GPT88 Agent Docs

Claude Code with gpt88.cc

How to use Claude Code with gpt88.cc for model access, OAuth login, plugins, and routing decisions.

The most common mistake in Claude Code is treating “model access” and “plugin login” as one problem. If you only need the model, API key mode is enough. If you need plugins or account features, you need OAuth.

What this page covers

  • How to route Claude Code model calls through gpt88.cc.
  • Why plugin capability is tied to OAuth instead of raw API key mode.
  • What should be cleaned before switching modes.

Preparation

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1. Decide whether you need model access or plugin capability
2. Prefer API key mode for pure model calls
3. Prefer OAuth mode for plugins and account-linked features
4. Clear old environment variables before switching modes
5. Use a minimal task to verify the switch

Quick setup

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1. Install Claude Code
2. Prepare either an API key or OAuth login
3. For gpt88.cc, use the compatible OpenAI/Claude routing mode
4. If you need plugin capability, use OAuth instead of API key login
5. Validate the toolchain with one minimal task first

Mode differences

  • API key mode: better for direct model routing through gpt88.cc.
  • OAuth mode: better for plugins, extensions, and ChatGPT account-linked features.

Verification

  1. Run one small task and confirm the model responds normally.
  2. If the plugin panel is missing, switch to the OAuth path.
  3. After switching, restart the session and verify no old environment variables remain.

Troubleshooting

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1. Plugins are unavailable
   - Confirm whether you are still in API key mode
   - If you need plugins, switch to OAuth

2. Repeated reconnect loops
   - Check proxy variables
   - Check whether an old session config is polluting the environment

3. Model calls fail
   - Check Base URL and API key first
   - Then verify the model name

Next steps