LongCat Setup

Add LongCat to Chatbox, verify your API key, select an available model, and resolve endpoint or quota errors.

Prepare Your Account

Create an API Key on the LongCat Platform, then check the Usage page to make sure your account has enough token quota.

Configure LongCat

  1. Open Settings → Model Provider → Add.
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On mobile, tap the menu in the top-left corner to expand the sidebar before opening Settings.
Open LongCat provider settings (Desktop)
Open Model Provider settings
  1. Search for and select LongCat.
Open LongCat provider settings (Desktop)
Open Model Provider settings
  1. Paste your LongCat API Key into API Key. The API Host is pre-filled and normally does not need changes.
LongCat provider configuration (Desktop)
Configure LongCat
  1. Click Check next to the API Key.
Check LongCat API connection (Desktop)
Check the LongCat connection
  1. Select an available LongCat model from the model list to start chatting.
LongCat model selection (Desktop)
Select a LongCat model

Troubleshooting

Check your API quota and model availability in the LongCat console. For a custom OpenAI-compatible provider, the documented endpoint is https://api.longcat.chat/openai/v1/chat/completions; avoid omitting /openai or duplicating /v1.

Related guides

All providers · Choose a provider · Connection troubleshooting

Provider reference

LongCat