diff --git a/wrapper/src/main/java/wekan/wrapper/api/CardCommentService.java b/wrapper/src/main/java/wekan/wrapper/api/CardCommentService.java
new file mode 100644
index 0000000..b3e5e55
--- /dev/null
+++ b/wrapper/src/main/java/wekan/wrapper/api/CardCommentService.java
@@ -0,0 +1,41 @@
+package wekan.wrapper.api;
+
+import retrofit2.Call;
+import retrofit2.http.*;
+import wekan.wrapper.entity.Comment;
+
+import java.util.List;
+
+public interface CardCommentService {
+
+    /**
+     * Get all comments attached to a card.
+     *
+     * @param boardId   The ID of the board
+     * @param cardId    The ID of the card
+     * @return  The list of the comments
+     */
+    @GET("/api/boards/{boardId}/cards/{cardId}/comments")
+    Call<List<Comment>> getAllComments(
+            @Path("boardId") String boardId,
+            @Path("cardId") String cardId
+    );
+
+    /**
+     * Post new comment attached on the give card.
+     *
+     * @param boardId   The ID of the board
+     * @param cardId    The ID of the card
+     * @param authorId  The ID of the author
+     * @param comment   The comment
+     * @return  The id of the new comment
+     */
+    @FormUrlEncoded
+    @POST("/api/boards/{boardId}/cards/{cardId}/comments")
+    Call<Comment> postNewComment(
+            @Path("boardId") String boardId,
+            @Path("cardId") String cardId,
+            @Field("authorId") String authorId,
+            @Field("comment") String comment
+    );
+}
diff --git a/wrapper/src/main/java/wekan/wrapper/entity/Comment.java b/wrapper/src/main/java/wekan/wrapper/entity/Comment.java
new file mode 100644
index 0000000..2259dfa
--- /dev/null
+++ b/wrapper/src/main/java/wekan/wrapper/entity/Comment.java
@@ -0,0 +1,31 @@
+package wekan.wrapper.entity;
+
+import com.google.gson.annotations.SerializedName;
+
+public class Comment {
+    @SerializedName("_id")
+    private String id;
+    private String comment;
+    private String authorId;
+
+    public String getId() {
+        return id;
+    }
+
+    public String getComment() {
+        return comment;
+    }
+
+    public String getAuthorId() {
+        return authorId;
+    }
+
+    @Override
+    public String toString() {
+        return "Comment{" +
+                "id='" + id + '\'' +
+                ", comment='" + comment + '\'' +
+                ", authorId='" + authorId + '\'' +
+                '}';
+    }
+}
diff --git a/wrapper/src/test/java/wekan/wrapper/api/CardCommentServiceTest.java b/wrapper/src/test/java/wekan/wrapper/api/CardCommentServiceTest.java
new file mode 100644
index 0000000..666b15b
--- /dev/null
+++ b/wrapper/src/test/java/wekan/wrapper/api/CardCommentServiceTest.java
@@ -0,0 +1,107 @@
+package wekan.wrapper.api;
+
+import okhttp3.mockwebserver.MockResponse;
+import okhttp3.mockwebserver.MockWebServer;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import retrofit2.Retrofit;
+import retrofit2.converter.gson.GsonConverterFactory;
+import wekan.wrapper.entity.Color;
+import wekan.wrapper.entity.Comment;
+import wekan.wrapper.entity.Swimlane;
+
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+public class CardCommentServiceTest {
+    private MockWebServer mockWebServer = new MockWebServer();
+    private CardCommentService service = null;
+
+    @Before
+    public void setUp() {
+        try {
+            mockWebServer.start();
+            service = new Retrofit.Builder()
+                    .baseUrl(mockWebServer.url("/"))
+                    .addConverterFactory(GsonConverterFactory.create())
+                    .build()
+                    .create(CardCommentService.class);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @After
+    public void teardown() {
+        try {
+            mockWebServer.shutdown();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void getAllComments() {
+        MockResponse response = new MockResponse()
+                .setResponseCode(HttpURLConnection.HTTP_OK)
+                .setBody(
+                        "[ " + COMMENT_1 + ", " + COMMENT_2 + ", " + COMMENT_3 + " ]"
+                );
+
+        mockWebServer.enqueue(response);
+
+        try {
+            List<Comment> lists = service.getAllComments("board id", "card id")
+                    .execute().body();
+
+            assertNotNull(lists);
+            assertEquals(3, lists.size());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void postNewComment() {
+        MockResponse response = new MockResponse()
+                .setResponseCode(HttpURLConnection.HTTP_OK)
+                .setBody(COMMENT_1);
+
+        mockWebServer.enqueue(response);
+
+        try {
+            Comment comment = service.postNewComment(
+                    "board id",
+                    "card id",
+                    "author id",
+                    "comment"
+            ).execute().body();
+
+            assertNotNull(comment);
+            assertNotNull(comment.getId());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private final static String COMMENT_1 = "{" +
+            "\"_id\":\"zwzAgjHdW4fNJ9YLc\"," +
+            "\"comment\":\"comment 1\"," +
+            "\"authorId\":\"Si69gNgkJfQuk6uiJ\"" +
+            "}";
+    private final static String COMMENT_2 = "{" +
+            "\"_id\":\"zwzAgjHdW4fNJ9YLt\"," +
+            "\"comment\":\"comment 2\"," +
+            "\"authorId\":\"Si69gNgkJfQuk6uiJ\"" +
+            "}";
+    private final static String COMMENT_3 = "{" +
+            "\"_id\":\"zwzAgjHdW4fNJ9YLf\"," +
+            "\"comment\":\"comment 3\"," +
+            "\"authorId\":\"Si69gNgkJfQuk6uiJ\"" +
+            "}";
+}