I will close this API on 2022-02-28T29:59:59Zโˆ’0800 because costs money and time which I donโ€™t want to spend on this project: Iโ€™m tired. If you watch these docs after that date the API wonโ€™t work.


Validate RFC from the SAT.

๐Ÿ•‘ Average Latency ~640 ms ๐Ÿ•‘ Worst Latency ~1000 ms ๐Ÿง‘โ€โš–๏ธ Success Rate 80%

Getting started

  1. Log in, and go to settings, and copy API Key. If you use email, we need to verify it. Check your inbox.
  2. You either can test directly in your browser or use Postman. Remember substitute API Key.


GET <>



If successful, this method returns a response body with the following structure:

  "isBlockList": "boolean",
	"isLRFC": "boolean"

Example Request


Example Success Response

    "rfcBlockListStatus": null,
    "isLRFC": false,


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