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Introduction

Cursor is an AI-powered code editor. By integrating with LeapX API, you get powerful AI assistance for code generation, completion, explanation, and optimization. LeapX API now supports Cursor Agent capabilities (Auto Apply / multi-file editing, etc.) when configured properly.

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Quick Setup

Important: Currently, Cursor has official restrictions for using third-party API keys (including LeapX API). You must meet the following requirements:
  • Must have an active Pro Plan (paid subscription). Free Plan cannot use third-party API keys
  • Requires VPN/proxy configuration to connect to third-party API services
  • This is an official Cursor policy restriction, not a limitation of LeapX API

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1. Open Settings

Click the gear icon ⚙️ in the top right, select Models.

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2. Configure API

  • OpenAI API Key: Enter your LeapX API key
  • Override OpenAI Base URL: Check and enter https://api.leapx-hub.com/v1
  • Click Verify to validate
  • LeapX API is compatible with Cursor Agent (Auto Apply, etc.). To enable Agent, pick models that support Agent.
  • For GPT family, prefix model name with openai/. For example, use openai/gpt-5.2 instead of gpt-5.2. Other providers keep their original model IDs.

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3. Agent Mode Tips

  • Use Agent-capable models (e.g., Claude, DeepSeek, Grok, and GPT with openai/ prefix)
  • Ensure Base URL is https://api.leapx-hub.com/v1
  • On first enable, try a small change to verify auto-apply in Cursor sidebar
  • If a model doesn’t support Agent, fall back to Chat and apply manually

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Add Custom Models

Add in Cursor settings:

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Usage Modes

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Chat Mode Workflow

  1. Generate code: Ctrl/Cmd + L to open chat, describe requirements
  2. Apply code: Copy and paste to target file, or use “Apply” button
  3. Iterate: Continue conversation for modifications

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Alternatives Comparison

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Core Features

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Smart Code Completion

  • Tab completion: Press Tab to accept suggestions
  • Multi-line: Function-level code generation
  • Context-aware: Precise suggestions based on project

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AI Chat

  • Ctrl/Cmd + K: Open command palette
  • Ctrl/Cmd + L: Open sidebar chat
  • Code explanation: Select code and ask AI

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Code Editing

  • Generate: Describe requirements, AI generates code
  • Refactor: Get optimization suggestions
  • Fix errors: AI helps locate and fix issues

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Shortcuts

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Tips

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Provide Clear Context

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Optimize Prompts

  • Bad: "Fix this function"
  • Good: "Fix the floating point precision issue in calculateTotal function, ensure amounts are accurate to 2 decimal places"

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Troubleshooting

  • Check network connection
  • Verify API URL is https://api.leapx-hub.com/v1
  • Validate API key
  • Check account balance
  • Try switching models
  • Restart Cursor
  • Provide more project context
  • Use more specific prompts
  • Switch to better performing model

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Best Practices

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Project Config

Create .cursor-settings.json in project root:

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Code Review

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About Agent Mode

For auto multi-file editing and complex refactoring, consider:
  • Cline: VS Code plugin with full Agent functionality
  • RooCode: Emerging VS Code AI Agent plugin