<\/span><\/h2>\nIf your MEXC API registration returns an invalid phone number error, your first number is likely burned. Don’t try to resurrect it and request a new number through the API immediately. But here’s the catch: add a 5\u201310 second delay between requests to avoid triggering rate-limit blocks from MEXC’s side. Going too fast makes you look like a bot, and bots get blocked.<\/span><\/p>\nLet’s break down the implementation steps:<\/span><\/p>\nUse a fresh session:<\/b> Start a new MEXC registration session. Reusing a burned number in a new attempt will fail again. Close the old session before requesting a new number. It’s like clearing the table before you start cooking again.<\/span><\/p>\nParameter changes:<\/b> If your first attempt used a US number, try a Canadian (+1) or UK (+44) number for your second API request. Different country code pools have independent flagging systems. What’s blocked in one region might work perfectly in another.<\/span><\/p>\nSoft vs. hard failures:<\/b> MEXC sometimes returns invalid for numbers that are actually valid but temporarily blocked. Wait 15 minutes and retry the same number before requesting a new one. This saves you from burning a number unnecessarily. It’s worth the wait.<\/span><\/p>\nLog the error code:<\/b> Capture the exact error response from MEXC’s API; it often specifies whether the problem is format-related or a blocklist hit. This helps you diagnose whether to change the format or the number. Data beats guessing every time.<\/span><\/p>\nImplement retry logic:<\/b> In your code, automatically request a new PVAPins number if the MEXC API response contains invalid or rejected. This automates the recovery flow without manual intervention. Your integration should be smart enough to handle this on its own.<\/span><\/p>\n<\/span>MEXC API: How to Poll SMS for OTP After an Invalid Phone Number Error<\/b><\/span><\/h2>\nSo you’ve got a new number, and MEXC accepted it. Good. Now you actually need to retrieve that SMS code. Use the request ID from your number request to check for incoming messages. PVAPins’ API fetches the OTP and returns it in the response when it arrives. No email forwarding, no manual copying.<\/span><\/p>\nHere are the polling best practices that’ll save you time:<\/span><\/p>\nPoll endpoint:<\/b> Use the getSms method with your request_id. PVAPins returns the SMS body, including the OTP code, once it’s received. The response is structured and easy to parse; no regex gymnastics required.<\/span><\/p>\nPolling interval:<\/b> Poll every 5\u201310 seconds for up to 3 minutes. MEXC typically sends the code within 30 seconds, but SMS delays happen. Don’t poll faster than every 5 seconds; you’ll hit rate limits and annoy everyone involved.<\/span><\/p>\nHandle timeouts:<\/b> If no SMS arrives after 180 seconds, cancel the number via the API and request a fresh one. Don’t wait indefinitely; delivery failures happen, and a new number is faster than debugging a dead one. Cut your losses and move on.<\/span><\/p>\nCorrelate with MEXC’s resend button:<\/b> If you click Resend Code on MEXC, the new SMS overwrites the old one. Make sure your polling picks up the latest message and doesn’t accidentally process a stale code. Old codes are useless and sometimes worse than no code at all.<\/span><\/p>\nIdempotent polling:<\/b> Your integration should handle duplicate SMS messages gracefully, only process the first OTP and ignore subsequent ones. This prevents race conditions when multiple messages arrive. It’s a small detail that prevents big bugs.<\/span><\/p>\n<\/span>MEXC API: How to Retry with a New Number After an Invalid Error<\/b><\/span><\/h2>\nA retry isn’t just requesting another number; it’s about changing your approach. The number that failed is now associated with your IP, so a successful retry requires a new number AND ideally a fresh MEXC session or a new IP if you’re using a residential proxy. Doing the same thing twice and expecting different results is the definition of insanity.<\/span><\/p>\nHere’s what a smart retry strategy looks like:<\/span><\/p>\nChange your IP:<\/b> If you have a VPN or proxy, switch to a different IP before retrying. MEXC correlates failed attempts with IP addresses, and repeated failures from the same IP can trigger a temporary flag. It’s not paranoia; it’s how fraud detection works.<\/span><\/p>\nUse a different country:<\/b>
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