diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs
index 7d3e3f63..9c6a1f60 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs
@@ -118,6 +118,12 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     request.Headers.Add("X-API-Key", settings.ApplicationKey);
                 }
 
+                // Etsy requires sending the client identifier 'client_id' gotten from Authorization Code exchange aka x-api-key in the Headers (AttachAccessTokenParameter sets Authorization Bearer header already by default).
+                else if (context.Registration.ProviderType is ProviderTypes.Etsy)
+                {
+                    request.Headers.Add("x-api-key", context.Registration.ClientId);
+                }
+
                 // Notion requires sending an explicit API version (which is statically set
                 // to the last version known to be supported by the OpenIddict integration).
                 else if (context.Registration.ProviderType is ProviderTypes.Notion)
diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs
index c1f6c4a6..8870917e 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs
@@ -1044,6 +1044,13 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                         left : new Uri("https://api.dailymotion.com/user", UriKind.Absolute),
                         right: new Uri(identifier, UriKind.Relative)),
 
+                // Etsy's userinfo endpoint requires sending the user identifier in the URI path, which can be gotten from one of the tokens returned by the Token endpoint.
+                ProviderTypes.Etsy when (string?) context.TokenResponse?["access_token"] is string accessToken
+                                        && accessToken.Split(['.'],3).First() is string userId // TODO: Check if string type is correct because Etsy Reference states <int64> for this as Path Parameter https://developers.etsy.com/documentation/reference#operation/getUser
+                    => OpenIddictHelpers.CreateAbsoluteUri(
+                        left : new Uri("https://openapi.etsy.com/v3/application/users/", UriKind.Absolute),
+                        right: new Uri(userId, UriKind.Relative)),
+
                 // HubSpot doesn't have a static userinfo endpoint but allows retrieving basic information
                 // by using an access token info endpoint that requires sending the token in the URI path.
                 ProviderTypes.HubSpot when
@@ -1401,6 +1408,9 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     ?.Select(parameter => (string?) parameter["email"])
                     ?.FirstOrDefault(),
 
+                // Etsy returns the email address as a custom "primary_email" node:
+                ProviderTypes.Etsy => (string?) context.UserInfoResponse?["primary_email"],
+
                 // HubSpot returns the email address as a custom "user" node:
                 ProviderTypes.HubSpot => (string?) context.UserInfoResponse?["user"],
 
@@ -1436,7 +1446,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     => (string?) context.UserInfoResponse?["username"],
 
                 // These providers don't return a username so one is created using the "first_name" and "last_name" nodes:
-                ProviderTypes.Basecamp or ProviderTypes.Harvest or ProviderTypes.VkId
+                ProviderTypes.Basecamp or ProviderTypes.Etsy or ProviderTypes.Harvest or ProviderTypes.VkId
                     when context.UserInfoResponse?.HasParameter("first_name") is true &&
                          context.UserInfoResponse?.HasParameter("last_name")  is true
                     => $"{(string?) context.UserInfoResponse?["first_name"]} {(string?) context.UserInfoResponse?["last_name"]}",
@@ -1514,9 +1524,10 @@ public static partial class OpenIddictClientWebIntegrationHandlers
             context.MergedPrincipal.SetClaim(ClaimTypes.NameIdentifier, issuer: issuer, value: context.Registration.ProviderType switch
             {
                 // These providers return the user identifier as a custom "user_id" node:
-                ProviderTypes.Amazon        or ProviderTypes.HubSpot or
-                ProviderTypes.StackExchange or ProviderTypes.Typeform or
-                ProviderTypes.VkId
+                ProviderTypes.Amazon        or   ProviderTypes.Etsy or
+                ProviderTypes.HubSpot       or   ProviderTypes.StackExchange or
+                ProviderTypes.Typeform      or   ProviderTypes.VkId
+                
                     => (string?) context.UserInfoResponse?["user_id"],
 
                 // ArcGIS and Trakt don't return a user identifier and require using the username as the identifier:
diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
index c2ae4645..f046a117 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
@@ -766,6 +766,44 @@
   </Provider>
 
   <!--
+                                                      ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
+                                                      ██ ▄▄▄█▄ ▄█ ▄▄█ ██ 
+                                                      ██ ▄▄▄██ ██▄▄▀█ ▀▀ 
+                                                      ██ ▀▀▀██▄██▄▄▄█▀▀▀▄
+                                                      ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+  -->
+  <Provider Name="Etsy" Id="d9f3c1a2-4b7e-4c9d-8a2f-3b7e5c1d9a6f"
+            Documentation="https://developers.etsy.com/documentation/essentials/authentication">
+    <Environment Issuer="https://www.etsy.com/">
+      
+      <Configuration AuthorizationEndpoint="https://www.etsy.com/oauth/connect"
+                     TokenEndpoint="https://openapi.etsy.com/v3/public/oauth/token">
+                     
+        <!--
+        The getMe Endpoint https://developers.etsy.com/documentation/reference#operation/getMe does only provide the 'user_id' and 'shop_id' parameters,
+        but the UserInfo Endpoint Response is expected to contain user information like 'nameidentifier', 'email', 'given_name, 'family_name', etc.
+        To get those additional user information, the getUser Endpoint must be called and got's overridden in 'OpenIdDictClient.WebIntegration.AuthenticationHandlers.OverrideUserInfoEndpoint'
+        -->
+
+        <CodeChallengeMethod Value="S256" />
+
+        <!--Etsy API requires Authorization Code flow + Refresh Token to work!-->
+        <GrantType Value="authorization_code" />
+        <GrantType Value="refresh_token" />
+
+      </Configuration>
+      <!--
+      Required for getMe Endpoint, but as this doesn't provide any user information, which we are not already able to extract from 'access_token' ('user_id'),
+      except from the 'shop_id', we are using getUser Endpoint instead for UserInformation
+      -->
+      <Scope Name="shops_r"       Default="true" Required="false" />
+      <!--Email scope is required for UserInfoEndpoint equivalent getUser Endpoint and not only the getMe endpoint as mentioned above-->
+      <Scope Name="email_r"       Default="true" Required="true" />
+    </Environment>
+  </Provider>
+
+
+    <!--
                                     ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
                                     ██ ▄▄▄█ ██ █ ▄▄▄████ ▄▄▄ ██ ▀██ ██ ████▄ ▄██ ▀██ ██ ▄▄▄██
                                     ██ ▄▄▄█ ██ █ ▄▄▄████ ███ ██ █ █ ██ █████ ███ █ █ ██ ▄▄▄██