How to Configure HolySheep API in Cursor: Base URL Migration and Troubleshooting Guide

Problem Background

Cursor, the AI-powered code editor, relies on external AI API providers for its Copilot++ features. By default, it connects to OpenAI's endpoints, but many developers migrate to API relay services like HolySheep to reduce costs, access multiple providers through a single endpoint, or bypass regional restrictions. HolySheep provides an OpenAI-compatible interface with support for Claude, Gemini, DeepSeek, and other models through a unified base URL structure.

The core engineering challenge is that Cursor requires manual configuration to point to a custom API endpoint instead of the default OpenAI gateway. This guide covers the complete setup process, code-based alternatives, and real-world troubleshooting for developers integrating HolySheheep's relay infrastructure.

Use Cases

This configuration is relevant when you need to:

- Route Cursor's AI requests through HolySheep to consolidate spending across multiple AI providers - Access Claude or Gemini models within Cursor when direct API access is restricted or cost-prohibitive - Implement rate limiting and fallback logic through HolySheep's middleware rather than building your own - Migrate existing Cursor configurations from one API provider to HolySheep without rewriting integration code - Debug API response inconsistencies by inspecting traffic through a single logging endpoint

Configuration Steps

Step 1: Obtain HolySheep API Credentials

Register at https://www.holysheep.ai/register and generate an API key from your dashboard. HolySheep provides keys with configurable permissions and usage limits at the project level.

Step 2: Locate Cursor's API Settings

Cursor stores API configuration in your local settings file. Access it through **Settings → Models → OpenAI API Base URL** or edit the JSON configuration directly:

{
  "api": {
    "openai": {
      "baseURL": "https://api.holysheep.ai/v1",
      "apiKey": "your-holysheep-key-here"
    }
  }
}

Step 3: Verify Connectivity

Test the connection by running a simple API call. The following curl command validates that your HolySheep endpoint accepts requests:

curl https://api.holysheep.ai/v1/models \
  -H "Authorization: Bearer YOUR_HOLYSHEEP_API_KEY" \
  -H "Content-Type: application/json"

A successful response returns a JSON array of available models. If you receive a 401 error, your API key is invalid or expired. A 403 error indicates the key lacks permissions for this endpoint.

Code Examples

Python: Direct Integration with HolySheep

This example demonstrates how to use the OpenAI Python SDK with HolySheep as the