Close Bulk SMS

Send SMS through your Close account using your Close internal SMS numbers.
Close API error:
Close API connection failed: Unauthorized

How to use

  1. Create a NEW Close API key.
  2. Paste the new key at the very top of this file: $CLOSE_API_KEY
  3. Save the file as index.php.
  4. Upload it to your PHP hosting.
  5. Open the page in your browser.
  6. The page will automatically retrieve your SMS-enabled Close numbers.
  7. Upload your numbers.txt.
  8. Write your SMS.
  9. Select one or multiple sending numbers.
  10. TEST WITH 1 NUMBER first.
  11. If the test works, use SEND BULK SMS.
Security: Never share your Close API key. If an API key is exposed, revoke it and create a new one.