Cursor

Cursor is an AI-powered code editor that can connect to SilvaMux Coding Plan.

Before You Start

  1. Purchase a subscription: buy a Coding Plan Personal subscription (Lite / Pro / Max with monthly, quarterly, or yearly billing) on the subscription page; it takes effect immediately after payment.
  2. Create a subscription API key: in the console, go to Coding Plan → API Keys, create a key, and copy the full value starting with cp_live_ right away.
  3. Confirm endpoints and protocols: all tools share the Base URL https://www.silvamux.com/api/coding-plan/v1, compatible with both the OpenAI and Anthropic protocols; see Endpoints & Protocols for endpoint details.
A cp_live_ key can only call the /api/coding-plan/v1 subscription endpoints; using it on regular endpoints (such as /api/v1/chat/completions) returns 403 CODING_PLAN_KEY_NOT_ALLOWED; conversely, a regular sk_live_ key cannot call the subscription endpoints.

For the full flow of purchasing, key creation, and a verification call, see Quick Start.

Install Cursor

Download and install Cursor from the Cursor website.

Cursor Pro or higher is required. The free plan supports only Auto mode and cannot use custom models.

Configure Credentials

In Cursor, click the settings icon and go to Cursor Settings → Models. Enable OpenAI API Key and Override OpenAI Base URL, and fill in:

SettingValue
API Keyyour cp_live_ subscription key
Base URLhttps://www.silvamux.com/api/coding-plan/v1
Modeldeepseek-v4-pro (available models follow GET /api/coding-plan/v1/models)

In Add or search model, type the model name (for example deepseek-v4-pro) and click Add Custom Model. Then turn off Auto in the chat panel and select the model from the dropdown.

FAQ

Error: The model does not work with your current plan or api key

The Cursor free plan supports only Auto mode and cannot call custom models. Upgrade to Cursor Pro or higher.

The added model is not found after configuration

Turn off Auto in the chat panel, then select the model from the dropdown.

Error: We're having trouble connecting to the model provider or Unauthorized User API key

Check each item:

  • Verify the API key, Base URL, and model name; a cp_live_ key must be paired with https://www.silvamux.com/api/coding-plan/v1.
  • Confirm the model is in the list returned by GET /api/coding-plan/v1/models.

429 on calls

When any subscription quota window is exhausted, calls return 429 QUOTA_EXCEEDED (the message identifies 5h / weekly / monthly). Wait for the window to recover, or check remaining quota in the console.