diff --git a/source/api/actions/invite_create.ts b/source/api/actions/invite_create.ts
index f43f953..ac59873 100644
--- a/source/api/actions/invite_create.ts
+++ b/source/api/actions/invite_create.ts
@@ -24,16 +24,19 @@ namespace _espe.api
 	{
 		lib_plankton.rest_http.register<
 			{
-				membership_number_changeable : boolean;
-				membership_number_value : (null | string);
-				name_changeable : boolean;
-				name_value : string;
-				email_address_changeable : boolean;
-				email_address_value : (null | string);
-				groups_changeable : boolean;
-				groups_value : Array<string>;
-				expiry ?: (null | int);
-				// notification_target_url_template ?: (null | string);
+				data : {
+					membership_number_changeable : boolean;
+					membership_number_value : (null | string);
+					name_changeable : boolean;
+					name_value : string;
+					email_address_changeable : boolean;
+					email_address_value : (null | string);
+					groups_changeable : boolean;
+					groups_value : Array<string>;
+					expiry : (null | int);
+				};
+				notification_target_url_template ?: (null | string);
+				send_immediatly : boolean;
 			},
 			(
 				string
@@ -57,73 +60,87 @@ namespace _espe.api
 					"nullable": false,
 					"additionalProperties": false,
 					"properties": {
-						"membership_number_changeable": {
-							"type": "boolean",
+						"data": {
 							"nullable": false,
-							"description": "Mitgliedsnummer | änderbar"
-						},
-						"membership_number_value": {
-							"type": "string",
-							"nullable": true,
-							"description": "Mitgliedsnummer | Wert"
-						},
-						"name_changeable": {
-							"type": "boolean",
-							"nullable": false,
-							"description": "Name | änderbar"
-						},
-						"name_value": {
-							"type": "string",
-							"nullable": true,
-							"description": "Name | Wert"
-						},
-						"email_address_changeable": {
-							"type": "boolean",
-							"nullable": false,
-							"description": "E-Mail-Adresse | änderbar"
-						},
-						"email_address_value": {
-							"type": "string",
-							"nullable": true,
-							"description": "E-Mail-Adresse | Wert"
-						},
-						"groups_integer": {
-							"type": "integer",
-							"nullable": true,
-							"description": "Gruppen | Modus"
-						},
-						"groups_value": {
-							"nullable": false,
-							"type": "array",
-							"items": {
-								"type": "string",
-								"nullable": false,
+							"type": "object",
+							"additionalProperties": false,
+							"properties": {
+								"expiry": {
+									"nullable": true,
+									"type": "intiger",
+									"description": "Ablaufzeitpunkt"
+								},
+								"membership_number_changeable": {
+									"type": "boolean",
+									"nullable": false,
+									"description": "Mitgliedsnummer | änderbar"
+								},
+								"membership_number_value": {
+									"type": "string",
+									"nullable": true,
+									"description": "Mitgliedsnummer | Wert"
+								},
+								"name_changeable": {
+									"type": "boolean",
+									"nullable": false,
+									"description": "Name | änderbar"
+								},
+								"name_value": {
+									"type": "string",
+									"nullable": true,
+									"description": "Name | Wert"
+								},
+								"email_address_changeable": {
+									"type": "boolean",
+									"nullable": false,
+									"description": "E-Mail-Adresse | änderbar"
+								},
+								"email_address_value": {
+									"type": "string",
+									"nullable": true,
+									"description": "E-Mail-Adresse | Wert"
+								},
+								"groups_integer": {
+									"type": "integer",
+									"nullable": true,
+									"description": "Gruppen | Modus"
+								},
+								"groups_value": {
+									"nullable": false,
+									"type": "array",
+									"items": {
+										"type": "string",
+										"nullable": false,
+									},
+									"description": "Gruppen | Wert"
+								},
 							},
-							"description": "Gruppen | Wert"
+							"required": [
+								"membership_number_changeable",
+								"membership_number_value",
+								"name_changeable",
+								"name_value",
+								"email_address_changeable",
+								"email_address_value",
+								"groups_changeable",
+								"groups_value",
+								"expiry",
+							]
 						},
-						"expiry": {
-							"nullable": true,
-							"type": "intiger",
-							"description": "Ablaufzeitpunkt"
-						},
-						/*
 						"notification_target_url_template": {
 							"type": "string",
 							"nullable": true,
-							"description": "Platz-Halter: id"
+							"description": "Platz-Halter: key"
+						},
+						"send_immediatly": {
+							"nullable": false,
+							"type": "boolean",
+							"description": "Einladungs-Link direkt an angegebene E-Mail-Adresse versenden"
 						},
-						 */
 					},
 					"required": [
-						"membership_number_changeable",
-						"membership_number_value",
-						"name_changeable",
-						"name_value",
-						"email_address_changeable",
-						"email_address_value",
-						"groups_changeable",
-						"groups_value",
-						"expiry",
+						"data",
+						"send_immediatly",
 					]
 				}),
 				"output_schema": () => ({
@@ -155,9 +172,9 @@ namespace _espe.api
 							(! _espe.conf.get().settings.misc.facultative_membership_number)
 							&&
 							(
-								(input.membership_number_value === null)
+								(input.data.membership_number_value === null)
 								||
-								(input.membership_number_value === "")
+								(input.data.membership_number_value === "")
 							)
 						) {
 							return Promise.resolve({
@@ -168,17 +185,19 @@ namespace _espe.api
 						else {
 							const invite_info : {id : _espe.type.invite_id; key : _espe.type.invite_key;} = await _espe.service.invite.create(
 								{
-									"membership_number_changeable": input.membership_number_changeable,
-									"membership_number_value": input.membership_number_value,
-									"name_changeable": input.name_changeable,
-									"name_value": input.name_value,
-									"email_address_changeable": input.email_address_changeable,
-									"email_address_value": input.email_address_value,
-									"groups_changeable": input.groups_changeable,
-									"groups_value": input.groups_value,
+									"membership_number_changeable": input.data.membership_number_changeable,
+									"membership_number_value": input.data.membership_number_value,
+									"name_changeable": input.data.name_changeable,
+									"name_value": input.data.name_value,
+									"email_address_changeable": input.data.email_address_changeable,
+									"email_address_value": input.data.email_address_value,
+									"groups_changeable": input.data.groups_changeable,
+									"groups_value": input.data.groups_value,
 								},
 								{
-									"expiry": input.expiry,
+									"expiry": input.data.expiry,
+									"notification_target_url_template": input.notification_target_url_template,
+									"send_immediatly": input.send_immediatly,
 								}
 							);
 							return Promise.resolve({
diff --git a/source/api/actions/invite_read.ts b/source/api/actions/invite_read.ts
new file mode 100644
index 0000000..fa3ebe6
--- /dev/null
+++ b/source/api/actions/invite_read.ts
@@ -0,0 +1,160 @@
+/*
+Espe | Ein schlichtes Werkzeug zur Mitglieder-Verwaltung | Backend
+Copyright (C) 2024 Christian Fraß
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public 
+License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later 
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied 
+warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program. If not, see 
+<https://www.gnu.org/licenses/>. 
+ */
+
+namespace _espe.api
+{
+	
+	/**
+	 */
+	export function register_invite_read(
+		rest_subject : lib_plankton.rest_http.type_rest
+	) : void
+	{
+		lib_plankton.rest_http.register<
+			int,
+			(
+				string
+				|
+				{
+					key : string;
+					expiry : (null | int);
+					membership_number_changeable : boolean;
+					membership_number_value : (null | string);
+					name_changeable : boolean;
+					name_value : string;
+					email_address_changeable : boolean;
+					email_address_value : (null | string);
+					groups_changeable : boolean;
+					groups_value : Array<string>;
+				}
+			)
+		>(
+			rest_subject,
+			lib_plankton.http.enum_method.get,
+			_espe.api.full_path("/invite/read"),
+			{
+				/**
+				 * @todo translation
+				 */
+				"description": () => "gibt die Daten einer Einladung anhand ihrer ID aus",
+				"query_parameters": () => [
+					{
+						"name": "id",
+						"required": true,
+						"description": "id",
+					}
+				],
+				"output_schema": () => ({
+					"type": "object",
+					"nullable": false,
+					"additionalProperties": false,
+					"properties": {
+						"expiry": {
+							"nullable": true,
+							"type": "integer",
+							"description": "Ablaufzeitpunkt"
+						},
+						"membership_number_changeable": {
+							"type": "boolean",
+							"nullable": false,
+							"description": "Mitgliedsnummer | änderbar"
+						},
+						"membership_number_value": {
+							"type": "string",
+							"nullable": true,
+							"description": "Mitgliedsnummer | Wert"
+						},
+						"name_changeable": {
+							"type": "boolean",
+							"nullable": false,
+							"description": "Name | änderbar"
+						},
+						"name_value": {
+							"type": "string",
+							"nullable": true,
+							"description": "Name | Wert"
+						},
+						"email_address_changeable": {
+							"type": "boolean",
+							"nullable": false,
+							"description": "E-Mail-Adresse | änderbar"
+						},
+						"email_address_value": {
+							"type": "string",
+							"nullable": true,
+							"description": "E-Mail-Adresse | Wert"
+						},
+						"groups_changeable": {
+							"type": "boolean",
+							"nullable": false,
+							"description": "Gruppen | änderbar"
+						},
+						"groups_value": {
+							"nullable": false,
+							"type": "array",
+							"items": {
+								"type": "string",
+								"nullable": false,
+							},
+							"description": "Gruppen | Wert"
+						},
+					},
+					"required": [
+						"expiry",
+						"membership_number_mode",
+						"membership_number_value",
+						"name_mode",
+						"name_value",
+						"email_address_mode",
+						"email_address_value",
+						"groups_mode",
+						"groups_value",
+					]
+				}),
+				"restriction": () => restriction_logged_in,
+				"execution": () => ({"query_parameters": query_parameters, "input": input}) => {
+					const invite_id : _espe.type.invite_id = parseInt(query_parameters["id"]);
+					return (
+						_espe.service.invite.get_by_id(invite_id)
+						.then(
+							(invite_object) => Promise.resolve({
+								"status_code": 200,
+								"data": {
+									"key": invite_object.key,
+									"expiry": invite_object.expiry,
+									"membership_number_changeable": invite_object.membership_number_changeable,
+									"membership_number_value": invite_object.membership_number_value,
+									"name_changeable": invite_object.name_changeable,
+									"name_value": invite_object.name_value,
+									"email_address_changeable": invite_object.email_address_changeable,
+									"email_address_value": invite_object.email_address_value,
+									"groups_changeable": invite_object.groups_changeable,
+									"groups_value": invite_object.groups_value,
+								}
+							})
+						)
+						.catch(
+							(error) => Promise.resolve({
+								"status_code": 404,
+								"data": "not found"
+							})
+						)
+					);
+				}
+			}
+		);
+	}
+	
+}
diff --git a/source/api/functions.ts b/source/api/functions.ts
index 04dd3a1..38b74c0 100644
--- a/source/api/functions.ts
+++ b/source/api/functions.ts
@@ -62,6 +62,7 @@ namespace _espe.api
 		// invite
 		{
 			_espe.api.register_invite_list(rest_subject);
+			_espe.api.register_invite_read(rest_subject);
 			_espe.api.register_invite_create(rest_subject);
 			_espe.api.register_invite_examine(rest_subject);
 			_espe.api.register_invite_accept(rest_subject);
diff --git a/source/data/localization/deu.loc.json b/source/data/localization/deu.loc.json
index 3a5bcc2..8b5a524 100644
--- a/source/data/localization/deu.loc.json
+++ b/source/data/localization/deu.loc.json
@@ -14,6 +14,8 @@
 		"email.password_change.initialization.body": "Hi, {{name}}\n\nDie Funktion zum Ändern deines Passwortes wurde aufgerufen. Wenn du dein Passwort ändern willst, rufe folgenden Link auf:\n\n{{url}}\n",
 		"email.password_change.execution.subject": "Passwort-Änderung abgeschlossen",
 		"email.password_change.execution.body": "Hi, {{name}}\n\nDein Passwort wurde soeben geändert.\n",
+		"email.invitation.subject": "Einladung",
+		"email.invitation.body": "{{url}}",
 		"help.args.action.description": "auszuführende Aktion; Auswahl",
 		"help.args.action.options.serve": "Server starten",
 		"help.args.action.options.api_doc": "API-Dokumentation gemäß OpenAPI-Spezifikation auf Standard-Ausgabe schreiben",
diff --git a/source/data/localization/eng.loc.json b/source/data/localization/eng.loc.json
index b822ef3..0450b8b 100644
--- a/source/data/localization/eng.loc.json
+++ b/source/data/localization/eng.loc.json
@@ -14,6 +14,8 @@
 		"email.password_change.initialization.body": "Hi, {{name}}\n\nThe function for changing your password has been triggered. If you want to change your password, open the folloling link:\n\n{{url}}",
 		"email.password_change.execution.subject": "Password change concluded",
 		"email.password_change.execution.body": "Hi, {{name}}\n\nYour password has just been changed.\n",
+		"email.invitation.subject": "invitation",
+		"email.invitation.body": "{{url}}",
 		"help.args.action.description": "action to executo; options",
 		"help.args.action.options.serve": "start server",
 		"help.args.action.options.api_doc": "write API documentation according to OpenAPI specification to stdout",
diff --git a/source/services/invite.ts b/source/services/invite.ts
index 7629633..522b4f1 100644
--- a/source/services/invite.ts
+++ b/source/services/invite.ts
@@ -72,8 +72,12 @@ namespace _espe.service.invite
 		},
 		{
 			"expiry": expiry = -1,
+			"notification_target_url_template": notification_target_url_template = null,
+			"send_immediatly": send_immediatly = true,
 		} : {
 			expiry ?: (null | int);
+			notification_target_url_template ?: (null | string);
+			send_immediatly ?: boolean;
 		} = {
 		}
 	) : Promise<{id : _espe.type.invite_id; key : _espe.type.invite_key}>
@@ -114,6 +118,75 @@ namespace _espe.service.invite
 			"groups_value": groups_value,
 		};
 		const invite_id : _espe.type.invite_id = await _espe.repository.invite.create(invite_object);
+		// send link
+		{
+			if (! send_immediatly)
+			{
+				// do nothing
+			}
+			else
+			{
+				if (
+					! (
+						(
+							(email_address_value !== null)
+							&&
+							(email_address_value !== "")
+						)
+						&&
+						(notification_target_url_template !== null)
+					)
+				)
+				{
+					lib_plankton.log._warning(
+						"espe.service.invite.create.email.condition_unmet",
+						{
+							"details": {
+								"provided_address": email_address_value,
+								"notification_target_url_template": notification_target_url_template,
+							},
+						}
+					);
+				}
+				else
+				{
+					const url : (null | string) = _espe.helpers.frontend_url_get(
+						notification_target_url_template,
+						{
+							"key": invite_key,
+						}
+					);
+					try {
+						await _espe.helpers.email_send(
+							[email_address_value],
+							lib_plankton.translate.get(
+								"email.invitation.subject",
+								{
+								}
+							),
+							lib_plankton.translate.get(
+								"email.invitation.body",
+								{
+									"url": (url ?? "?"),
+								}
+							),
+						);
+					}
+					catch (error)
+					{
+						lib_plankton.log._error(
+							"espe.service.invite.create.email.could_not_be_sent",
+							{
+								"details": {
+									"provided_address": email_address_value,
+									"error": String(error),
+								},
+							}
+						);
+					}
+				}
+			}
+		}
 		return {
 			"id": invite_id,
 			"key": invite_key,
@@ -123,7 +196,17 @@ namespace _espe.service.invite
 	
 	/**
 	 */
-	function get(
+	export function get_by_id(
+		id : _espe.type.invite_id
+	) : Promise<_espe.type.invite_object>
+	{
+		return _espe.repository.invite.read(id)
+	}
+	
+	
+	/**
+	 */
+	function get_by_key(
 		key : _espe.type.invite_key
 	) : Promise<_espe.type.invite_object>
 	{
@@ -144,7 +227,7 @@ namespace _espe.service.invite
 	{
 		let invite_object : (null | _espe.type.invite_object);
 		try {
-			invite_object = await get(key);
+			invite_object = await get_by_key(key);
 		}
 		catch (error) {
 			invite_object = null;
diff --git a/tools/makefile b/tools/makefile
index f1554e2..fdd7da5 100644
--- a/tools/makefile
+++ b/tools/makefile
@@ -72,6 +72,7 @@ ${dir_temp}/espe-core.js ${dir_temp}/espe-core.d.ts: \
 		${dir_source}/api/actions/member_password_change_initialize.ts \
 		${dir_source}/api/actions/member_password_change_execute.ts \
 		${dir_source}/api/actions/invite_list.ts \
+		${dir_source}/api/actions/invite_read.ts \
 		${dir_source}/api/actions/invite_create.ts \
 		${dir_source}/api/actions/invite_examine.ts \
 		${dir_source}/api/actions/invite_accept.ts \