning badge on the interface, this means the provider can only work while the routing service is running. If the routing service is unexpectedly turned off, CC Switch will show a friendly pop-up warning to intercept the problem.)

⚠️ Critical pitfall-avoidance step: after switching, we strongly recommend immediately restarting your current Codex session!

Here's why a restart is required:

• Refresh the model list cache: if you don't restart, Codex may cling to old cached data, so the model menu won't refresh when you type commands and will still show the old provider's model list.
• Reload the JSON catalog: CC Switch generates the latest model_catalog_json file, and Codex's /model menu usually needs a fresh process to read and reload it.

After restarting and re-entering Codex, you can directly type the /model command. At this point, you should clearly see that the currently enabled model has been successfully switched to your desired MiniMax preset (for example, the powerful MiniMax 2.7 series models).

Advanced: Configuring Other Chat-Format LLM Providers

Once you've mastered the technique of connecting Codex to MiniMax models, you can easily apply the same approach to others. Mainstream Chinese AI LLMs (such as Kimi, DeepSeek, SiliconFlow, etc.) also fully support quick configuration in CC Switch:

• Prefer built-in presets: CC Switch officially maintains and continuously updates built-in presets for all common Chat-format providers — one-click selection saves time and effort.
• Custom flexible configuration: only when a niche provider you're looking for isn't in the preset list should you choose "custom configuration." In that case, fill in the API Key, Base URL, and available models according to the corresponding official API documentation. Be sure to note: accurately select "API format" as OpenAI Chat Completions (routing required).
• Native direct-connect mode: if your upstream API provider is technically advanced and natively supports the OpenAI Responses API protocol, there's no need to enable local routing mapping at all. CC Switch can connect directly at the underlying level via the Responses protocol, avoiding the performance overhead of Chat conversion.

Troubleshooting (FAQ)

To help you quickly locate problems when you hit a snag, we've put together the following high-frequency error guide based on common developer search habits on search engines (such as Bing, Google):

1. After integration, Codex reports a 404 error, or says it can't find the /responses path?

• Troubleshooting: in most cases, this is because you haven't correctly enabled the Codex routing takeover switch in CC Switch, or you previously manually forced the upstream provider's Chat base URL into Codex's config.toml config file.
• Solution: open Codex and check the ~/.codex/config.toml file. Make sure the API endpoint has been taken over by CC Switch and points to the local routing service (e.g., [http://127.0.0.1:15721/v1](http://127.0.0.1:15721/v1)).

2. When connecting to MiniMax, the upstream API keeps reporting 404 errors?

• Troubleshooting: if you're using the built-in MiniMax preset, confirm that the provider is indeed an official preset and that the Codex local routing service shows as successfully enabled.
• Solution: if you manually connected using "custom provider" mode, carefully check how you filled in the Base URL. This field must be the API service's root address (Host) and must never include full endpoint suffixes like /chat/completions.

3. After typing the /model command in Codex, MiniMax models don't show up in the menu?

• Solution: after saving the provider config in CC Switch, you must restart the Codex process. Although CC Switch automatically generates cc-switch-model-catalog.json in milliseconds and writes it to the path, the currently running old Codex session doesn't support hot-reloading the model catalog — you must start a new process to force the refresh.

4. Local routing is already enabled, but API requests are still going to the old provider?

• Solution: carefully verify that the following three states are all consistent:

1. Under the Codex tab in CC Switch, the currently highlighted/selected provider is clearly MiniMax.
2. The "local routing service" green light in the CC Switch settings panel is on, showing it's running.
3. In the "routing enabled" settings detail, the Codex-specific switch is toggled On.

5. Can I use an official native OpenAI Codex account through local routing?

• Recommendation: strongly not recommended. In local routing takeover mode, CC Switch proactively blocks switching to the official OpenAI provider as a security protection mechanism. This is because accessing the official native API through a local proxy or protocol conversion can easily trigger OpenAI's strict risk-control system, creating a ban risk. CC Switch's local routing feature is primarily designed for third-party domestic LLMs, aggregated API platforms, or scenarios requiring protocol conversion (like MiniMax in this article).