Configure Trae with a third-party API

The Trae editor natively supports connecting to a third-party API (the Anthropic-compatible protocol), with no plugin to install and no config file to write — the simplest way to connect a third-party API of any editor. It supports both official Claude models and Chinese large models (GLM, Qwen, DeepSeek, Kimi, etc.).

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Configuration steps

1. Open Trae and go to Settings → Models → Add Model
2. Set Provider to Anthropic
3. Set Model to Custom Model (at the bottom of the dropdown), then enter the model name in the Model ID box below (see the common-models table below)
4. Set the Custom request URL to:

   https://api.lmuai.com/v1/messages

5. Set the API key to the key you generated in the LMU AI console (starts with sk-)
6. Click Confirm to save, then switch to that model to start using it

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Example: configuring a Chinese model (GLM-5.1)

The screenshot below uses GLM-5.1 as an example of how to fill in a custom model. Note that you must pick Custom Model in the Model dropdown and then type the model ID manually; the request URL is always https://api.lmuai.com/v1/messages:

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Common models reference

Official Claude models

Chinese large models (pick Custom Model and type the ID manually)

The models actually available are determined by the Available Models list in the LMU AI console; for the full list, see the Model Gallery.

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Common issues

Native method or the Codex plugin?

• Native method (this page): uses the Anthropic protocol and takes just a few clicks in the GUI — best for users who want models like Claude / GLM / Qwen
• Codex plugin method: uses the OpenAI protocol and requires a hand-written config file — best for users who want the GPT / Codex series

The two approaches can coexist — if you want to use both kinds of model, just set up both.

Why does the request URL need to end in /v1/messages?

Trae's Custom request URL requires the full endpoint (unlike tools such as Chatbox, which append the path automatically). The Anthropic protocol's chat endpoint is always /v1/messages, so the full URL is https://api.lmuai.com/v1/messages.

Where do I find model IDs?

See the full list of available models in the Model Gallery. Click any card to copy its model ID and paste it directly into Trae's Model ID box.

No response or an error after adding?

• Is the provider set to Anthropic (not OpenAI)?
• Did you pick Custom Model in the model dropdown and then type the model ID manually?
• Does the request URL end in /v1/messages?
• Is the API key the sk- key generated in the LMU AI console?

Save and restart the Trae client once.

Last updated: 2026-08-26