Cursor 中转 API 配置：API Key、Base URL 与功能限制

直接答案：Cursor 配置中转 API 与网关预检

1. 打开 Cursor Settings > Models。
2. 找到官方支持的 provider，粘贴专用测试 Key，点击 Save。
3. 若当前版本显示 OpenAI-compatible Base URL override，按网关文档填写；官方没有公开统一的尾部路径规则。
4. 只选择一个 chat model 建立新会话，并用网关日志与用量核对请求。

export GPTZZZ_BASE_URL="https://gptzzz.ai/v1"
export GPTZZZ_API_KEY="YOUR_GPTZZZ_API_KEY"
export CURSOR_TEST_MODEL="gpt-5.5"

curl --fail-with-body -sS \
  "$GPTZZZ_BASE_URL/chat/completions" \
  -H "Authorization: Bearer $GPTZZZ_API_KEY" \
  -H "Content-Type: application/json" \
  -d "{\"model\":\"$CURSOR_TEST_MODEL\",\"messages\":[{\"role\":\"user\",\"content\":\"只回复 CURSOR_OK\"}],\"stream\":false}"

Windows PowerShell：

$env:GPTZZZ_BASE_URL = "https://gptzzz.ai/v1"
$env:GPTZZZ_API_KEY = "YOUR_GPTZZZ_API_KEY"
$env:CURSOR_TEST_MODEL = "gpt-5.5"

$body = @{
  model = $env:CURSOR_TEST_MODEL
  messages = @(@{ role = "user"; content = "只回复 CURSOR_OK" })
  stream = $false
} | ConvertTo-Json -Depth 5
Invoke-RestMethod -Method Post -Uri "$env:GPTZZZ_BASE_URL/chat/completions" `
  -Headers @{ Authorization = "Bearer $env:GPTZZZ_API_KEY" } `
  -ContentType "application/json; charset=utf-8" `
  -Body ([System.Text.Encoding]::UTF8.GetBytes($body))

import os
from openai import OpenAI

gateway = OpenAI(
    api_key=os.environ["GPTZZZ_API_KEY"],
    base_url=os.environ["GPTZZZ_BASE_URL"],
)
response = gateway.chat.completions.create(
    model=os.environ["CURSOR_TEST_MODEL"],
    messages=[{"role": "user", "content": "只回复 CURSOR_OK"}],
)
choice = response.choices[0]
if not choice.message.content or choice.finish_reason is None:
    raise RuntimeError(response.model_dump_json())
print(response.model, choice.finish_reason, response.usage.total_tokens)

这条 curl 只是网关 preflight，不是 Cursor API 调用。Cursor 官方没有提供让用户用 curl 调模型的“Cursor 中转 Endpoint”。