curl --request POST \
  --url https://www.zohoapis.com/pdfeditor/api/v1/pdf/compress \
  --header 'Authorization: Zoho-oauthtoken d92d4xxxxxxxxxxxxx15f52' \
  --header 'content-type: multipart/form-data' \
  -F 'file=@file_path' \
  -F 'input_options={
  "image_settings": {
    "color_images": {
      "enable_resize": true,
      "enable_dpi_reduction": true,
      "target_dpi": 150,
      "max_dimension": 1500,
      "convert_to_grayscale": false,
      "compression_type": "jpeg",
      "quality": 0.75,
      "deduplicate_images": true,
      "extract_inline_images": false
    },
    "grayscale_images": {
      "enable_resize": true,
      "enable_dpi_reduction": true,
      "target_dpi": 150,
      "max_dimension": 1500,
      "compression_type": "jpeg",
      "quality": 0.8,
      "deduplicate_images": true
    },
    "monochrome_images": {
      "enable_resize": false,
      "enable_dpi_reduction": true,
      "target_dpi": 300,
      "compression_type": "lossless",
      "quality": "lossless"
    }
  },
  "font_settings": {
    "deduplicate_fonts": true,
    "subset_fonts": true
  },
  "resource_optimization": {
    "remove_unused_resources": true,
    "deduplicate_streams": true,
    "compress_objects": true,
    "enable_stream_compression": true
  },
  "discard_objects": {
    "discard_form_fields": false,
    "flatten_form_fields": true,
    "discard_annotations": false,
    "discard_hidden_annotations": true,
    "discard_alternate_images": true,
    "discard_bookmarks": true,
    "discard_thumbnails": true,
    "discard_page_actions": true,
    "discard_open_actions": true,
    "discard_output_intents": true,
    "discard_optional_content_layers": true
  },
  "discard_user_data": {
    "discard_metadata": true,
    "discard_javascript": true,
    "discard_embedded_files": true,
    "discard_rich_media": true,
    "discard_accessibility_tags": false,
    "discard_private_application_data": true
  },
  "color_management": {
    "normalize_transparency": true,
    "force_rgb": true
  }
}' \
  -F 'password=OpenSesame123'

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.io.IOException;
import java.net.http.HttpTimeoutException;

public class Main {
  public static void main(String[] args) throws Exception{

    HttpRequest request = HttpRequest.newBuilder()
        .uri(URI.create("https://www.zohoapis.com/pdfeditor/api/v1/pdf/compress"))
        .header("content-type", "multipart/form-data")
        .header("Authorization", "Zoho-oauthtoken d92d4xxxxxxxxxxxxx15f52")
        .method("POST", HttpRequest.BodyPublishers.noBody())
        .build();
    HttpResponse response = HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.ofString());
    System.out.println(response.body());
  
  }
}
    

import http.client

conn = http.client.HTTPSConnection("www.zohoapis.com")

headers = {
    'content-type': "multipart/form-data",
    'Authorization': "Zoho-oauthtoken d92d4xxxxxxxxxxxxx15f52"
    }

conn.request("POST", "/pdfeditor/api/v1/pdf/compress", headers=headers)

res = conn.getresponse()
data = res.read()

print(data.decode("utf-8"))

    headersMap = Map();
    headersMap.put("Accept", "application/json");

    list_of_text=List();
    file=invokeurl
    [
      url : "public fileURL link"
      type : GET
    ];
    list_of_text.add({"paramName":"file","content":file,"stringPart":"false"});
    list_of_text.add({"paramName":"input_options","content":"[object Object]","stringPart":"true"});
    list_of_text.add({"paramName":"password","content":"OpenSesame123","stringPart":"true"});

    response = invokeUrl
    [
        url: "https://www.zohoapis.com/pdfeditor/api/v1/pdf/compress"
        type: POST
        headers: headersMap
        files: list_of_text
        connection: connection_name
    ]

    info response;