diff --git a/src/Agent/AgentServiceConnectProxyConfig.php b/src/Agent/AgentServiceConnectProxyConfig.php
index a9996b8..f0edb36 100644
--- a/src/Agent/AgentServiceConnectProxyConfig.php
+++ b/src/Agent/AgentServiceConnectProxyConfig.php
@@ -31,6 +31,12 @@
 class AgentServiceConnectProxyConfig extends AbstractModel
 {
     protected const FIELDS = [
+        self::FIELD_ENVOY_EXTENSIONS => [
+            Transcoding::FIELD_CLASS => EnvoyExtension::class,
+            Transcoding::FIELD_TYPE => Transcoding::ARRAY,
+            Transcoding::FIELD_ARRAY_TYPE => Transcoding::OBJECT,
+            Transcoding::FIELD_OMITEMPTY => true,
+        ],
         self::FIELD_DESTINATION_SERVICE_NAME => Transcoding::OMITEMPTY_STRING_FIELD,
         self::FIELD_DESTINATION_SERVICE_ID   => Transcoding::OMITEMPTY_STRING_FIELD,
         self::FIELD_LOCAL_SERVICE_ADDRESS    => Transcoding::OMITEMPTY_STRING_FIELD,
@@ -57,6 +63,7 @@ class AgentServiceConnectProxyConfig extends AbstractModel
         ],
     ];
 
+    private const FIELD_ENVOY_EXTENSIONS = 'EnvoyExtension';
     private const FIELD_DESTINATION_SERVICE_NAME = 'DestinationServiceName';
     private const FIELD_DESTINATION_SERVICE_ID   = 'DestinationServiceID';
     private const FIELD_LOCAL_SERVICE_ADDRESS    = 'LocalServiceAddress';
@@ -66,6 +73,8 @@ class AgentServiceConnectProxyConfig extends AbstractModel
     private const FIELD_MESH_GATEWAY             = 'MeshGateway';
     private const FIELD_EXPOSE                   = 'Expose';
 
+    /** @var \DCarbone\PHPConsulAPI\Agent\EnvoyExtension[] */
+    public array $EnvoyExtensions = [];
     /** @var string */
     public string $DestinationServiceName = '';
     /** @var string */
@@ -74,6 +83,12 @@ class AgentServiceConnectProxyConfig extends AbstractModel
     public string $LocalServiceAddress = '';
     /** @var int */
     public int $LocalServicePort = 0;
+    /** @var string */
+    public string $LocalServiceSocketPath = '';
+    /** @var string */
+    public string $Mode = '';
+    /** @var \DCarbone\PHPConsulAPI\Agent\TransparentProxyConfig|null */
+    public ?TransparentProxyConfig $TransparentProxy = null;
     /** @var \DCarbone\PHPConsulAPI\Agent\Upstream[] */
     public array $Upstreams = [];
     /** @var \DCarbone\PHPConsulAPI\ConfigEntry\MeshGatewayConfig */
@@ -96,6 +111,34 @@ public function __construct(?array $data = [])
         }
     }
 
+    /**
+     * @return array
+     */
+    public function getEnvoyExtensions(): array
+    {
+        return $this->EnvoyExtensions;
+    }
+
+    /**
+     * @param EnvoyExtension $envoyExtension
+     * @return \DCarbone\PHPConsulAPI\Agent\AgentServiceConnectProxyConfig
+     */
+    public function addEnvoyExtension(EnvoyExtension $envoyExtension): self
+    {
+        $this->EnvoyExtensions[] = $envoyExtension;
+        return $this;
+    }
+
+    /**
+     * @param array $EnvoyExtensions
+     * @return \DCarbone\PHPConsulAPI\Agent\AgentServiceConnectProxyConfig
+     */
+    public function setEnvoyExtensions(array $EnvoyExtensions): self
+    {
+        $this->EnvoyExtensions = $EnvoyExtensions;
+        return $this;
+    }
+
     /**
      * @return string
      */
@@ -168,6 +211,60 @@ public function setLocalServicePort(int $LocalServicePort): self
         return $this;
     }
 
+    /**
+     * @return string
+     */
+    public function getLocalServiceSocketPath(): string
+    {
+        return $this->LocalServiceSocketPath;
+    }
+
+    /**
+     * @param string $LocalServiceSocketPath
+     * @return AgentServiceConnectProxyConfig
+     */
+    public function setLocalServiceSocketPath(string $LocalServiceSocketPath): self
+    {
+        $this->LocalServiceSocketPath = $LocalServiceSocketPath;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getMode(): string
+    {
+        return $this->Mode;
+    }
+
+    /**
+     * @param string $Mode
+     * @return AgentServiceConnectProxyConfig
+     */
+    public function setMode(string $Mode): self
+    {
+        $this->Mode = $Mode;
+        return $this;
+    }
+
+    /**
+     * @return \DCarbone\PHPConsulAPI\Agent\TransparentProxyConfig|null
+     */
+    public function getTransparentProxy(): ?TransparentProxyConfig
+    {
+        return $this->TransparentProxy;
+    }
+
+    /**
+     * @param \DCarbone\PHPConsulAPI\Agent\TransparentProxyConfig|null $TransparentProxy
+     * @return AgentServiceConnectProxyConfig
+     */
+    public function setTransparentProxy(?TransparentProxyConfig $TransparentProxy): self
+    {
+        $this->TransparentProxy = $TransparentProxy;
+        return $this;
+    }
+
     /**
      * @return \DCarbone\PHPConsulAPI\Agent\Upstream[]
      */
diff --git a/src/Agent/EnvoyExtension.php b/src/Agent/EnvoyExtension.php
new file mode 100644
index 0000000..4df7d45
--- /dev/null
+++ b/src/Agent/EnvoyExtension.php
@@ -0,0 +1,135 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DCarbone\PHPConsulAPI\Agent;
+
+/*
+   Copyright 2023 Daniel Carbone (daniel.p.carbone@gmail.com)
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
+
+use DCarbone\PHPConsulAPI\AbstractModel;
+use DCarbone\PHPConsulAPI\FakeMap;
+use DCarbone\PHPConsulAPI\Transcoding;
+
+class EnvoyExtension extends AbstractModel
+{
+    protected const FIELDS = [
+        self::FIELD_ARGUMENTS => Transcoding::MAP_FIELD,
+    ];
+
+    private const FIELD_ARGUMENTS = 'Arguments';
+
+    /** @var string */
+    public string $Name = '';
+    /** @var bool */
+    public bool $Required = false;
+    /** @var \DCarbone\PHPConsulAPI\FakeMap|null */
+    public ?FakeMap $Arguments = null;
+    /** @var string */
+    public string $ConsulVersion = '';
+    /** @var string */
+    public string $EnvoyVersion = '';
+
+    /**
+     * @return string
+     */
+    public function getName(): string
+    {
+        return $this->Name;
+    }
+
+    /**
+     * @param string $Name
+     * @return EnvoyExtension
+     */
+    public function setName(string $Name): EnvoyExtension
+    {
+        $this->Name = $Name;
+        return $this;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isRequired(): bool
+    {
+        return $this->Required;
+    }
+
+    /**
+     * @param bool $Required
+     * @return EnvoyExtension
+     */
+    public function setRequired(bool $Required): EnvoyExtension
+    {
+        $this->Required = $Required;
+        return $this;
+    }
+
+    /**
+     * @return \DCarbone\PHPConsulAPI\FakeMap|null
+     */
+    public function getArguments(): ?FakeMap
+    {
+        return $this->Arguments;
+    }
+
+    /**
+     * @param \DCarbone\PHPConsulAPI\FakeMap|null $Arguments
+     * @return EnvoyExtension
+     */
+    public function setArguments(?FakeMap $Arguments): EnvoyExtension
+    {
+        $this->Arguments = $Arguments;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getConsulVersion(): string
+    {
+        return $this->ConsulVersion;
+    }
+
+    /**
+     * @param string $ConsulVersion
+     * @return EnvoyExtension
+     */
+    public function setConsulVersion(string $ConsulVersion): EnvoyExtension
+    {
+        $this->ConsulVersion = $ConsulVersion;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getEnvoyVersion(): string
+    {
+        return $this->EnvoyVersion;
+    }
+
+    /**
+     * @param string $EnvoyVersion
+     * @return EnvoyExtension
+     */
+    public function setEnvoyVersion(string $EnvoyVersion): EnvoyExtension
+    {
+        $this->EnvoyVersion = $EnvoyVersion;
+        return $this;
+    }
+}
diff --git a/src/Agent/TransparentProxyConfig.php b/src/Agent/TransparentProxyConfig.php
new file mode 100644
index 0000000..924f4d5
--- /dev/null
+++ b/src/Agent/TransparentProxyConfig.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DCarbone\PHPConsulAPI\Agent;
+
+/*
+   Copyright 2023 Daniel Carbone (daniel.p.carbone@gmail.com)
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
+
+use DCarbone\PHPConsulAPI\AbstractModel;
+
+class TransparentProxyConfig extends AbstractModel
+{
+    /** @var int  */
+    public int $OutboundListenerPort = 0;
+    /** @var bool  */
+    public bool $DialedDirectly = false;
+
+    /**
+     * @return int
+     */
+    public function getOutboundListenerPort(): int
+    {
+        return $this->OutboundListenerPort;
+    }
+
+    /**
+     * @param int $OutboundListenerPort
+     * @return TransparentProxyConfig
+     */
+    public function setOutboundListenerPort(int $OutboundListenerPort): TransparentProxyConfig
+    {
+        $this->OutboundListenerPort = $OutboundListenerPort;
+        return $this;
+    }
+}
diff --git a/src/Consul.php b/src/Consul.php
index d81b7b8..e352254 100644
--- a/src/Consul.php
+++ b/src/Consul.php
@@ -131,6 +131,10 @@ class Consul
     public const ACLModeLegacy   = '2';
     public const ACLModeUnknown  = '3';
 
+    public const ProxyModeDefault = '';
+    public const ProxyModeTransparent = 'transparent';
+    public const ProxyModeDirect = 'direct';
+
     // "private" constants
 
     public const _headerConsulPrefix             = 'X-Consul-';