Specifications | Real-Time SSL Certificate Chain Streaming | WhoisXML API


This data feed subscription is licensed to you or your organization only, you may not resell or relicense the data without explicit written permission from Whois API LLC. Any violation will be prosecuted to the fullest extent of the law.

Update time

The data is provided immediately after being processed by our system.

How to obtain data from the SSL Certificates Stream

  • First of all, you need an API key with a valid Real-Time SSL Certificate Chain Streaming subscription.
  • Connect to the wss://ssl-stream.whoisxmlapi.com/ultimate endpoint and send your API key as a first message:
  • $ websocat --no-line -B 1100000 wss://ssl-stream.whoisxmlapi.com/ultimate
    [INFO  websocat::stdio_threaded_peer] get_stdio_peer (threaded)
    [INFO  websocat::ws_client_peer] get_ws_client_peer
    [INFO  websocat::ws_client_peer] Connected to ws
  • In the example above, we used the websocat open source console utility. The “-B” parameter specifies the size of the buffer (a little over 1 MB is recommended).
  • We strongly recommend that you use WebSocket clients that comply with RFC 6455 and support ping-pong communication by default.