diff --git a/docs/source/index.rst b/docs/source/index.rst
index 2f46f2e5..5b151a40 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -37,4 +37,5 @@ Contents
    configuring-slack-for-spidermon
    configuring-telegram-for-spidermon
    actions
+   mixins
    changelog
diff --git a/docs/source/mixins.rst b/docs/source/mixins.rst
new file mode 100644
index 00000000..9081535f
--- /dev/null
+++ b/docs/source/mixins.rst
@@ -0,0 +1,36 @@
+.. _mixins:
+
+======
+Mixins
+======
+
+What is a Mixin?
+----------------
+
+A mixin is a class that implements one or more features that you can apply to
+any class through multiple inheritance. For more information, see `What is a
+mixin, and why are they useful?`_
+
+.. _What is a mixin, and why are they useful?: https://stackoverflow.com/q/533631
+
+Spidermon offers the following built-in mixins:
+
+- `JobMonitorMixin`_
+- `SpiderMonitorMixin`_
+- `StatsMonitorMixin`_
+- `ValidationMonitorMixin`_.
+
+Spidermon built-in mixins
+-------------------------
+
+.. automodule:: spidermon.contrib.monitors.mixins.job
+    :members: JobMonitorMixin
+
+.. automodule:: spidermon.contrib.monitors.mixins.spider
+    :members: SpiderMonitorMixin
+
+.. automodule:: spidermon.contrib.monitors.mixins.stats
+    :members: StatsMonitorMixin
+
+.. automodule:: spidermon.contrib.monitors.mixins.validation
+    :members: ValidationMonitorMixin
diff --git a/docs/source/monitors.rst b/docs/source/monitors.rst
index 901f59ea..fb23c525 100644
--- a/docs/source/monitors.rst
+++ b/docs/source/monitors.rst
@@ -47,6 +47,77 @@ implement your monitors:
 
 .. autoclass:: spidermon.core.monitors.Monitor
 
+Available monitor mixins
+------------------------
+
+.. class:: spidermon.contrib.mixins.StatsMonitorMixin
+
+    ``stats`` property from attribute from ``data``
+
+.. class:: spidermon.contrib.mixins.JobMonitorMixin
+
+    ``job`` property from attribute from ``data``
+
+.. class:: spidermon.contrib.mixins.SpiderMonitorMixin
+
+    Wraps ``StatsMonitorMixin`` and ``JobMonitorMixin`` and provides more
+    information about ``responses``.
+
+    ``responses`` an instance of ``ResponsesInfo``, provides information about
+    status codes
+
+.. class:: spidermon.contrib.monitors.spider.ResponsesInfo
+
+    Utility class used for accessing information about status codes compared
+    to the total number of responses.
+
+    ``count`` the total number of responses, equivalent to
+    ``downloader/response_count``` from stats
+
+    The following attributes are instances of
+    ``spidermon.contrib.stats.counters.DictPercentCounter``:
+
+        ``all`` percentages about all status codes
+
+        ``informational`` percentages about 1xx codes
+
+        ``succesful`` percentages about 2xx codes
+
+        ``redirections`` percentages about 3xx codes
+
+        ``bad_requests`` percentages about 4xx codes
+
+        ``internal_server_errors`` percentages about 5xx codes
+
+        ``others`` percentages about other codes
+
+        ``errors`` percentages about 4xx + 5xx status codes
+
+.. class:: spidermon.contrib.stats.counters.PercentCounter
+
+    Utility class for computing percentage from a total value.
+
+    ``count`` the current value used for computing the percentage
+
+    ``percent`` percentage of ``count`` from the total value
+
+    .. method:: inc_value(value)
+
+      increase the ``count`` by a given value
+
+.. class:: spidermon.contrib.stats.counters.DictPercentCounter
+
+    Dictionary wrapper initiated with a total and in which values are
+    ``PercentCounter`` instances with that total
+
+    ``count`` - sum of all values, this represents the total percentage of
+    requests from given total
+
+    .. method:: add_value(value)
+
+      create or add to an existing key a value
+
+
 Monitor Suites
 --------------