diff --git a/src/ocrd_network/cli/client.py b/src/ocrd_network/cli/client.py
index fe87d01fbf..c2b6c500d1 100644
--- a/src/ocrd_network/cli/client.py
+++ b/src/ocrd_network/cli/client.py
@@ -1,9 +1,9 @@
 import click
+from json import dumps, loads
 from typing import Optional
-
 from ocrd.decorators import parameter_option
-from ocrd_network import Client
 from ocrd_utils import DEFAULT_METS_BASENAME
+from ..client import Client
 
 
 @click.group('client')
@@ -43,7 +43,7 @@ def processing_cli():
 @click.option('--callback-url')
 @click.option('--agent-type', default='worker')
 @click.option('-b', '--block-till-job-end', default=False)
-def send_processing_request(
+def send_processing_job_request(
     address: Optional[str],
     processor_name: str,
     mets: str,
@@ -73,13 +73,13 @@ def send_processing_request(
         req_params["result_queue_name"] = result_queue_name
     if callback_url:
         req_params["callback_url"] = callback_url
-
     client = Client(server_addr_processing=address)
-    response = client.send_processing_request(processor_name=processor_name, req_params=req_params)
-    processing_job_id = response.get('job_id', None)
+    processing_job_id = client.send_processing_job_request(
+        processor_name=processor_name, req_params=loads(dumps(req_params)))
+    assert processing_job_id
     print(f"Processing job id: {processing_job_id}")
     if block_till_job_end:
-        pass
+        client.poll_job_status_till_timeout_fail_or_success(processing_job_id)
 
 
 @client_cli.group('workflow')
diff --git a/src/ocrd_network/client.py b/src/ocrd_network/client.py
index 688651f7de..333ec7fa44 100644
--- a/src/ocrd_network/client.py
+++ b/src/ocrd_network/client.py
@@ -1,8 +1,8 @@
-from json import dumps, loads
-from requests import post as requests_post
+
 from ocrd_utils import config, getLogger, LOG_FORMAT
 
-from .constants import NETWORK_PROTOCOLS
+from .client_utils import (
+    poll_job_status_till_timeout_fail_or_success, post_ps_processing_request, verify_server_protocol)
 
 
 class Client:
@@ -10,19 +10,13 @@ def __init__(self, server_addr_processing: str = config.OCRD_NETWORK_SERVER_ADDR
         self.log = getLogger(f"ocrd_network.client")
         self.server_addr_processing = server_addr_processing
         verify_server_protocol(self.server_addr_processing)
+        self.polling_tries = 900
+        self.polling_wait = 30
 
-    def send_processing_request(self, processor_name: str, req_params: dict):
-        req_url = f"{self.server_addr_processing}/processor/{processor_name}"
-        req_headers = {"Content-Type": "application/json; charset=utf-8"}
-        req_json = loads(dumps(req_params))
-        self.log.info(f"Sending processing request to: {req_url}")
-        self.log.debug(req_json)
-        response = requests_post(url=req_url, headers=req_headers, json=req_json)
-        return response.json()
-
+    def poll_job_status_till_timeout_fail_or_success(self, job_id: str) -> str:
+        return poll_job_status_till_timeout_fail_or_success(
+            ps_server_host=self.server_addr_processing, job_id=job_id, tries=self.polling_tries, wait=self.polling_wait)
 
-def verify_server_protocol(address: str):
-    for protocol in NETWORK_PROTOCOLS:
-        if address.startswith(protocol):
-            return
-    raise ValueError(f"Wrong/Missing protocol in the server address: {address}, must be one of: {NETWORK_PROTOCOLS}")
+    def send_processing_job_request(self, processor_name: str, req_params: dict) -> str:
+        return post_ps_processing_request(
+            ps_server_host=self.server_addr_processing, processor=processor_name, job_input=req_params)
diff --git a/src/ocrd_network/client_utils.py b/src/ocrd_network/client_utils.py
index 96fab03372..651dc5cf6b 100644
--- a/src/ocrd_network/client_utils.py
+++ b/src/ocrd_network/client_utils.py
@@ -1,6 +1,6 @@
 from requests import get as request_get, post as request_post
 from time import sleep
-from .constants import JobState
+from .constants import JobState, NETWORK_PROTOCOLS
 
 
 def _poll_endpoint_status(ps_server_host: str, job_id: str, job_type: str, tries: int, wait: int):
@@ -29,7 +29,7 @@ def poll_wf_status_till_timeout_fail_or_success(ps_server_host: str, job_id: str
 
 def get_ps_processing_job_status(ps_server_host: str, processing_job_id: str) -> str:
     request_url = f"{ps_server_host}/processor/job/{processing_job_id}"
-    response = request_get(url=request_url, headers={"accept": "application/json"})
+    response = request_get(url=request_url, headers={"accept": "application/json; charset=utf-8"})
     assert response.status_code == 200, f"Processing server: {request_url}, {response.status_code}"
     job_state = response.json()["state"]
     assert job_state
@@ -38,7 +38,7 @@ def get_ps_processing_job_status(ps_server_host: str, processing_job_id: str) ->
 
 def get_ps_workflow_job_status(ps_server_host: str, workflow_job_id: str) -> str:
     request_url = f"{ps_server_host}/workflow/job-simple/{workflow_job_id}"
-    response = request_get(url=request_url, headers={"accept": "application/json"})
+    response = request_get(url=request_url, headers={"accept": "application/json; charset=utf-8"})
     assert response.status_code == 200, f"Processing server: {request_url}, {response.status_code}"
     job_state = response.json()["state"]
     assert job_state
@@ -47,7 +47,11 @@ def get_ps_workflow_job_status(ps_server_host: str, workflow_job_id: str) -> str
 
 def post_ps_processing_request(ps_server_host: str, processor: str, job_input: dict) -> str:
     request_url = f"{ps_server_host}/processor/run/{processor}"
-    response = request_post(url=request_url, headers={"accept": "application/json"}, json=job_input)
+    response = request_post(
+        url=request_url,
+        headers={"accept": "application/json; charset=utf-8"},
+        json=job_input
+    )
     assert response.status_code == 200, f"Processing server: {request_url}, {response.status_code}"
     processing_job_id = response.json()["job_id"]
     assert processing_job_id
@@ -58,10 +62,20 @@ def post_ps_processing_request(ps_server_host: str, processor: str, job_input: d
 def post_ps_workflow_request(ps_server_host: str, path_to_wf: str, path_to_mets: str) -> str:
     request_url = f"{ps_server_host}/workflow/run?mets_path={path_to_mets}&page_wise=True"
     response = request_post(
-        url=request_url, headers={"accept": "application/json"}, files={"workflow": open(path_to_wf, "rb")})
+        url=request_url,
+        headers={"accept": "application/json; charset=utf-8"},
+        files={"workflow": open(path_to_wf, "rb")}
+    )
     # print(response.json())
     # print(response.__dict__)
     assert response.status_code == 200, f"Processing server: {request_url}, {response.status_code}"
     wf_job_id = response.json()["job_id"]
     assert wf_job_id
     return wf_job_id
+
+
+def verify_server_protocol(address: str):
+    for protocol in NETWORK_PROTOCOLS:
+        if address.startswith(protocol):
+            return
+    raise ValueError(f"Wrong/Missing protocol in the server address: {address}, must be one of: {NETWORK_PROTOCOLS}")
diff --git a/tests/network/test_integration_6_client.py b/tests/network/test_integration_6_client.py
index 55168d8322..c1fe5ab260 100644
--- a/tests/network/test_integration_6_client.py
+++ b/tests/network/test_integration_6_client.py
@@ -1,9 +1,7 @@
-from click.testing import CliRunner
-
 from src.ocrd_network.constants import AgentType, JobState
 from tests.base import assets
 from tests.network.config import test_config
-from ocrd_network.cli.client import client_cli
+from ocrd_network.client import Client
 
 PROCESSING_SERVER_URL = test_config.PROCESSING_SERVER_URL
 
@@ -11,20 +9,19 @@
 def test_client_processing_processor():
     workspace_root = "kant_aufklaerung_1784/data"
     path_to_mets = assets.path_to(f"{workspace_root}/mets.xml")
-    runner = CliRunner()
-    result = runner.invoke(
-        client_cli,
-        args=[
-            "processing", "processor", "ocrd-dummy",
-            "--address", PROCESSING_SERVER_URL,
-            "--mets", path_to_mets,
-            "--input-file-grp", "OCR-D-IMG",
-            "--output-file-grp", "OCR-D-DUMMY-TEST-CLIENT",
-            "--agent-type", AgentType.PROCESSING_WORKER
-        ]
-    )
-    # TODO: Do a better result check
-    assert result.output.count(f"{JobState.success}") == 1
+    client = Client(server_addr_processing=PROCESSING_SERVER_URL)
+    req_params = {
+        "path_to_mets": path_to_mets,
+        "description": "OCR-D Network client request",
+        "input_file_grps": ["OCR-D-IMG"],
+        "output_file_grps": ["OCR-D-DUMMY-TEST-CLIENT"],
+        "parameters": {},
+        "agent_type": AgentType.PROCESSING_WORKER
+    }
+    processing_job_id = client.send_processing_job_request(processor_name="ocrd-dummy", req_params=req_params)
+    assert processing_job_id
+    print(f"Processing job id: {processing_job_id}")
+    assert JobState.success == client.poll_job_status_till_timeout_fail_or_success(processing_job_id)
 
 
 def test_client_processing_workflow():