An increase in OCR API failures

This is worth a try.  I have never used the TestComplete OCR features but you can make API calls in code to attempt to verify an API state/connection and do other testing.

I would think this would be a flakey network connection or maybe a license issue as rraghvani​ suggested.  Firewall issues are usually consistent failures and less likely.  It will either fail all the time or work.

Here is some JavaScript that may help.  I just took some code I had and inserted the SmartBear OCR api path.  This should return a failure code in a parsed JSON object. It will likely fail because you are not passing credentials (use resource Query?) to the API but you may be able to determine things about the api and the connection based on the response. 

function sendGetRequest() 
{
  let resourcePath =  https://ocr.api.dev.smartbear.com";
  let resourceQuery = "?someparametrer=1234";  // If needed?
  let url = resourcePath + resourceQuery;
  try 
  {
    // Send GET request
    let response = aqHttp.CreateRequest("GET", url, false).Send();
    // Check for successful response
    if (response.StatusCode === 200) 
    {
      // Parse JSON response
      let allData = JSON.parse(response.Text);
      Log.Message("Total records received: " + allData.length);
      // Process each record
      allData.forEach((record, index) => {
        Log.Message("Record " + (index + 1) + ": " + JSON.stringify(record));
      });
    } 
    else 
    {
      Log.Error("Failed to fetch data. Status code: " + response.StatusCode);
    }
  } 
  catch (error) 
  {
    Log.Error("Error during request or data processing: " + error.message);
  }
}

Have a read through post OCR Issues | SmartBear Community - I've responded with the following:

"Have a read through https://support.smartbear.com/testcomplete/docs/testing-with/object-identification/ocr/index.html. If I remember correctly, from reading other posts, OCR is now a web service (ocr.api.dev.smartbear.com). Either the web service is down; consumed x number of licenses or it's being blocked by the firewall."

Also, have you recently updated TestComplete?

Have you dropped the api url into a browser and just opened the page?  There is a wealth of info there!  😎  Just ensuring you get a valid return code from that page before a use of OCR may tell you a lot.