diff --git a/lib/Requests/Calendar/CalendarSet.php b/lib/Requests/Calendar/CalendarSet.php
index b50de47..d9368fa 100644
--- a/lib/Requests/Calendar/CalendarSet.php
+++ b/lib/Requests/Calendar/CalendarSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Calendar;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<CalendarParameters>
@@ -46,6 +47,18 @@ public function update(string $id, mixed $object = null): CalendarParameters
         return parent::update($id, $object);
     }
 
+    /**
+     * Patch a calendar
+     *
+     * @param string $id Calendar identifier
+     * @param CalendarParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     /**
      * Delete a calendar
      *
diff --git a/lib/Requests/Calendar/EventSet.php b/lib/Requests/Calendar/EventSet.php
index 159fe15..ce170f9 100644
--- a/lib/Requests/Calendar/EventSet.php
+++ b/lib/Requests/Calendar/EventSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Calendar;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<EventParameters>
@@ -46,6 +47,18 @@ public function update(string $id, mixed $object = null): EventParameters
         return parent::update($id, $object);
     }
 
+    /**
+     * Patch an event
+     *
+     * @param string $id Event identifier
+     * @param EventParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     /**
      * Delete an event
      *
diff --git a/lib/Requests/Contacts/AddressBookSet.php b/lib/Requests/Contacts/AddressBookSet.php
index 83af7ca..32e6fcc 100644
--- a/lib/Requests/Contacts/AddressBookSet.php
+++ b/lib/Requests/Contacts/AddressBookSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Contacts;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<AddressBookParameters>
@@ -46,6 +47,18 @@ public function update(string $id, mixed $object = null): AddressBookParameters
         return parent::update($id, $object);
     }
 
+    /**
+     * Patch an address book
+     *
+     * @param string $id Address book identifier
+     * @param AddressBookParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     /**
      * Delete an address book
      *
diff --git a/lib/Requests/Contacts/ContactSet.php b/lib/Requests/Contacts/ContactSet.php
index fe2d9b0..6b48da9 100644
--- a/lib/Requests/Contacts/ContactSet.php
+++ b/lib/Requests/Contacts/ContactSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Contacts;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<ContactParameters>
@@ -46,6 +47,18 @@ public function update(string $id, mixed $object = null): ContactParameters
         return parent::update($id, $object);
     }
 
+    /**
+     * Patch a contact
+     *
+     * @param string $id Contact identifier
+     * @param ContactParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     /**
      * Delete a contact
      *
diff --git a/lib/Requests/Files/NodeSet.php b/lib/Requests/Files/NodeSet.php
index 84ceab1..e06de18 100644
--- a/lib/Requests/Files/NodeSet.php
+++ b/lib/Requests/Files/NodeSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Files;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<NodeParameters>
@@ -35,6 +36,18 @@ public function delete(string $id): static
         return parent::delete($id);
     }
 
+    /**
+     * Patch a node
+     *
+     * @param string $id Node identifier
+     * @param NodeParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     public function destroyChildren(bool $value): static
     {
         $this->_command['onDestroyRemoveChildren'] = $value;
diff --git a/lib/Requests/Interfaces/RequestParametersInterface.php b/lib/Requests/Interfaces/RequestParametersInterface.php
index 8bd7902..28bdd4a 100644
--- a/lib/Requests/Interfaces/RequestParametersInterface.php
+++ b/lib/Requests/Interfaces/RequestParametersInterface.php
@@ -24,4 +24,11 @@ interface RequestParametersInterface
      * @return self For method chaining
      */
     public function bind(&$anchor): static;
+
+    /**
+     * Create a patch snapshot from the current structured parameters
+     *
+     * @return RequestPatchInterface The patch representation of these parameters
+     */
+    public function patch(): RequestPatchInterface;
 }
diff --git a/lib/Requests/Interfaces/RequestPatchInterface.php b/lib/Requests/Interfaces/RequestPatchInterface.php
new file mode 100644
index 0000000..2ff0da5
--- /dev/null
+++ b/lib/Requests/Interfaces/RequestPatchInterface.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Sebastian Krupinski <krupinski01@gmail.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace JmapClient\Requests\Interfaces;
+
+/**
+ * Interface for JMAP patch request parameters
+ */
+interface RequestPatchInterface
+{
+    /**
+     * Bind the patch to an anchor object
+     *
+     * @param object $anchor Reference to the anchor object
+     * @return self For method chaining
+     */
+    public function bind(&$anchor): static;
+
+    /**
+     * Set a JMAP patch path to a value
+     *
+     * @param string $path The JMAP patch path
+     * @param mixed $value The value for the path
+     *
+     * @return self For method chaining
+     */
+    public function path(string $path, mixed $value): static;
+
+    /**
+     * Replace the patch object with raw patch data
+     *
+     * @param array<mixed> $value Patch data keyed by JMAP patch path
+     *
+     * @return self For method chaining
+     */
+    public function parametersRaw(array $value): static;
+}
\ No newline at end of file
diff --git a/lib/Requests/Mail/MailIdentitySet.php b/lib/Requests/Mail/MailIdentitySet.php
index 1076d18..49d5204 100644
--- a/lib/Requests/Mail/MailIdentitySet.php
+++ b/lib/Requests/Mail/MailIdentitySet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Mail;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<MailIdentityParameters>
@@ -44,6 +45,18 @@ public function update(string $id, mixed $object = null): MailIdentityParameters
         return parent::update($id, $object);
     }
 
+    /**
+     * Patch an mail identity
+     *
+     * @param string $id Mail identity identifier
+     * @param MailIdentityParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     /**
      * Delete a mail identity
      *
diff --git a/lib/Requests/Mail/MailSet.php b/lib/Requests/Mail/MailSet.php
index 61df445..88c0102 100644
--- a/lib/Requests/Mail/MailSet.php
+++ b/lib/Requests/Mail/MailSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Mail;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<MailParameters>
@@ -44,6 +45,18 @@ public function update(string $id, mixed $object = null): MailParameters
         return parent::update($id, $object);
     }
 
+    /**
+     * Patch an email
+     *
+     * @param string $id Email identifier
+     * @param MailParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     /**
      * Delete an email
      *
diff --git a/lib/Requests/Mail/MailVacationSet.php b/lib/Requests/Mail/MailVacationSet.php
index 642fab6..3f00afb 100644
--- a/lib/Requests/Mail/MailVacationSet.php
+++ b/lib/Requests/Mail/MailVacationSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Mail;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<MailVacationParameters>
@@ -32,4 +33,16 @@ public function update(string $id, mixed $object = null): MailVacationParameters
     {
         return parent::update($id, $object);
     }
+
+    /**
+     * Patch an vacation response (there's only one with id "singleton")
+     *
+     * @param string $id Vacation response identifier (should be "singleton")
+     * @param MailVacationParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
 }
diff --git a/lib/Requests/Mail/MailboxSet.php b/lib/Requests/Mail/MailboxSet.php
index 3f297a6..83d6c7d 100644
--- a/lib/Requests/Mail/MailboxSet.php
+++ b/lib/Requests/Mail/MailboxSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Mail;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<MailboxParameters>
@@ -45,6 +46,18 @@ public function update(string $id, mixed $object = null): MailboxParameters
     {
         return parent::update($id, $object);
     }
+    
+    /**
+     * Patch a mailbox
+     *
+     * @param string $id Mailbox identifier
+     * @param MailboxParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
 
     /**
      * Delete a mailbox
diff --git a/lib/Requests/RequestParameters.php b/lib/Requests/RequestParameters.php
index 20f1872..1aebc7b 100644
--- a/lib/Requests/RequestParameters.php
+++ b/lib/Requests/RequestParameters.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests;
 
 use JmapClient\Requests\Interfaces\RequestParametersInterface;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 use stdClass;
 
 class RequestParameters implements RequestParametersInterface
@@ -34,6 +35,50 @@ public function bind(&$anchor): static
         return $this;
     }
 
+    public function patch(): RequestPatchInterface
+    {
+        $flatten = function (object|array $parameters, string $prefix = '') use (&$flatten): array {
+            $patch = [];
+
+            $entries = is_object($parameters) ? get_object_vars($parameters) : $parameters;
+
+            foreach ($entries as $name => $value) {
+                $path = $prefix === '' ? self::escapePatchSegment($name) : $prefix . '/' . self::escapePatchSegment($name);
+
+                if (is_object($value)) {
+                    $entries = $flatten($value, $path);
+                    if ($entries === []) {
+                        $patch[$path] = new stdClass();
+                        continue;
+                    }
+
+                    $patch = array_merge($patch, $entries);
+                    continue;
+                }
+
+                if (is_array($value) && array_is_list($value) === false) {
+                    $entries = $flatten($value, $path);
+                    if ($entries === []) {
+                        $patch[$path] = new stdClass();
+                        continue;
+                    }
+
+                    $patch = array_merge($patch, $entries);
+                    continue;
+                }
+
+                $patch[$path] = $value;
+            }
+
+            return $patch;
+        };
+
+        $patch = new RequestPatch();
+        $patch->parametersRaw($flatten($this->_parameters));
+
+        return $patch;
+    }
+
     protected function parameter(string $name, mixed $value): static
     {
         $this->_parameters->$name = $value;
@@ -65,4 +110,9 @@ public function parametersRaw(array $value): static
         $this->_parameters = (object) $value;
         return $this;
     }
+
+    private static function escapePatchSegment(string $segment): string
+    {
+        return str_replace(['~', '/'], ['~0', '~1'], $segment);
+    }
 }
diff --git a/lib/Requests/RequestPatch.php b/lib/Requests/RequestPatch.php
new file mode 100644
index 0000000..069ee5a
--- /dev/null
+++ b/lib/Requests/RequestPatch.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Sebastian Krupinski <krupinski01@gmail.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace JmapClient\Requests;
+
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
+use stdClass;
+
+class RequestPatch implements RequestPatchInterface
+{
+    protected object $_parameters;
+
+    public function __construct(&$parameters = null)
+    {
+        if ($parameters === null) {
+            $this->_parameters = new stdClass();
+        } else {
+            $this->_parameters = & $parameters;
+        }
+    }
+
+    public function bind(&$anchor): static
+    {
+        $anchor = $this->_parameters;
+        return $this;
+    }
+
+    public function path(string $path, mixed $value): static
+    {
+        $this->_parameters->$path = $value;
+        return $this;
+    }
+
+    public function parametersRaw(array $value): static
+    {
+        $this->_parameters = (object) $value;
+        return $this;
+    }
+}
\ No newline at end of file
diff --git a/lib/Requests/RequestSet.php b/lib/Requests/RequestSet.php
index 9c4246b..5469cf3 100644
--- a/lib/Requests/RequestSet.php
+++ b/lib/Requests/RequestSet.php
@@ -11,6 +11,7 @@
 
 use JmapClient\Exceptions\InvalidParameterTypeException;
 use JmapClient\Requests\Interfaces\RequestParametersInterface;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 use JmapClient\Requests\Interfaces\RequestSetInterface;
 
 /**
@@ -19,8 +20,12 @@
  */
 class RequestSet extends Request implements RequestSetInterface
 {
+    private const UPDATE_MODE_STRUCTURED = 'structured';
+    private const UPDATE_MODE_PATCH = 'patch';
+
     protected string $_method = 'set';
     protected string $_parametersClass = RequestParameters::class;
+    protected array $_updateModes = [];
 
     public function state(string $state): static
     {
@@ -59,7 +64,7 @@ public function create(string $id, mixed $object = null): RequestParametersInter
     }
 
     /**
-     * Update an existing object
+     * Update an existing object(s)
      *
      * @param string $id Object identifier
      * @param TParameters|null $object Optional parameters object
@@ -68,6 +73,11 @@ public function create(string $id, mixed $object = null): RequestParametersInter
      */
     protected function update(string $id, RequestParametersInterface|null $object = null): RequestParametersInterface
     {
+        if (isset($this->_updateModes[$id]) && $this->_updateModes[$id] !== self::UPDATE_MODE_STRUCTURED) {
+            throw new \LogicException("Update \"$id\" is a patch object and must be accessed via patch() method");
+        }
+        $this->_updateModes[$id] = self::UPDATE_MODE_STRUCTURED;
+
         // get the class to use (override or default)
         $class = RequestClasses::getParameter($this->_class . '.object') ?? $this->_parametersClass;
 
@@ -88,6 +98,40 @@ protected function update(string $id, RequestParametersInterface|null $object =
         return $instance;
     }
 
+    /**
+     * Update an existing object(s) with a patch
+     *
+     * @param string $id Object identifier
+     * @param RequestParametersInterface|RequestPatchInterface|null $object Optional structured or patch object
+     *
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    protected function patch(string $id, RequestParametersInterface|RequestPatchInterface|null $object = null): RequestPatchInterface
+    {
+        if (isset($this->_updateModes[$id]) && $this->_updateModes[$id] !== self::UPDATE_MODE_PATCH) {
+            throw new \LogicException("Update \"$id\" is a structured object and must be accessed via update() method");
+        }
+        $this->_updateModes[$id] = self::UPDATE_MODE_PATCH;
+
+        // get the class to use (override or default)
+        $class = RequestClasses::getParameter($this->_class . '.object') ?? $this->_parametersClass;
+
+        // validate object type if provided
+        if ($object !== null && !($object instanceof $class) && !($object instanceof RequestPatchInterface)) {
+            throw new InvalidParameterTypeException($class . '|' . RequestPatchInterface::class, $object, 'object');
+        }
+
+        if (!isset($this->_command['update'][$id]) && $object === null) {
+            $this->_command['update'][$id] = new \stdClass();
+        } elseif ($object instanceof RequestPatchInterface) {
+            $object->bind($this->_command['update'][$id]);
+        } elseif ($object instanceof RequestParametersInterface) {
+            $object->patch()->bind($this->_command['update'][$id]);
+        }
+
+        return new RequestPatch($this->_command['update'][$id]);
+    }
+
     /**
      * Delete an existing object
      *
@@ -100,4 +144,18 @@ protected function delete(string $id): static
         $this->_command['destroy'][] = $id;
         return $this;
     }
+
+    private function assertUpdateMode(string $id, string $mode): void
+    {
+        if (!isset($this->_updateModes[$id]) || $this->_updateModes[$id] === $mode) {
+            return;
+        }
+
+        throw new \LogicException(sprintf(
+            'Update "%s" is already bound in %s mode and cannot be rebound in %s mode',
+            $id,
+            $this->_updateModes[$id],
+            $mode
+        ));
+    }
 }
diff --git a/lib/Requests/Tasks/TaskListSet.php b/lib/Requests/Tasks/TaskListSet.php
index 53f0e05..8e47553 100644
--- a/lib/Requests/Tasks/TaskListSet.php
+++ b/lib/Requests/Tasks/TaskListSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Tasks;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<TaskListParameters>
@@ -46,6 +47,18 @@ public function update(string $id, mixed $object = null): TaskListParameters
         return parent::update($id, $object);
     }
 
+    /**
+     * Patch a task list
+     *
+     * @param string $id Task list identifier
+     * @param TaskListParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     /**
      * Delete a task list
      *
diff --git a/lib/Requests/Tasks/TaskSet.php b/lib/Requests/Tasks/TaskSet.php
index eacc623..80d70c0 100644
--- a/lib/Requests/Tasks/TaskSet.php
+++ b/lib/Requests/Tasks/TaskSet.php
@@ -10,6 +10,7 @@
 namespace JmapClient\Requests\Tasks;
 
 use JmapClient\Requests\RequestSet;
+use JmapClient\Requests\Interfaces\RequestPatchInterface;
 
 /**
  * @extends RequestSet<TaskParameters>
@@ -46,6 +47,18 @@ public function update(string $id, mixed $object = null): TaskParameters
         return parent::update($id, $object);
     }
 
+    /**
+     * Patch an task
+     *
+     * @param string $id Task identifier
+     * @param TaskParameters|RequestPatchInterface|null $object Optional structured or patch object
+     * @return RequestPatchInterface The patch object for method chaining
+     */
+    public function patch(string $id, mixed $object = null): RequestPatchInterface
+    {
+        return parent::patch($id, $object);
+    }
+
     /**
      * Delete a task
      *