429 too many requests with clean npm install on free plan

I got rate-limited for trying to use the cli to install all packages from my package.json:

⠏ Looking up data for 760 packages(node:67363) MaxListenersExceededWarning: Possible EventTarget memory leak detected. 31 abort listeners added to [AbortSignal]. MaxListeners is 30. Use events.setMaxListeners() to increase limit
(Use `node --trace-warnings ...` to show where the warning was created)
⠹ npm error Socket API POST request failed (429): Too Many Requests
npm error A complete log of this run can be found in: /path/to/.npm/_logs/2025-11-28T13_17_29_504Z-debug-0.log

Seems very unusual that such a basic npm feature doesn't work. I'm on a free plan, could that be it?

首先，使用包含许多包的 package.json 重现 CLI 安装，并检查与报告的 Socket API POST 429 相关的请求路径。将其行为与较小的安装和警告输出进行比较；当报告的包集合能够在免费计划上完成干净安装且不会意外触及速率限制时，即视为完成。