diff --git a/src/main/java/com/resend/Resend.java b/src/main/java/com/resend/Resend.java
index bda3613..759878f 100644
--- a/src/main/java/com/resend/Resend.java
+++ b/src/main/java/com/resend/Resend.java
@@ -7,6 +7,7 @@
 import com.resend.services.contacts.Contacts;
 import com.resend.services.domains.Domains;
 import com.resend.services.emails.Emails;
+import com.resend.services.topics.Topics;
 import com.resend.services.templates.Templates;
 
 /**
@@ -91,6 +92,15 @@ public Broadcasts broadcasts() {
         return new Broadcasts(apiKey);
     }
 
+    /**
+     * Returns a Topics object that can be used to interact with the Topics service.
+     *
+     * @return A Topics object.
+     */
+    public Topics topics() {
+        return new Topics(apiKey);
+    }
+  
     /**
      * Returns a Templates object that can be used to interact with the Templates service.
      *
diff --git a/src/main/java/com/resend/services/topics/Topics.java b/src/main/java/com/resend/services/topics/Topics.java
new file mode 100644
index 0000000..97d5a7b
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/Topics.java
@@ -0,0 +1,136 @@
+package com.resend.services.topics;
+
+import com.resend.core.exception.ResendException;
+import com.resend.core.helper.URLHelper;
+import com.resend.core.net.AbstractHttpResponse;
+import com.resend.core.net.HttpMethod;
+import com.resend.core.net.ListParams;
+import com.resend.core.service.BaseService;
+import com.resend.services.topics.model.*;
+import okhttp3.MediaType;
+
+/**
+ * Represents the Resend Topics module.
+ */
+public final class Topics extends BaseService {
+
+    /**
+     * Constructs an instance of the {@code Topics} class.
+     *
+     * @param apiKey The apiKey used for authentication.
+     */
+    public Topics(final String apiKey) {
+        super(apiKey);
+    }
+
+    /**
+     * Creates a new topic.
+     *
+     * @param createTopicOptions The request containing topic details.
+     * @return The response indicating the status of the topic creation.
+     * @throws ResendException If an error occurs while creating the topic.
+     */
+    public CreateTopicResponseSuccess create(CreateTopicOptions createTopicOptions) throws ResendException {
+        String payload = super.resendMapper.writeValue(createTopicOptions);
+        AbstractHttpResponse<String> response = super.httpClient.perform("/topics", super.apiKey, HttpMethod.POST, payload, MediaType.get("application/json"));
+
+        if (!response.isSuccessful()) {
+            throw new ResendException(response.getCode(), response.getBody());
+        }
+
+        String responseBody = response.getBody();
+        return resendMapper.readValue(responseBody, CreateTopicResponseSuccess.class);
+    }
+
+    /**
+     * Retrieves a topic by its unique identifier.
+     *
+     * @param topicId The unique identifier of the topic.
+     * @return The retrieved topic's details.
+     * @throws ResendException If an error occurs while retrieving the topic.
+     */
+    public GetTopicResponseSuccess get(String topicId) throws ResendException {
+        AbstractHttpResponse<String> response = this.httpClient.perform("/topics/" + topicId, super.apiKey, HttpMethod.GET, null, MediaType.get("application/json"));
+
+        if (!response.isSuccessful()) {
+            throw new ResendException(response.getCode(), response.getBody());
+        }
+
+        String responseBody = response.getBody();
+        return resendMapper.readValue(responseBody, GetTopicResponseSuccess.class);
+    }
+
+    /**
+     * Updates a topic by its unique identifier.
+     *
+     * @param topicId The unique identifier of the topic.
+     * @param updateTopicOptions The new data for the topic.
+     * @return The response indicating the status of the topic update.
+     * @throws ResendException If an error occurs while updating the topic.
+     */
+    public UpdateTopicResponseSuccess update(String topicId, UpdateTopicOptions updateTopicOptions) throws ResendException {
+        String payload = super.resendMapper.writeValue(updateTopicOptions);
+        AbstractHttpResponse<String> response = this.httpClient.perform("/topics/" + topicId, super.apiKey, HttpMethod.PATCH, payload, MediaType.get("application/json"));
+
+        if (!response.isSuccessful()) {
+            throw new ResendException(response.getCode(), response.getBody());
+        }
+
+        String responseBody = response.getBody();
+        return resendMapper.readValue(responseBody, UpdateTopicResponseSuccess.class);
+    }
+
+    /**
+     * Removes a topic by its unique identifier.
+     *
+     * @param topicId The unique identifier of the topic.
+     * @return The response indicating the status of the topic removal.
+     * @throws ResendException If an error occurs while removing the topic.
+     */
+    public RemoveTopicResponseSuccess remove(String topicId) throws ResendException {
+        AbstractHttpResponse<String> response = this.httpClient.perform("/topics/" + topicId, super.apiKey, HttpMethod.DELETE, null, MediaType.get("application/json"));
+
+        if (!response.isSuccessful()) {
+            throw new ResendException(response.getCode(), response.getBody());
+        }
+
+        String responseBody = response.getBody();
+        return resendMapper.readValue(responseBody, RemoveTopicResponseSuccess.class);
+    }
+
+    /**
+     * Retrieves a list of topics and returns a List.
+     *
+     * @return A ListTopicsResponse containing the list of topics.
+     * @throws ResendException If an error occurs during the topics list retrieval process.
+     */
+    public ListTopicsResponseSuccess list() throws ResendException {
+        AbstractHttpResponse<String> response = this.httpClient.perform("/topics", super.apiKey, HttpMethod.GET, null, MediaType.get("application/json"));
+
+        if (!response.isSuccessful()) {
+            throw new ResendException(response.getCode(), response.getBody());
+        }
+
+        String responseBody = response.getBody();
+        return resendMapper.readValue(responseBody, ListTopicsResponseSuccess.class);
+    }
+
+    /**
+     * Retrieves a paginated list of topics and returns a List.
+     *
+     * @param params The params used to customize the list.
+     * @return A ListTopicsResponse containing the paginated list of topics.
+     * @throws ResendException If an error occurs during the topics list retrieval process.
+     */
+    public ListTopicsResponseSuccess list(ListParams params) throws ResendException {
+        String pathWithQuery = "/topics" + URLHelper.parse(params);
+        AbstractHttpResponse<String> response = this.httpClient.perform(pathWithQuery, super.apiKey, HttpMethod.GET, null, MediaType.get("application/json"));
+
+        if (!response.isSuccessful()) {
+            throw new ResendException(response.getCode(), response.getBody());
+        }
+
+        String responseBody = response.getBody();
+        return resendMapper.readValue(responseBody, ListTopicsResponseSuccess.class);
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/AbstractTopic.java b/src/main/java/com/resend/services/topics/model/AbstractTopic.java
new file mode 100644
index 0000000..12c2585
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/AbstractTopic.java
@@ -0,0 +1,153 @@
+package com.resend.services.topics.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Abstract base class representing common topic attributes.
+ * This class contains fields shared across different topic response types.
+ */
+public abstract class AbstractTopic {
+
+    /**
+     * The unique identifier of the topic.
+     */
+    @JsonProperty("id")
+    private String id;
+
+    /**
+     * The name of the topic.
+     */
+    @JsonProperty("name")
+    private String name;
+
+    /**
+     * The description of the topic.
+     */
+    @JsonProperty("description")
+    private String description;
+
+    /**
+     * The default subscription preference for new contacts.
+     */
+    @JsonProperty("default_subscription")
+    private String defaultSubscription;
+
+    /**
+     * The creation timestamp of the topic.
+     */
+    @JsonProperty("created_at")
+    private String createdAt;
+
+    /**
+     * Default constructor for creating an empty AbstractTopic object.
+     */
+    public AbstractTopic() {
+    }
+
+    /**
+     * Constructs an AbstractTopic with the provided attributes.
+     *
+     * @param id The unique identifier of the topic.
+     * @param name The name of the topic.
+     * @param description The description of the topic.
+     * @param defaultSubscription The default subscription preference.
+     * @param createdAt The creation timestamp.
+     */
+    public AbstractTopic(String id, String name, String description, String defaultSubscription, String createdAt) {
+        this.id = id;
+        this.name = name;
+        this.description = description;
+        this.defaultSubscription = defaultSubscription;
+        this.createdAt = createdAt;
+    }
+
+    /**
+     * Gets the unique identifier of the topic.
+     *
+     * @return The topic ID.
+     */
+    public String getId() {
+        return id;
+    }
+
+    /**
+     * Sets the unique identifier of the topic.
+     *
+     * @param id The topic ID to set.
+     */
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    /**
+     * Gets the name of the topic.
+     *
+     * @return The topic name.
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Sets the name of the topic.
+     *
+     * @param name The topic name to set.
+     */
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    /**
+     * Gets the description of the topic.
+     *
+     * @return The topic description.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Sets the description of the topic.
+     *
+     * @param description The topic description to set.
+     */
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    /**
+     * Gets the default subscription preference for new contacts.
+     *
+     * @return The default subscription preference.
+     */
+    public String getDefaultSubscription() {
+        return defaultSubscription;
+    }
+
+    /**
+     * Sets the default subscription preference for new contacts.
+     *
+     * @param defaultSubscription The default subscription preference to set.
+     */
+    public void setDefaultSubscription(String defaultSubscription) {
+        this.defaultSubscription = defaultSubscription;
+    }
+
+    /**
+     * Gets the creation timestamp of the topic.
+     *
+     * @return The creation timestamp.
+     */
+    public String getCreatedAt() {
+        return createdAt;
+    }
+
+    /**
+     * Sets the creation timestamp of the topic.
+     *
+     * @param createdAt The creation timestamp to set.
+     */
+    public void setCreatedAt(String createdAt) {
+        this.createdAt = createdAt;
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/CreateTopicOptions.java b/src/main/java/com/resend/services/topics/model/CreateTopicOptions.java
new file mode 100644
index 0000000..5017495
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/CreateTopicOptions.java
@@ -0,0 +1,125 @@
+package com.resend.services.topics.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Represents a request to create a topic.
+ */
+public class CreateTopicOptions {
+
+    /**
+     * The topic name.
+     */
+    @JsonProperty("name")
+    private final String name;
+
+    /**
+     * The default subscription preference for new contacts.
+     */
+    @JsonProperty("default_subscription")
+    private final String defaultSubscription;
+
+    /**
+     * The topic description.
+     */
+    @JsonProperty("description")
+    private final String description;
+
+    /**
+     * Private constructor used by the Builder.
+     *
+     * @param builder The builder instance.
+     */
+    private CreateTopicOptions(Builder builder) {
+        this.name = builder.name;
+        this.defaultSubscription = builder.defaultSubscription;
+        this.description = builder.description;
+    }
+
+    /**
+     * Retrieves the name of the topic.
+     *
+     * @return The topic name.
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Retrieves the default subscription preference for new contacts.
+     *
+     * @return The default subscription preference.
+     */
+    public String getDefaultSubscription() {
+        return defaultSubscription;
+    }
+
+    /**
+     * Retrieves the description of the topic.
+     *
+     * @return The topic description.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Creates a new builder instance to construct CreateTopicOptions.
+     *
+     * @return A new builder instance.
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Builder class for constructing CreateTopicOptions instances.
+     */
+    public static class Builder {
+        private String name;
+        private String defaultSubscription;
+        private String description;
+
+        /**
+         * Set the topic name.
+         *
+         * @param name The topic name. Max length is 50 characters.
+         * @return This builder instance for method chaining.
+         */
+        public Builder name(String name) {
+            this.name = name;
+            return this;
+        }
+
+        /**
+         * Set the default subscription preference for new contacts.
+         *
+         * @param defaultSubscription The default subscription preference. Possible values: "opt_in" or "opt_out".
+         * @return This builder instance for method chaining.
+         */
+        public Builder defaultSubscription(String defaultSubscription) {
+            this.defaultSubscription = defaultSubscription;
+            return this;
+        }
+
+        /**
+         * Set the topic description.
+         *
+         * @param description The topic description. Max length is 200 characters.
+         * @return This builder instance for method chaining.
+         */
+        public Builder description(String description) {
+            this.description = description;
+            return this;
+        }
+
+        /**
+         * Builds and returns a {@code CreateTopicOptions} based on the configured properties.
+         *
+         * @return A {@code CreateTopicOptions} instance.
+         */
+        public CreateTopicOptions build() {
+            return new CreateTopicOptions(this);
+        }
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/CreateTopicResponseSuccess.java b/src/main/java/com/resend/services/topics/model/CreateTopicResponseSuccess.java
new file mode 100644
index 0000000..cad806a
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/CreateTopicResponseSuccess.java
@@ -0,0 +1,48 @@
+package com.resend.services.topics.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Represents a response after creating a topic.
+ */
+public class CreateTopicResponseSuccess {
+
+    /**
+     * The unique identifier associated with the topic.
+     */
+    @JsonProperty("id")
+    private String id;
+
+    /**
+     * Constructs a new instance of {@code CreateTopicResponse}.
+     */
+    public CreateTopicResponseSuccess() {
+    }
+
+    /**
+     * Constructs a CreateTopicResponse with the provided ID.
+     *
+     * @param id The ID associated with the created topic.
+     */
+    public CreateTopicResponseSuccess(String id) {
+        this.id = id;
+    }
+
+    /**
+     * Retrieves the ID associated with the created topic.
+     *
+     * @return The ID of the created topic.
+     */
+    public String getId() {
+        return id;
+    }
+
+    /**
+     * Sets the ID for the created topic.
+     *
+     * @param id The ID to be set.
+     */
+    public void setId(String id) {
+        this.id = id;
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/GetTopicResponseSuccess.java b/src/main/java/com/resend/services/topics/model/GetTopicResponseSuccess.java
new file mode 100644
index 0000000..0c8f793
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/GetTopicResponseSuccess.java
@@ -0,0 +1,27 @@
+package com.resend.services.topics.model;
+
+/**
+ * Represents a successful response when getting a single topic.
+ */
+public class GetTopicResponseSuccess extends AbstractTopic {
+
+    /**
+     * Default constructor for creating an empty GetTopicResponseSuccess object.
+     */
+    public GetTopicResponseSuccess() {
+        super();
+    }
+
+    /**
+     * Constructs a GetTopicResponseSuccess with the provided attributes.
+     *
+     * @param id The unique identifier of the topic.
+     * @param name The name of the topic.
+     * @param description The description of the topic.
+     * @param defaultSubscription The default subscription preference.
+     * @param createdAt The creation timestamp.
+     */
+    public GetTopicResponseSuccess(String id, String name, String description, String defaultSubscription, String createdAt) {
+        super(id, name, description, defaultSubscription, createdAt);
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/ListTopicsResponseSuccess.java b/src/main/java/com/resend/services/topics/model/ListTopicsResponseSuccess.java
new file mode 100644
index 0000000..845b470
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/ListTopicsResponseSuccess.java
@@ -0,0 +1,101 @@
+package com.resend.services.topics.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import java.util.List;
+
+/**
+ * Represents a successful response for listing topics.
+ */
+public class ListTopicsResponseSuccess {
+
+    /**
+     * The object type of the response.
+     */
+    @JsonProperty("object")
+    private String object;
+
+    /**
+     * The list of topics.
+     */
+    @JsonProperty("data")
+    private List<Topic> data;
+
+    /**
+     * Indicates whether there are more topics available for pagination.
+     */
+    @JsonProperty("has_more")
+    private Boolean hasMore;
+
+    /**
+     * Default constructor
+     */
+    public ListTopicsResponseSuccess() {
+    }
+
+    /**
+     * Constructs a successful response for listing topics.
+     *
+     * @param object The object type of the response.
+     * @param data The list of topics.
+     * @param hasMore Whether there are more topics available for pagination.
+     */
+    public ListTopicsResponseSuccess(String object, List<Topic> data, Boolean hasMore) {
+        this.object = object;
+        this.data = data;
+        this.hasMore = hasMore;
+    }
+
+    /**
+     * Gets the object type of the response.
+     *
+     * @return The object type.
+     */
+    public String getObject() {
+        return object;
+    }
+
+    /**
+     * Sets the object type of the response.
+     *
+     * @param object The object type to set.
+     */
+    public void setObject(String object) {
+        this.object = object;
+    }
+
+    /**
+     * Gets the list of topics.
+     *
+     * @return The list of topics.
+     */
+    public List<Topic> getData() {
+        return data;
+    }
+
+    /**
+     * Sets the list of topics.
+     *
+     * @param data The list of topics to set.
+     */
+    public void setData(List<Topic> data) {
+        this.data = data;
+    }
+
+    /**
+     * Gets the indicator whether there are more items available for pagination.
+     *
+     * @return Whether there are more items available for pagination.
+     */
+    public Boolean hasMore() {
+        return hasMore;
+    }
+
+    /**
+     * Sets the indicator whether there are more items available for pagination.
+     *
+     * @param hasMore Whether there are more items available for pagination.
+     */
+    public void setHasMore(Boolean hasMore) {
+        this.hasMore = hasMore;
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/RemoveTopicResponseSuccess.java b/src/main/java/com/resend/services/topics/model/RemoveTopicResponseSuccess.java
new file mode 100644
index 0000000..5fa5196
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/RemoveTopicResponseSuccess.java
@@ -0,0 +1,100 @@
+package com.resend.services.topics.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Represents a response object for a topic deletion operation.
+ */
+public class RemoveTopicResponseSuccess {
+
+    /**
+     * The object type of the response.
+     */
+    @JsonProperty("object")
+    private String object;
+
+    /**
+     * The unique identifier associated with the topic.
+     */
+    @JsonProperty("id")
+    private String id;
+
+    /**
+     * A boolean flag indicating whether the topic was successfully deleted.
+     */
+    @JsonProperty("deleted")
+    private boolean deleted;
+
+    /**
+     * Default constructor for creating an empty RemoveTopicResponse object.
+     */
+    public RemoveTopicResponseSuccess() {
+    }
+
+    /**
+     * Constructor to create a RemoveTopicResponse object with the provided attributes.
+     *
+     * @param object The object type of the response.
+     * @param id The unique identifier associated with the topic.
+     * @param deleted A boolean flag indicating whether the topic was successfully deleted.
+     */
+    public RemoveTopicResponseSuccess(String object, String id, boolean deleted) {
+        this.object = object;
+        this.id = id;
+        this.deleted = deleted;
+    }
+
+    /**
+     * Get the object type of the response.
+     *
+     * @return The object type.
+     */
+    public String getObject() {
+        return object;
+    }
+
+    /**
+     * Set the object type of the response.
+     *
+     * @param object The object type to set.
+     */
+    public void setObject(String object) {
+        this.object = object;
+    }
+
+    /**
+     * Get the unique identifier associated with the topic.
+     *
+     * @return The unique identifier.
+     */
+    public String getId() {
+        return id;
+    }
+
+    /**
+     * Set the unique identifier associated with the topic.
+     *
+     * @param id The unique identifier to set.
+     */
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    /**
+     * Get the boolean flag indicating whether the topic was successfully deleted.
+     *
+     * @return True if the topic was successfully deleted; otherwise, false.
+     */
+    public boolean isDeleted() {
+        return deleted;
+    }
+
+    /**
+     * Set the boolean flag indicating whether the topic was successfully deleted.
+     *
+     * @param deleted The deletion status to set.
+     */
+    public void setDeleted(boolean deleted) {
+        this.deleted = deleted;
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/Topic.java b/src/main/java/com/resend/services/topics/model/Topic.java
new file mode 100644
index 0000000..813f906
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/Topic.java
@@ -0,0 +1,28 @@
+package com.resend.services.topics.model;
+
+/**
+ * Represents a topic in a list response.
+ * This class is used when topics are returned as part of a collection.
+ */
+public class Topic extends AbstractTopic {
+
+    /**
+     * Default constructor for creating an empty Topic object.
+     */
+    public Topic() {
+        super();
+    }
+
+    /**
+     * Constructs a Topic with the provided attributes.
+     *
+     * @param id The unique identifier of the topic.
+     * @param name The name of the topic.
+     * @param description The description of the topic.
+     * @param defaultSubscription The default subscription preference.
+     * @param createdAt The creation timestamp.
+     */
+    public Topic(String id, String name, String description, String defaultSubscription, String createdAt) {
+        super(id, name, description, defaultSubscription, createdAt);
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/UpdateTopicOptions.java b/src/main/java/com/resend/services/topics/model/UpdateTopicOptions.java
new file mode 100644
index 0000000..320063c
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/UpdateTopicOptions.java
@@ -0,0 +1,97 @@
+package com.resend.services.topics.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Represents a request to update a topic.
+ */
+public class UpdateTopicOptions {
+
+    /**
+     * The topic name.
+     */
+    @JsonProperty("name")
+    private final String name;
+
+    /**
+     * The topic description.
+     */
+    @JsonProperty("description")
+    private final String description;
+
+    /**
+     * Private constructor used by the Builder.
+     *
+     * @param builder The builder instance.
+     */
+    private UpdateTopicOptions(Builder builder) {
+        this.name = builder.name;
+        this.description = builder.description;
+    }
+
+    /**
+     * Retrieves the name of the topic.
+     *
+     * @return The topic name.
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Retrieves the description of the topic.
+     *
+     * @return The topic description.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Creates a new builder instance to construct UpdateTopicOptions.
+     *
+     * @return A new builder instance.
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Builder class for constructing UpdateTopicOptions instances.
+     */
+    public static class Builder {
+        private String name;
+        private String description;
+
+        /**
+         * Set the topic name.
+         *
+         * @param name The topic name. Max length is 50 characters.
+         * @return This builder instance for method chaining.
+         */
+        public Builder name(String name) {
+            this.name = name;
+            return this;
+        }
+
+        /**
+         * Set the topic description.
+         *
+         * @param description The topic description. Max length is 200 characters.
+         * @return This builder instance for method chaining.
+         */
+        public Builder description(String description) {
+            this.description = description;
+            return this;
+        }
+
+        /**
+         * Builds and returns a {@code UpdateTopicOptions} based on the configured properties.
+         *
+         * @return A {@code UpdateTopicOptions} instance.
+         */
+        public UpdateTopicOptions build() {
+            return new UpdateTopicOptions(this);
+        }
+    }
+}
diff --git a/src/main/java/com/resend/services/topics/model/UpdateTopicResponseSuccess.java b/src/main/java/com/resend/services/topics/model/UpdateTopicResponseSuccess.java
new file mode 100644
index 0000000..d17def5
--- /dev/null
+++ b/src/main/java/com/resend/services/topics/model/UpdateTopicResponseSuccess.java
@@ -0,0 +1,48 @@
+package com.resend.services.topics.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Represents a response after updating a topic.
+ */
+public class UpdateTopicResponseSuccess {
+
+    /**
+     * The unique identifier associated with the topic.
+     */
+    @JsonProperty("id")
+    private String id;
+
+    /**
+     * Constructs a new instance of {@code UpdateTopicResponse}.
+     */
+    public UpdateTopicResponseSuccess() {
+    }
+
+    /**
+     * Constructs an UpdateTopicResponse with the provided ID.
+     *
+     * @param id The ID associated with the updated topic.
+     */
+    public UpdateTopicResponseSuccess(String id) {
+        this.id = id;
+    }
+
+    /**
+     * Retrieves the ID associated with the updated topic.
+     *
+     * @return The ID of the updated topic.
+     */
+    public String getId() {
+        return id;
+    }
+
+    /**
+     * Sets the ID for the updated topic.
+     *
+     * @param id The ID to be set.
+     */
+    public void setId(String id) {
+        this.id = id;
+    }
+}
diff --git a/src/test/java/com/resend/services/topics/TopicsTest.java b/src/test/java/com/resend/services/topics/TopicsTest.java
new file mode 100644
index 0000000..3cfd048
--- /dev/null
+++ b/src/test/java/com/resend/services/topics/TopicsTest.java
@@ -0,0 +1,119 @@
+package com.resend.services.topics;
+
+import com.resend.core.exception.ResendException;
+import com.resend.core.net.ListParams;
+import com.resend.services.topics.model.*;
+import com.resend.services.util.TopicsUtil;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.Mockito.*;
+
+/**
+ * Test class for Topics service.
+ */
+public class TopicsTest {
+
+    @Mock
+    private Topics topics;
+
+    @BeforeEach
+    public void setUp() {
+        MockitoAnnotations.openMocks(this);
+        topics = mock(Topics.class);
+    }
+
+    @Test
+    public void testCreateTopic_Success() throws ResendException {
+        CreateTopicOptions createOptions = TopicsUtil.createTopicOptions();
+        CreateTopicResponseSuccess expectedResponse = TopicsUtil.createTopicResponse();
+
+        when(topics.create(createOptions)).thenReturn(expectedResponse);
+
+        CreateTopicResponseSuccess response = topics.create(createOptions);
+
+        assertNotNull(response);
+        assertEquals(expectedResponse.getId(), response.getId());
+        verify(topics, times(1)).create(createOptions);
+    }
+
+    @Test
+    public void testGetTopic_Success() throws ResendException {
+        GetTopicResponseSuccess expectedTopic = TopicsUtil.createTopic();
+
+        when(topics.get(expectedTopic.getId())).thenReturn(expectedTopic);
+
+        GetTopicResponseSuccess retrievedTopic = topics.get(expectedTopic.getId());
+
+        assertNotNull(retrievedTopic);
+        assertEquals(expectedTopic.getId(), retrievedTopic.getId());
+        assertEquals(expectedTopic.getName(), retrievedTopic.getName());
+        assertEquals(expectedTopic.getDescription(), retrievedTopic.getDescription());
+        assertEquals(expectedTopic.getDefaultSubscription(), retrievedTopic.getDefaultSubscription());
+        verify(topics, times(1)).get(expectedTopic.getId());
+    }
+
+    @Test
+    public void testUpdateTopic_Success() throws ResendException {
+        String topicId = "b6d24b8e-af0b-4c3c-be0c-359bbd97381e";
+        UpdateTopicOptions updateOptions = TopicsUtil.updateTopicOptions();
+        UpdateTopicResponseSuccess expectedResponse = TopicsUtil.updateTopicResponse();
+
+        when(topics.update(topicId, updateOptions)).thenReturn(expectedResponse);
+
+        UpdateTopicResponseSuccess response = topics.update(topicId, updateOptions);
+
+        assertNotNull(response);
+        assertEquals(expectedResponse.getId(), response.getId());
+        verify(topics, times(1)).update(topicId, updateOptions);
+    }
+
+    @Test
+    public void testRemoveTopic_Success() throws ResendException {
+        String topicId = "b6d24b8e-af0b-4c3c-be0c-359bbd97381e";
+        RemoveTopicResponseSuccess expectedResponse = TopicsUtil.removeTopicResponse();
+
+        when(topics.remove(topicId)).thenReturn(expectedResponse);
+
+        RemoveTopicResponseSuccess response = topics.remove(topicId);
+
+        assertNotNull(response);
+        assertEquals(expectedResponse.getId(), response.getId());
+        assertEquals(true, response.isDeleted());
+        verify(topics, times(1)).remove(topicId);
+    }
+
+    @Test
+    public void testListTopics_Success() throws ResendException {
+        ListTopicsResponseSuccess expectedResponse = TopicsUtil.createListTopicsResponse();
+
+        when(topics.list()).thenReturn(expectedResponse);
+
+        ListTopicsResponseSuccess response = topics.list();
+
+        assertNotNull(response);
+        assertEquals(expectedResponse.getData().size(), response.getData().size());
+        assertEquals(expectedResponse.hasMore(), response.hasMore());
+        verify(topics, times(1)).list();
+    }
+
+    @Test
+    public void testListTopicsWithPagination_Success() throws ResendException {
+        ListParams params = ListParams.builder()
+                .limit(3)
+                .build();
+        ListTopicsResponseSuccess expectedResponse = TopicsUtil.createListTopicsResponse();
+
+        when(topics.list(params)).thenReturn(expectedResponse);
+
+        ListTopicsResponseSuccess response = topics.list(params);
+
+        assertNotNull(response);
+        assertEquals(expectedResponse.getData().size(), response.getData().size());
+        verify(topics, times(1)).list(params);
+    }
+}
diff --git a/src/test/java/com/resend/services/util/TopicsUtil.java b/src/test/java/com/resend/services/util/TopicsUtil.java
new file mode 100644
index 0000000..9d09d50
--- /dev/null
+++ b/src/test/java/com/resend/services/util/TopicsUtil.java
@@ -0,0 +1,123 @@
+package com.resend.services.util;
+
+import com.resend.services.topics.model.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Utility class for creating test data for Topics service tests.
+ */
+public class TopicsUtil {
+
+    /**
+     * Creates a sample CreateTopicOptions for testing.
+     *
+     * @return A CreateTopicOptions instance.
+     */
+    public static CreateTopicOptions createTopicOptions() {
+        return CreateTopicOptions.builder()
+                .name("Weekly Newsletter")
+                .defaultSubscription("opt_in")
+                .description("Subscribe to our weekly newsletter for updates")
+                .build();
+    }
+
+    /**
+     * Creates a sample UpdateTopicOptions for testing.
+     *
+     * @return An UpdateTopicOptions instance.
+     */
+    public static UpdateTopicOptions updateTopicOptions() {
+        return UpdateTopicOptions.builder()
+                .name("Monthly Newsletter")
+                .description("Subscribe to our monthly newsletter for updates")
+                .build();
+    }
+
+    /**
+     * Creates a sample CreateTopicResponse for testing.
+     *
+     * @return A CreateTopicResponse instance.
+     */
+    public static CreateTopicResponseSuccess createTopicResponse() {
+        return new CreateTopicResponseSuccess("b6d24b8e-af0b-4c3c-be0c-359bbd97381e");
+    }
+
+    /**
+     * Creates a sample UpdateTopicResponse for testing.
+     *
+     * @return An UpdateTopicResponse instance.
+     */
+    public static UpdateTopicResponseSuccess updateTopicResponse() {
+        return new UpdateTopicResponseSuccess("b6d24b8e-af0b-4c3c-be0c-359bbd97381e");
+    }
+
+    /**
+     * Creates a sample RemoveTopicResponse for testing.
+     *
+     * @return A RemoveTopicResponse instance.
+     */
+    public static RemoveTopicResponseSuccess removeTopicResponse() {
+        return new RemoveTopicResponseSuccess("topic", "b6d24b8e-af0b-4c3c-be0c-359bbd97381e", true);
+    }
+
+    /**
+     * Creates a sample Topic for testing.
+     *
+     * @return A Topic instance.
+     */
+    public static GetTopicResponseSuccess createTopic() {
+        return new GetTopicResponseSuccess(
+                "b6d24b8e-af0b-4c3c-be0c-359bbd97381e",
+                "Weekly Newsletter",
+                "Weekly newsletter for our subscribers",
+                "opt_in",
+                "2023-04-08T00:11:13.110779+00:00"
+        );
+    }
+
+    /**
+     * Creates a list of sample Topics for testing.
+     *
+     * @return A list of Topic instances.
+     */
+    public static List<Topic> createTopicList() {
+        List<Topic> topics = new ArrayList<>();
+
+        topics.add(new Topic(
+                "b6d24b8e-af0b-4c3c-be0c-359bbd97381e",
+                "Weekly Newsletter",
+                "Weekly newsletter for our subscribers",
+                "opt_in",
+                "2023-04-08T00:11:13.110779+00:00"
+        ));
+
+        topics.add(new Topic(
+                "c7e35c9f-bg1c-5d4d-cf1d-460cce08492f",
+                "Monthly Updates",
+                "Monthly updates and announcements",
+                "opt_out",
+                "2023-04-09T00:11:13.110779+00:00"
+        ));
+
+        topics.add(new Topic(
+                "d8f46da0-ch2d-6e5e-dg2e-571ddf19503g",
+                "Product Launches",
+                "Get notified about new product launches",
+                "opt_in",
+                "2023-04-10T00:11:13.110779+00:00"
+        ));
+
+        return topics;
+    }
+
+    /**
+     * Creates a sample ListTopicsResponse for testing.
+     *
+     * @return A ListTopicsResponse instance.
+     */
+    public static ListTopicsResponseSuccess createListTopicsResponse() {
+        return new ListTopicsResponseSuccess("list", createTopicList(), false);
+    }
+}