Cursor

Connect Lawthropic API in Cursor - about 2-3 minutes.

What you need

Parameter	Value
API Key	sk-law-*** (from your order)
Endpoint	https://lawthropic.xyz/v1
Custom model	claude-opus-4.8
Balance	lawthropic.xyz/dashboard

Step 1 - Open settings

Cursor → click Settings next to your profile avatar.

Step 2 - API Keys

Left sidebar: Models → API Keys → expand the section.

Step 3 - OpenAI API Key

Enable OpenAI API Key and paste your key (sk-law-...).

Step 4 - Override OpenAI Base URL

Enable Override OpenAI Base URL and set:

https://lawthropic.xyz/v1

Step 5 - Add custom model

1. Scroll up → View all models
2. Scroll down → Add Custom Model
3. Name: claude-opus-4.8
4. Save

In Cursor chat, select claude-opus-4.8.

Why claude-opus-4.8 instead of claude-opus?

Cursor ships built-in Claude Opus models that route through Cursor's servers, not your API key.

If you pick built-in Opus, Cursor ignores your key and endpoint.

claude-opus-4.8 is a separate model name. Cursor sends requests to your endpoint with your key. On our side it's full Opus.

Other models (optional)

Cursor name	Model
claude-opus-4.8	claude-opus-4.8
claude-sonnet-5	claude-sonnet-5
claude-haiku-4.5	claude-haiku-4.5
claude-sonnet-4.6	claude-sonnet-4.6

For Opus we recommend claude-opus-4.8 to avoid clashing with Cursor's built-in models.