diff --git a/poc/bin/kapow b/poc/bin/kapow
index 0dd3b0c..93ddd68 100755
--- a/poc/bin/kapow
+++ b/poc/bin/kapow
@@ -16,11 +16,12 @@
 # limitations under the License.
 #
 
-from urllib.parse import urlparse
 from itertools import repeat
+from urllib.parse import urlparse
 from uuid import uuid4
 import asyncio
 import io
+import json
 import logging
 import os
 import shlex
@@ -278,15 +279,32 @@ def append_route(app):
     async def _append_route(request):
         """Create a new Kapow! route."""
         app.router._frozen = False
-        content = await request.json()
+
+        try:
+            content = await request.json()
+        except Exception as exc:
+            return web.Response(status=400, reason="Malformed JSON")
+
         name = "ROUTE_" + str(uuid4()).replace('-', '_')
-        app.router.add_route(content["method"],
-                             content["url_pattern"],
-                             handle_route(content["entrypoint"],
-                                          content["command"]),
-                             name=name)
-        print(f'Route created {content["method"]} {content["url_pattern"]}')
-        return web.json_response(name)
+        try:
+            app.router.add_route(content["method"],
+                                 content["url_pattern"],
+                                 handle_route(content["entrypoint"],
+                                              content["command"]),
+                                 name=name)
+        except KeyError as exc:
+            missing = list()
+            for field in ("method", "url_pattern", "entrypoint", "command"):
+                if field not in content:
+                    missing.append(field)
+            return web.Response(status=422,
+                                reason="Missing Mandatory Field",
+                                body=json.dumps({"missing_mandatory_fields": missing}))
+        except ValueError as exc:
+            return web.Response(status=422, reason="Invalid Route Spec")
+        else:
+            print(f'Route created {content["method"]} {content["url_pattern"]}')
+            return web.json_response(name, status=201)
     return _append_route
 
 
diff --git a/poc/dist/kapow-0.0.1-py3.7.egg b/poc/dist/kapow-0.0.1-py3.7.egg
new file mode 100644
index 0000000..4bc98c7
Binary files /dev/null and b/poc/dist/kapow-0.0.1-py3.7.egg differ
diff --git a/spec/test/Makefile b/spec/test/Makefile
index 49b8678..f90954f 100644
--- a/spec/test/Makefile
+++ b/spec/test/Makefile
@@ -1,5 +1,7 @@
+wip:
+	pipenv run behave --stop --wip
 test:
 	gherkin-lint
-	pipenv run behave --no-capture --stop
+	pipenv run behave --no-capture
 catalog:
 	pipenv run behave --steps-catalog
diff --git a/spec/test/features/control/append/error_malformed.feature b/spec/test/features/control/append/error_malformed.feature
index 1cf657f..4c4f9f0 100644
--- a/spec/test/features/control/append/error_malformed.feature
+++ b/spec/test/features/control/append/error_malformed.feature
@@ -8,7 +8,7 @@ Feature: Kapow! server reject append requests with malformed JSON bodies.
     the server will respond with a bad request error.
 
     Given I have a running Kapow! server
-    When I try to append with this JSON document:
+    When I try to append with this malformed JSON document:
       """
       {
         "method" "GET",
@@ -20,5 +20,5 @@ Feature: Kapow! server reject append requests with malformed JSON bodies.
       }
       """
     Then I get 400 as response code
-      And I get "Malformed JSON" as response phrase
+      And I get "Malformed JSON" as response reason phrase
       And I get an empty response body
diff --git a/spec/test/features/control/insert/error_malformed.feature b/spec/test/features/control/insert/error_malformed.feature
index 40e50b2..c5951dd 100644
--- a/spec/test/features/control/insert/error_malformed.feature
+++ b/spec/test/features/control/insert/error_malformed.feature
@@ -21,5 +21,5 @@ Feature: Kapow! server reject insert requests with malformed JSON bodies.
       }
       """
     Then I get bad request as response code
-      And I get "Malformed JSON" as response phrase
+      And I get "Malformed JSON" as response reason phrase
       And I get an empty response body
diff --git a/spec/test/features/steps/comparedict.py b/spec/test/features/steps/comparedict.py
new file mode 100644
index 0000000..7b5f968
--- /dev/null
+++ b/spec/test/features/steps/comparedict.py
@@ -0,0 +1,38 @@
+from functools import singledispatch
+
+
+def assert_same_type(f):
+    def wrapper(a, b):
+        if type(a) != type(b):
+            raise TypeError("Non-matching types")
+        return f(a, b)
+    return wrapper
+
+
+@singledispatch
+@assert_same_type
+def is_subset(model, obj):
+    return model == obj
+
+
+@is_subset.register(dict)
+@assert_same_type
+def _(model, obj):
+    for key, value in model.items():
+        if key not in obj or not is_subset(value, obj[key]):
+            return False
+    return True
+
+
+@is_subset.register(list)
+@assert_same_type
+def _(model, obj):
+    if type(model) != type(obj):
+        raise TypeError("Non-matching types")
+    return is_subset(set(model), set(obj))
+
+
+@is_subset.register(set)
+@assert_same_type
+def _(model, obj):
+    return model <= obj
diff --git a/spec/test/features/steps/steps.py b/spec/test/features/steps/steps.py
index c95a2d1..f8c4df9 100644
--- a/spec/test/features/steps/steps.py
+++ b/spec/test/features/steps/steps.py
@@ -1,12 +1,15 @@
-import subprocess
+from contextlib import suppress
 from time import sleep
+import json
 import shlex
 import socket
-from contextlib import suppress
+import subprocess
 
 import requests
-from environconfig import EnvironConfig, StringVar, IntVar
+from environconfig import EnvironConfig, StringVar, IntVar, BooleanVar
+from comparedict import is_subset
 
+import logging
 
 class Env(EnvironConfig):
     #: How to run Kapow! server
@@ -20,9 +23,30 @@ class Env(EnvironConfig):
 
     KAPOW_BOOT_TIMEOUT = IntVar(default=10)
 
-@given('I have a just started Kapow! server')
-@given('I have a running Kapow! server')
-def step_impl(context):
+    KAPOW_DEBUG_TESTS = BooleanVar(default=True)
+
+
+if Env.KAPOW_DEBUG_TESTS:
+    # These two lines enable debugging at httplib level
+    # (requests->urllib3->http.client) You will see the REQUEST,
+    # including HEADERS and DATA, and RESPONSE with HEADERS but without
+    # DATA.  The only thing missing will be the response.body which is
+    # not logged.
+    try:
+        import http.client as http_client
+    except ImportError:
+        # Python 2
+        import httplib as http_client
+    http_client.HTTPConnection.debuglevel = 1
+
+    # You must initialize logging, otherwise you'll not see debug output.
+    logging.basicConfig()
+    logging.getLogger().setLevel(logging.DEBUG)
+    requests_log = logging.getLogger("requests.packages.urllib3")
+    requests_log.setLevel(logging.DEBUG)
+    requests_log.propagate = True
+
+def run_kapow_server(context):
     context.server = subprocess.Popen(
         shlex.split(Env.KAPOW_SERVER_CMD),
         stdout=subprocess.DEVNULL,
@@ -44,6 +68,11 @@ def step_impl(context):
 
     assert open_ports, "API is unreachable after KAPOW_BOOT_TIMEOUT"
 
+@given('I have a just started Kapow! server')
+@given('I have a running Kapow! server')
+def step_impl(context):
+    run_kapow_server(context)
+
 
 @when('I request a routes listing')
 def step_impl(context):
@@ -58,13 +87,7 @@ def step_impl(context):
 
 @given('I have a Kapow! server whith the following routes')
 def step_impl(context):
-    context.server = subprocess.Popen(
-        Env.KAPOW_SERVER_CMD,
-        stdout=subprocess.DEVNULL,
-        stderr=subprocess.DEVNULL,
-        shell=True)
-    is_running = context.server.poll() is None
-    assert is_running, "Server is not running!"
+    run_kapow_server(context)
 
     if not hasattr(context, 'table'):
         raise RuntimeError("A table must be set for this step.")
@@ -97,30 +120,32 @@ def step_impl(context):
     if not hasattr(context, 'table'):
         raise RuntimeError("A table must be set for this step.")
 
-    for row in context.table:
-        response = requests.post(f"{Env.KAPOW_CONTROLAPI_URL}/routes",
-                                 json={h: row[h] for h in row.headings})
-        response.raise_for_status()
+    row = context.table[0]
+    context.response = requests.post(f"{Env.KAPOW_CONTROLAPI_URL}/routes",
+                                     json={h: row[h] for h in row.headings})
 
 
 @then('I get {code} as response code')
 def step_impl(context, code):
-    raise NotImplementedError('STEP: Then I get unprocessable entity as response code')
+    assert context.response.status_code == int(code), f"Got {context.response.status_code} instead"
 
 
 @then('I get "{reason}" as response reason phrase')
 def step_impl(context, reason):
-    raise NotImplementedError('STEP: Then I get "Missing Mandatory Field" as response phrase')
+    assert context.response.reason == reason, f"Got {context.response.reason} instead"
 
 
 @then('I get the following entity as response body')
 def step_impl(context):
-    raise NotImplementedError('STEP: Then I get the following entity as response body')
+    for row in context.table:
+        for name, value in row.items():
+            assert name in context.response.json(), f"Field {name} not present in {context.response.json()}"
+            assert set(json.loads(value)) == set(context.response.json()[name])
 
 
 @then('I get an empty response body')
 def step_impl(context):
-    raise NotImplementedError('STEP: Then I get an empty response body')
+    assert context.response.content == b'', f"Response body is not empty. Got {context.response.content} instead."
 
 
 @when('I delete the route with id "{id}"')
@@ -132,6 +157,16 @@ def step_impl(context, id):
 def step_impl(context, id):
     raise NotImplementedError('STEP: Given It has a route with id "xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx"')
 
+
 @when('I insert the route')
 def step_impl(context):
     raise NotImplementedError('STEP: When I insert the route')
+
+
+@when('I try to append with this malformed JSON document')
+@when('I try to append with this JSON document')
+def step_impl(context):
+    context.response = requests.post(
+        f"{Env.KAPOW_CONTROLAPI_URL}/routes",
+        headers={"Content-Type": "application/json"},
+        data=context.text)