OpenIntegrations/docs/en/examples/HTTPClient/SetBinaryBody.txt

    URL = "https://bin.openintegrations.dev";
    URL = URL + "/post";

    Image = "https://hut.openintegrations.dev/test_data/picture.jpg"; // URL, Path or Binary Data

    Result = OPI_HTTPRequests.NewRequest()
        .Initialize(URL)
        .SetBinaryBody(Image) // <---
        .ProcessRequest("POST")
        .ReturnResponseAsJSONObject();