diff --git a/src/main/java/eu/openaire/urls_controller/models/Assignment.java b/src/main/java/eu/openaire/urls_controller/models/Assignment.java
new file mode 100644
index 0000000..211243c
--- /dev/null
+++ b/src/main/java/eu/openaire/urls_controller/models/Assignment.java
@@ -0,0 +1,52 @@
+package eu.openaire.urls_controller.models;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.util.Date;
+import java.util.List;
+
+
+public class Assignment {
+
+    @JsonProperty("tasks")
+    List<Task> tasks;
+
+    @JsonProperty("workerId")
+    String workerId;
+
+    @JsonProperty("date")
+    Date date;
+
+    public List<Task> getTasks() {
+        return tasks;
+    }
+
+    public void setTasks(List<Task> tasks) {
+        this.tasks = tasks;
+    }
+
+    public String getWorkerId() {
+        return workerId;
+    }
+
+    public void setWorkerId(String workerId) {
+        this.workerId = workerId;
+    }
+
+    public Date getDate() {
+        return date;
+    }
+
+    public void setDate(Date date) {
+        this.date = date;
+    }
+
+    @Override
+    public String toString() {
+        return "Assignment{" +
+                "tasks=" + tasks +
+                ", workerId='" + workerId + '\'' +
+                ", date=" + date +
+                '}';
+    }
+}
diff --git a/src/main/java/eu/openaire/urls_controller/models/Error.java b/src/main/java/eu/openaire/urls_controller/models/Error.java
new file mode 100644
index 0000000..45a4ed5
--- /dev/null
+++ b/src/main/java/eu/openaire/urls_controller/models/Error.java
@@ -0,0 +1,36 @@
+package eu.openaire.urls_controller.models;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class Error {
+
+    @JsonProperty("type")
+    String type;
+
+    @JsonProperty("message")
+    String message;
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        type = type;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    @Override
+    public String toString() {
+        return "Error{" +
+                "type='" + type + '\'' +
+                ", message='" + message + '\'' +
+                '}';
+    }
+}
diff --git a/src/main/java/eu/openaire/urls_controller/models/Task.java b/src/main/java/eu/openaire/urls_controller/models/Task.java
new file mode 100644
index 0000000..9446ee4
--- /dev/null
+++ b/src/main/java/eu/openaire/urls_controller/models/Task.java
@@ -0,0 +1,36 @@
+package eu.openaire.urls_controller.models;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class Task {
+
+    @JsonProperty("id")
+    String id;
+
+    @JsonProperty("url")
+    String url;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    @Override
+    public String toString() {
+        return "Task{" +
+                "id='" + id + '\'' +
+                ", url='" + url + '\'' +
+                '}';
+    }
+}