How to Override OpenAI Base URL in Cursor IDE: Ultimate 2026 Developer Guide

August 2, 2026 · 3 min read

AI API Gateway Docs

As AI-assisted software development becomes the industry standard, Cursor IDE has emerged as one of the most productive code editors available. However, developers frequently encounter strict rate limits, unexpected 429 Too Many Requests errors, or high monthly costs when relying solely on default API channels for top-tier models like Claude 3.5 Sonnet, GPT-4o, and DeepSeek V3.

Fortunately, Cursor IDE provides native support to Override OpenAI Base URL. By routing your requests through a unified API gateway like AI Supermarket, you can unlock unthrottled concurrency, drastically reduce API expenses, and access all major LLMs under a single API key.

Why Override OpenAI Base URL in Cursor IDE?

1. The Rate Limit Bottleneck

Official API providers enforce strict Tier 1 and Tier 2 rate limits based on Requests Per Minute (RPM) and Tokens Per Minute (TPM). During heavy refactoring sessions or multi-file codebase indexing in Cursor, you can easily hit these thresholds, resulting in freezing chat windows and broken code completions.

2. Eliminating Subscription Lock-In

Juggling separate $20/month subscriptions across multiple platforms quickly adds up. A unified gateway allows for a transparent pay-as-you-go model where you pay only for the exact token volume consumed across OpenAI, Anthropic, Google, and DeepSeek.

3. Multi-Model Flexibility in One Place

Instead of constantly re-configuring API keys when switching between models, a unified base URL lets you call claude-3-5-sonnet-20241022, gpt-4o, gemini-2.5-pro, and deepseek-chat seamlessly.

Feature & Cost Comparison

Metric / Feature	Direct Official API	AI Supermarket Gateway
Pricing Model	High Pay-As-You-Go / Tiered	Discounted Pay-As-You-Go
Subscription Requirement	$20/mo per provider	$0 Monthly Fee
Concurrency & Rate Limits	Strict RPM/TPM caps (Tier 1/2)	High-concurrency enterprise pools
Supported Models	Single provider per key	All top LLMs in 1 key
Free Trial Credits	None	Instant free test balance upon registration

Step-by-Step Guide: Overriding Base URL in Cursor IDE

Step 1: Obtain Your Endpoint and API Key

Navigate to AI Supermarket and complete registration.
Go to Dashboard → Tokens / API Keys.
Click Create New Token and copy your key (starts with sk-).
Note your custom base endpoint URL: https://aisupermarket.work/v1

Step 2: Configure Cursor IDE Settings

Launch Cursor IDE.
Open Settings (Ctrl + , / Cmd + ,).
Click Cursor Settings → Models.
Paste your API key and set Override OpenAI Base URL to: https://aisupermarket.work/v1

Production-Ready Code Snippets

import os
from openai import OpenAI
client = OpenAI(
    base_url="https://aisupermarket.work/v1",
    api_key=os.getenv("AI_SUPERMARKET_API_KEY", "sk-your-token-here")
)
response = client.chat.completions.create(
    model="claude-3-5-sonnet-20241022",
    messages=[{"role": "user": "Hello AI Supermarket Gateway!"}]
)
print(response.choices[0].message.content)

Frequently Asked Questions (FAQ)

Q: Will overriding OpenAI Base URL break inline editing (Cmd+K)?
No. Cursor inline editing uses standard OpenAI REST protocols and routes seamlessly through AI Supermarket.

Why Override OpenAI Base URL in Cursor IDE?​