diff --git a/src/App.tsx b/src/App.tsx
index 017957182..c51b739e3 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -8,53 +8,119 @@ import { PostsList } from './components/PostsList';
 import { PostDetails } from './components/PostDetails';
 import { UserSelector } from './components/UserSelector';
 import { Loader } from './components/Loader';
+import { useEffect, useState } from 'react';
+import { User } from './types/User';
+import { userClient } from './utils/userClient';
+import { postClient } from './utils/postClient';
+import { Post } from './types/Post';
 
-export const App = () => (
-  <main className="section">
-    <div className="container">
-      <div className="tile is-ancestor">
-        <div className="tile is-parent">
-          <div className="tile is-child box is-success">
-            <div className="block">
-              <UserSelector />
-            </div>
+export const App = () => {
+  const [users, setUsers] = useState<User[]>([]);
+  const [userSelected, setUserSelected] = useState<User | null>(null);
+  const [userSelPosts, setUserSelPosts] = useState<Post[]>([]);
+  const [openedPost, setOpendPost] = useState<Post | null>(null);
+  const [error, setError] = useState(false);
+  const [loading, setLoading] = useState(false);
 
-            <div className="block" data-cy="MainContent">
-              <p data-cy="NoSelectedUser">No user selected</p>
+  const readyToShowPosts = userSelected && !loading;
 
-              <Loader />
+  useEffect(() => {
+    setLoading(true);
+    userClient
+      .getAll()
+      .then(res => {
+        setUsers(res);
+        setError(false);
+      })
+      .catch(() => setError(true))
+      .finally(() => setLoading(false));
+  }, []);
 
-              <div
-                className="notification is-danger"
-                data-cy="PostsLoadingError"
-              >
-                Something went wrong!
-              </div>
+  useEffect(() => {
+    setOpendPost(null);
+
+    if (userSelected) {
+      setLoading(true);
+      postClient
+        .get(userSelected.id)
+        .then(res => {
+          setUserSelPosts(() => res);
+          setError(false);
+        })
+        .catch(() => setError(true))
+        .finally(() => {
+          setLoading(false);
+        });
+    }
+  }, [userSelected]);
 
-              <div className="notification is-warning" data-cy="NoPostsYet">
-                No posts yet
+  const handleUserSelect = (user: User) => {
+    setUserSelected(user);
+  };
+
+  return (
+    <main className="section">
+      <div className="container">
+        <div className="tile is-ancestor">
+          <div className="tile is-parent">
+            <div className="tile is-child box is-success">
+              <div className="block">
+                <UserSelector
+                  users={users}
+                  selectedUser={userSelected}
+                  onSelect={handleUserSelect}
+                />
               </div>
 
-              <PostsList />
+              <div className="block" data-cy="MainContent">
+                {!userSelected && (
+                  <p data-cy="NoSelectedUser">No user selected</p>
+                )}
+
+                {loading && <Loader />}
+
+                {error && (
+                  <div
+                    className="notification is-danger"
+                    data-cy="PostsLoadingError"
+                  >
+                    Something went wrong!
+                  </div>
+                )}
+
+                {readyToShowPosts && userSelPosts.length > 0 && (
+                  <PostsList
+                    posts={userSelPosts}
+                    openedPost={openedPost}
+                    onOpen={setOpendPost}
+                  />
+                )}
+
+                {readyToShowPosts && userSelPosts.length <= 0 && (
+                  <div className="notification is-warning" data-cy="NoPostsYet">
+                    No posts yet
+                  </div>
+                )}
+              </div>
             </div>
           </div>
-        </div>
 
-        <div
-          data-cy="Sidebar"
-          className={classNames(
-            'tile',
-            'is-parent',
-            'is-8-desktop',
-            'Sidebar',
-            'Sidebar--open',
-          )}
-        >
-          <div className="tile is-child box is-success ">
-            <PostDetails />
+          <div
+            data-cy="Sidebar"
+            className={classNames(
+              'tile',
+              'is-parent',
+              'is-8-desktop',
+              'Sidebar',
+              { 'Sidebar--close': !openedPost, 'Sidebar--open': openedPost },
+            )}
+          >
+            <div className="tile is-child box is-success ">
+              <PostDetails post={openedPost} />
+            </div>
           </div>
         </div>
       </div>
-    </div>
-  </main>
-);
+    </main>
+  );
+};
diff --git a/src/components/Comment.tsx b/src/components/Comment.tsx
new file mode 100644
index 000000000..3343cf5fe
--- /dev/null
+++ b/src/components/Comment.tsx
@@ -0,0 +1,33 @@
+import { Comment } from '../types/Comment';
+
+type Props = {
+  comment: Comment;
+  onDelete: (id: number) => void;
+};
+
+export const CommentObj: React.FC<Props> = ({ comment, onDelete }) => {
+  const { id, email, name, body } = comment;
+
+  return (
+    <article key={id} className="message is-small" data-cy="Comment">
+      <div className="message-header">
+        <a href={`mailto:${email}`} data-cy="CommentAuthor">
+          {name}
+        </a>
+        <button
+          data-cy="CommentDelete"
+          type="button"
+          className="delete is-small"
+          aria-label="delete"
+          onClick={() => onDelete(id)}
+        >
+          delete button
+        </button>
+      </div>
+
+      <div className="message-body" data-cy="CommentBody">
+        {body}
+      </div>
+    </article>
+  );
+};
diff --git a/src/components/CommentList.tsx b/src/components/CommentList.tsx
new file mode 100644
index 000000000..5fa7cf8d0
--- /dev/null
+++ b/src/components/CommentList.tsx
@@ -0,0 +1,29 @@
+import { Comment } from '../types/Comment';
+import { CommentObj } from './Comment';
+
+type Props = {
+  comments: Comment[];
+  onDelete: (id: number) => void;
+};
+
+export const CommentList: React.FC<Props> = ({ comments, onDelete }) => {
+  return (
+    <>
+      {comments.length > 0 ? (
+        comments.map(comment => {
+          return (
+            <CommentObj
+              key={comment.id}
+              comment={comment}
+              onDelete={onDelete}
+            />
+          );
+        })
+      ) : (
+        <p className="title is-4" data-cy="NoCommentsMessage">
+          No comments yet
+        </p>
+      )}
+    </>
+  );
+};
diff --git a/src/components/NewCommentForm.tsx b/src/components/NewCommentForm.tsx
index 73a8a0b45..9006b8462 100644
--- a/src/components/NewCommentForm.tsx
+++ b/src/components/NewCommentForm.tsx
@@ -1,8 +1,83 @@
-import React from 'react';
+import React, { useState } from 'react';
+import { Post } from '../types/Post';
+import classNames from 'classnames';
+import { commentClient } from '../utils/commentsClient';
+
+type Props = {
+  post: Post;
+  onError: (error: boolean) => void;
+  onUpdate: (v: number | null) => void;
+};
+export const NewCommentForm: React.FC<Props> = ({
+  post,
+  onError,
+  onUpdate,
+}) => {
+  const [errorName, setErrorName] = useState(false);
+  const [errorEmail, setErrorEmail] = useState(false);
+  const [errorbody, setErrorBody] = useState(false);
+  const [isLoading, setIsLoading] = useState(false);
+  const [name, setName] = useState('');
+  const [email, setEmail] = useState('');
+  const [body, setBody] = useState('');
+
+  const anyErrorCheck = () => {
+    const errors = [];
+
+    setErrorName(!name.trim());
+    errors.push(!name.trim());
+
+    setErrorEmail(!email.trim());
+    errors.push(!email.trim());
+
+    setErrorBody(!body.trim());
+    errors.push(!body.trim());
+
+    return errors.some(e => e === true);
+  };
+
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+    setIsLoading(true);
+
+    if (anyErrorCheck()) {
+      setIsLoading(false);
+
+      return;
+    }
+
+    commentClient
+      .add({
+        postId: post.id,
+        name: name.trim(),
+        email: email.trim(),
+        body: body.trim(),
+      })
+      .then(res => {
+        if (!res.id) {
+          throw new Error();
+        }
+
+        setBody('');
+        onUpdate(Math.random());
+      })
+      .catch(() => onError(true))
+      .finally(() => setIsLoading(false));
+  };
+
+  const handleClear = () => {
+    setBody('');
+    setErrorName(false);
+    setErrorEmail(false);
+    setErrorBody(false);
+  };
 
-export const NewCommentForm: React.FC = () => {
   return (
-    <form data-cy="NewCommentForm">
+    <form
+      data-cy="NewCommentForm"
+      onSubmit={handleSubmit}
+      onReset={handleClear}
+    >
       <div className="field" data-cy="NameField">
         <label className="label" htmlFor="comment-author-name">
           Author Name
@@ -14,24 +89,29 @@ export const NewCommentForm: React.FC = () => {
             name="name"
             id="comment-author-name"
             placeholder="Name Surname"
-            className="input is-danger"
+            className={classNames('input', { 'is-danger': errorName })}
+            value={name}
+            onChange={e => setName(e.target.value)}
           />
 
           <span className="icon is-small is-left">
             <i className="fas fa-user" />
           </span>
 
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
-          </span>
+          {errorName && (
+            <span
+              className="icon is-small is-right has-text-danger"
+              data-cy="ErrorIcon"
+            >
+              <i className="fas fa-exclamation-triangle" />
+            </span>
+          )}
         </div>
-
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Name is required
-        </p>
+        {errorName && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            Name is required
+          </p>
+        )}
       </div>
 
       <div className="field" data-cy="EmailField">
@@ -41,28 +121,32 @@ export const NewCommentForm: React.FC = () => {
 
         <div className="control has-icons-left has-icons-right">
           <input
-            type="text"
+            type="email"
             name="email"
             id="comment-author-email"
             placeholder="email@test.com"
-            className="input is-danger"
+            className={classNames('input', { 'is-danger': errorEmail })}
+            value={email}
+            onChange={e => setEmail(e.target.value)}
           />
 
           <span className="icon is-small is-left">
             <i className="fas fa-envelope" />
           </span>
-
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
-          </span>
+          {errorEmail && (
+            <span
+              className="icon is-small is-right has-text-danger"
+              data-cy="ErrorIcon"
+            >
+              <i className="fas fa-exclamation-triangle" />
+            </span>
+          )}
         </div>
-
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Email is required
-        </p>
+        {errorEmail && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            Email is required
+          </p>
+        )}
       </div>
 
       <div className="field" data-cy="BodyField">
@@ -75,18 +159,26 @@ export const NewCommentForm: React.FC = () => {
             id="comment-body"
             name="body"
             placeholder="Type comment here"
-            className="textarea is-danger"
+            className={classNames('textarea', { 'is-danger': errorbody })}
+            value={body}
+            onChange={e => setBody(e.target.value)}
           />
         </div>
-
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Enter some text
-        </p>
+        {errorbody && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            Enter some text
+          </p>
+        )}
       </div>
 
       <div className="field is-grouped">
         <div className="control">
-          <button type="submit" className="button is-link is-loading">
+          <button
+            type="submit"
+            className={classNames('button is-link', {
+              'is-loading': isLoading,
+            })}
+          >
             Add
           </button>
         </div>
diff --git a/src/components/PostDetails.tsx b/src/components/PostDetails.tsx
index 2f82db916..f69845ced 100644
--- a/src/components/PostDetails.tsx
+++ b/src/components/PostDetails.tsx
@@ -1,106 +1,95 @@
-import React from 'react';
-import { Loader } from './Loader';
-import { NewCommentForm } from './NewCommentForm';
+import React, { useCallback, useEffect, useState } from 'react';
+import { commentClient } from '../utils/commentsClient';
 
-export const PostDetails: React.FC = () => {
-  return (
-    <div className="content" data-cy="PostDetails">
-      <div className="content" data-cy="PostDetails">
-        <div className="block">
-          <h2 data-cy="PostTitle">
-            #18: voluptate et itaque vero tempora molestiae
-          </h2>
+import { Post } from '../types/Post';
+import { Comment } from '../types/Comment';
 
-          <p data-cy="PostBody">
-            eveniet quo quis laborum totam consequatur non dolor ut et est
-            repudiandae est voluptatem vel debitis et magnam
-          </p>
-        </div>
+import { Loader } from './Loader';
+import { NewCommentForm } from './NewCommentForm';
+import { CommentList } from './CommentList';
 
-        <div className="block">
-          <Loader />
+type Props = {
+  post: Post | null;
+};
 
-          <div className="notification is-danger" data-cy="CommentsError">
-            Something went wrong
-          </div>
+export const PostDetails: React.FC<Props> = ({ post }) => {
+  const [comments, setComments] = useState<Comment[]>([]);
+  const [error, setError] = useState(false);
+  const [loading, setLoading] = useState(false);
+  const [commenting, setCommenting] = useState(false);
+  const [updateFlag, setUpdateFlag] = useState<number | null>(null);
 
-          <p className="title is-4" data-cy="NoCommentsMessage">
-            No comments yet
-          </p>
+  const readyToComment = !error && !loading;
 
-          <p className="title is-4">Comments:</p>
+  useEffect(() => {
+    setCommenting(false);
+  }, [post]);
 
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
-            </div>
+  useEffect(() => {
+    if (post) {
+      setLoading(true);
+      commentClient
+        .get(post.id)
+        .then(res => {
+          setError(false);
+          setComments(() => res);
+        })
+        .catch(() => setError(true))
+        .finally(() => setLoading(false));
+    }
+  }, [post, updateFlag]);
 
-            <div className="message-body" data-cy="CommentBody">
-              Some comment
-            </div>
-          </article>
+  const handleCommentDelete = useCallback((commentId: number) => {
+    setComments(prevComnts =>
+      prevComnts.filter(comnt => comnt.id !== commentId),
+    );
+    commentClient.delete(commentId);
+  }, []);
 
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
+  return (
+    <div className="content" data-cy="PostDetails">
+      <div className="content" data-cy="PostDetails">
+        <div className="block">
+          <h2 data-cy="PostTitle">{`#${post?.id}: ${post?.title}`}</h2>
 
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
-            </div>
-            <div className="message-body" data-cy="CommentBody">
-              One more comment
-            </div>
-          </article>
+          <p data-cy="PostBody">{post?.body}</p>
+        </div>
 
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
+        <div className="block">
+          {loading && <Loader />}
 
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
+          {error && (
+            <div className="notification is-danger" data-cy="CommentsError">
+              Something went wrong
             </div>
+          )}
 
-            <div className="message-body" data-cy="CommentBody">
-              {'Multi\nline\ncomment'}
-            </div>
-          </article>
+          {readyToComment && comments.length > 0 && (
+            <>
+              <p className="title is-4">Comments:</p>
+              <CommentList comments={comments} onDelete={handleCommentDelete} />
+            </>
+          )}
 
-          <button
-            data-cy="WriteCommentButton"
-            type="button"
-            className="button is-link"
-          >
-            Write a comment
-          </button>
+          {readyToComment && (
+            <button
+              data-cy="WriteCommentButton"
+              type="button"
+              className="button is-link"
+              onClick={() => setCommenting(true)}
+            >
+              Write a comment
+            </button>
+          )}
         </div>
 
-        <NewCommentForm />
+        {!error && commenting && post && (
+          <NewCommentForm
+            post={post}
+            onError={setError}
+            onUpdate={setUpdateFlag}
+          />
+        )}
       </div>
     </div>
   );
diff --git a/src/components/PostItem.tsx b/src/components/PostItem.tsx
new file mode 100644
index 000000000..b13d3828a
--- /dev/null
+++ b/src/components/PostItem.tsx
@@ -0,0 +1,34 @@
+import React from 'react';
+import { Post } from '../types/Post';
+import classNames from 'classnames';
+
+type Props = {
+  post: Post;
+  isOppened: boolean;
+  onClick: (post: Post) => void;
+};
+
+export const PostItem: React.FC<Props> = ({ post, isOppened, onClick }) => {
+  const { id, title } = post;
+
+  return (
+    <tr key={id} data-cy="Post">
+      <td data-cy="PostId">{id}</td>
+
+      <td data-cy="PostTitle">{title}</td>
+
+      <td className="has-text-right is-vcentered">
+        <button
+          type="button"
+          data-cy="PostButton"
+          className={classNames('button is-link', {
+            'is-light': !isOppened,
+          })}
+          onClick={() => onClick(post)}
+        >
+          {isOppened ? 'Close' : 'Open'}
+        </button>
+      </td>
+    </tr>
+  );
+};
diff --git a/src/components/PostsList.tsx b/src/components/PostsList.tsx
index cf90f04b0..57af6f412 100644
--- a/src/components/PostsList.tsx
+++ b/src/components/PostsList.tsx
@@ -1,86 +1,48 @@
-import React from 'react';
-
-export const PostsList: React.FC = () => (
-  <div data-cy="PostsList">
-    <p className="title">Posts:</p>
-
-    <table className="table is-fullwidth is-striped is-hoverable is-narrow">
-      <thead>
-        <tr className="has-background-link-light">
-          <th>#</th>
-          <th>Title</th>
-          {/* eslint-disable-next-line jsx-a11y/control-has-associated-label */}
-          <th> </th>
-        </tr>
-      </thead>
-
-      <tbody>
-        <tr data-cy="Post">
-          <td data-cy="PostId">17</td>
-
-          <td data-cy="PostTitle">
-            fugit voluptas sed molestias voluptatem provident
-          </td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">18</td>
-
-          <td data-cy="PostTitle">
-            voluptate et itaque vero tempora molestiae
-          </td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link"
-            >
-              Close
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">19</td>
-          <td data-cy="PostTitle">adipisci placeat illum aut reiciendis qui</td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">20</td>
-          <td data-cy="PostTitle">doloribus ad provident suscipit at</td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-      </tbody>
-    </table>
-  </div>
-);
+import { Post } from '../types/Post';
+import { PostItem } from './PostItem';
+
+type Props = {
+  posts: Post[];
+  openedPost: Post | null;
+  onOpen: (post: Post | null) => void;
+};
+
+export const PostsList: React.FC<Props> = ({ posts, openedPost, onOpen }) => {
+  const handleClick = (post: Post) => {
+    if (post.id === openedPost?.id) {
+      onOpen(null);
+    } else {
+      onOpen(post);
+    }
+  };
+
+  return (
+    <div data-cy="PostsList">
+      <p className="title">Posts:</p>
+
+      <table className="table is-fullwidth is-striped is-hoverable is-narrow">
+        <thead>
+          <tr className="has-background-link-light">
+            <th>#</th>
+            <th>Title</th>
+            {}
+            <th> </th>
+          </tr>
+        </thead>
+
+        <tbody>
+          {posts.map(post => {
+            return (
+              <PostItem
+                key={post.id}
+                post={post}
+                isOppened={openedPost?.id === post.id}
+                onClick={handleClick}
+              />
+            );
+          })}
+        </tbody>
+      </table>
+    </div>
+  );
+};
diff --git a/src/components/UserSelector.tsx b/src/components/UserSelector.tsx
index c89442841..bde402bc6 100644
--- a/src/components/UserSelector.tsx
+++ b/src/components/UserSelector.tsx
@@ -1,6 +1,25 @@
-import React from 'react';
+import React, { useState } from 'react';
+import { User } from '../types/User';
+import classNames from 'classnames';
+
+type Props = {
+  users: User[];
+  selectedUser: User | null;
+  onSelect: (name: User) => void;
+};
+
+export const UserSelector: React.FC<Props> = ({
+  users,
+  selectedUser,
+  onSelect,
+}) => {
+  const [visible, setVisible] = useState(false);
+
+  const handleUserSelect = (user: User): void => {
+    setVisible(false);
+    onSelect(user);
+  };
 
-export const UserSelector: React.FC = () => {
   return (
     <div data-cy="UserSelector" className="dropdown is-active">
       <div className="dropdown-trigger">
@@ -9,8 +28,9 @@ export const UserSelector: React.FC = () => {
           className="button"
           aria-haspopup="true"
           aria-controls="dropdown-menu"
+          onClick={() => setVisible(prev => !prev)}
         >
-          <span>Choose a user</span>
+          <span>{selectedUser ? selectedUser.name : 'Choose a user'}</span>
 
           <span className="icon is-small">
             <i className="fas fa-angle-down" aria-hidden="true" />
@@ -18,25 +38,24 @@ export const UserSelector: React.FC = () => {
         </button>
       </div>
 
-      <div className="dropdown-menu" id="dropdown-menu" role="menu">
-        <div className="dropdown-content">
-          <a href="#user-1" className="dropdown-item">
-            Leanne Graham
-          </a>
-          <a href="#user-2" className="dropdown-item is-active">
-            Ervin Howell
-          </a>
-          <a href="#user-3" className="dropdown-item">
-            Clementine Bauch
-          </a>
-          <a href="#user-4" className="dropdown-item">
-            Patricia Lebsack
-          </a>
-          <a href="#user-5" className="dropdown-item">
-            Chelsey Dietrich
-          </a>
+      {visible && (
+        <div className="dropdown-menu" id="dropdown-menu" role="menu">
+          <div className="dropdown-content">
+            {users.map(user => (
+              <a
+                key={user.id}
+                href="#user-1"
+                className={classNames('dropdown-item', {
+                  'is-active': selectedUser && user.name === selectedUser.name,
+                })}
+                onClick={() => handleUserSelect(user)}
+              >
+                {user.name}
+              </a>
+            ))}
+          </div>
         </div>
-      </div>
+      )}
     </div>
   );
 };
diff --git a/src/utils/commentsClient.tsx b/src/utils/commentsClient.tsx
new file mode 100644
index 000000000..cce990190
--- /dev/null
+++ b/src/utils/commentsClient.tsx
@@ -0,0 +1,16 @@
+import { Comment } from '../types/Comment';
+import { client } from './fetchClient';
+
+export const commentClient = {
+  get(postId: number) {
+    return client.get<Comment[]>(`/comments?postId=${postId}`);
+  },
+
+  add(newComment: Omit<Comment, 'id'>) {
+    return client.post<Comment>('/comments', newComment);
+  },
+
+  delete(id: number) {
+    return client.delete(`/comments/${id}`);
+  },
+};
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.tsx
similarity index 84%
rename from src/utils/fetchClient.ts
rename to src/utils/fetchClient.tsx
index feb6915ce..5514c497b 100644
--- a/src/utils/fetchClient.ts
+++ b/src/utils/fetchClient.tsx
@@ -33,8 +33,8 @@ function request<T>(
 }
 
 export const client = {
-  get: <T>(url: string) => request<T>(url),
-  post: <T>(url: string, data: any) => request<T>(url, 'POST', data),
-  patch: <T>(url: string, data: any) => request<T>(url, 'PATCH', data),
+  get: <T,>(url: string) => request<T>(url),
+  post: <T,>(url: string, data: any) => request<T>(url, 'POST', data),
+  patch: <T,>(url: string, data: any) => request<T>(url, 'PATCH', data),
   delete: (url: string) => request(url, 'DELETE'),
 };
diff --git a/src/utils/postClient.tsx b/src/utils/postClient.tsx
new file mode 100644
index 000000000..c6952010f
--- /dev/null
+++ b/src/utils/postClient.tsx
@@ -0,0 +1,8 @@
+import { Post } from '../types/Post';
+import { client } from './fetchClient';
+
+export const postClient = {
+  get(userId: number) {
+    return client.get<Post[]>(`/posts?userId=${userId}`);
+  },
+};
diff --git a/src/utils/userClient.tsx b/src/utils/userClient.tsx
new file mode 100644
index 000000000..24eb5ea2f
--- /dev/null
+++ b/src/utils/userClient.tsx
@@ -0,0 +1,8 @@
+import { User } from '../types/User';
+import { client } from './fetchClient';
+
+export const userClient = {
+  getAll() {
+    return client.get<User[]>('/users');
+  },
+};