diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs
index 1b984cee..f599a7b2 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs
@@ -393,6 +393,10 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                         ["accounts"] = context.Response["accounts"]
                     },
 
+                    // Calendly returns a nested "resource" object.
+                    ProviderTypes.Calendly => new(context.Response["resource"]?.GetNamedParameters() ??
+                        throw new InvalidOperationException(SR.FormatID0334("resource"))),
+
                     // Disqus returns a nested "response" object.
                     ProviderTypes.Disqus => new(context.Response["response"]?.GetNamedParameters() ??
                         throw new InvalidOperationException(SR.FormatID0334("response"))),
diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs
index df2b2cc1..b8baa579 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs
@@ -1310,6 +1310,9 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 // Bitly returns the user identifier as a custom "login" node:
                 ProviderTypes.Bitly => (string?) context.UserinfoResponse?["login"],
 
+                // Calendly returns the user identifier (formatted as a URI) as a custom "uri" node:
+                ProviderTypes.Calendly => (string?) context.UserinfoResponse?["uri"],
+
                 // DeviantArt returns the user identifier as a custom "userid" node:
                 ProviderTypes.DeviantArt => (string?) context.UserinfoResponse?["userid"],
 
diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
index 079cfd61..ca0d1a57 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
@@ -339,6 +339,30 @@
     </Environment>
   </Provider>
 
+  <!--
+                                        ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
+                                        ██ ▄▄▀█ ▄▄▀██ █████ ▄▄▄██ ▀██ ██ ▄▄▀██ █████ ███ ██
+                                        ██ ████ ▀▀ ██ █████ ▄▄▄██ █ █ ██ ██ ██ █████▄▀▀▀▄██
+                                        ██ ▀▀▄█ ██ ██ ▀▀ ██ ▀▀▀██ ██▄ ██ ▀▀ ██ ▀▀ ████ ████
+                                        ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+  -->
+
+  <Provider Name="Calendly" Id="8cc37743-2939-4562-b029-05eaef4724c0"
+            Documentation="https://developer.calendly.com/api-docs/b3A6NTkxNDA5-get-authorization-code">
+    <Environment Issuer="https://calendly.com/">
+      <Configuration AuthorizationEndpoint="https://auth.calendly.com/oauth/authorize"
+                     IntrospectionEndpoint="https://auth.calendly.com/oauth/introspect"
+                     RevocationEndpoint="https://auth.calendly.com/oauth/revoke"
+                     TokenEndpoint="https://auth.calendly.com/oauth/token"
+                     UserinfoEndpoint="https://api.calendly.com/users/me">
+        <CodeChallengeMethod Value="S256" />
+
+        <GrantType Value="authorization_code" />
+        <GrantType Value="refresh_token" />
+      </Configuration>
+    </Environment>
+  </Provider>
+
   <!--
                                       ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
                                       ██ ▄▄▀██ █████ ▄▄▀██ ▄▄▄ ██ ▄▄▄ ██ ████▄ ▄█ ▀██ ██ █▀▄██