Great question—let’s unpack this because WhatsApp keeps their exact rate limit details pretty close to the chest, so most of this comes from real-world developer experience.

First off: Your current setup (≤10 requests spaced 1-2 minutes apart) should generally stay under the radar for throttling. But 429 errors popping up here mean there’s probably more going on than just the interval length. Here are the key factors to consider:

• Unintended duplicate requests: Browsers sometimes preload links automatically, or users might double-click the button before it disables. Even if you think you’re sending 10 requests, you could actually be sending more that count towards your limit.
• IP-based throttling: WhatsApp’s limits might be tied to the source IP, not individual user sessions. If multiple people are using your site from the same public IP (like a shared office or server), all those requests get lumped together—so 10 requests from one IP in 10 minutes might cross a threshold that 10 from separate IPs wouldn’t.
• Non-human request flags: If your button’s implementation looks automated (e.g., no clear user interaction context, scripted clicks), WhatsApp might throttle you more aggressively even with slow intervals.

So to directly answer your question: 1-2 minutes isn’t inherently too short for 10 requests, but it might not be enough if any of the above factors are at play. Here’s what you can do to fix it:

• Add a buffer to intervals: Try stretching gaps to 3-5 minutes between requests. This gives you a bigger safety net against any unstated rate limits.
• Debounce/disable the button: When a user clicks the WhatsApp button, immediately disable it for a few seconds to prevent accidental double-clicks. Also, check if your framework or browser is preloading the link—disable that if it is.
• Implement retry logic: If you get a 429, add an exponential backoff retry (e.g., wait 3 minutes first, then 6, then 12) instead of retrying immediately. This respects WhatsApp’s throttling signals.
• Validate request count: Use server-side logging to count exactly how many requests are being sent to WhatsApp from your IP. This will help you confirm if you’re actually staying under 10, or if hidden requests are pushing you over.

内容的提问来源于stack exchange，提问作者Илья