diff --git a/internal/client/repository/memory/memory_client.go b/internal/client/repository/memory/memory_client.go
new file mode 100644
index 0000000..ff06c0f
--- /dev/null
+++ b/internal/client/repository/memory/memory_client.go
@@ -0,0 +1,33 @@
+package memory
+
+import (
+	"context"
+	"sync"
+
+	"source.toby3d.me/website/oauth/internal/client"
+	"source.toby3d.me/website/oauth/internal/model"
+)
+
+type memoryClientRepository struct {
+	clients *sync.Map
+}
+
+func NewMemoryClientRepository(clients *sync.Map) client.Repository {
+	return &memoryClientRepository{
+		clients: clients,
+	}
+}
+
+func (repo *memoryClientRepository) Get(ctx context.Context, id string) (*model.Client, error) {
+	src, ok := repo.clients.Load(id)
+	if !ok {
+		return nil, nil
+	}
+
+	c, ok := src.(*model.Client)
+	if !ok {
+		return nil, nil
+	}
+
+	return c, nil
+}
diff --git a/internal/client/repository/memory/memory_client_test.go b/internal/client/repository/memory/memory_client_test.go
new file mode 100644
index 0000000..bbd084e
--- /dev/null
+++ b/internal/client/repository/memory/memory_client_test.go
@@ -0,0 +1,34 @@
+package memory_test
+
+import (
+	"context"
+	"sync"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"source.toby3d.me/website/oauth/internal/client/repository/memory"
+	"source.toby3d.me/website/oauth/internal/model"
+)
+
+func TestGet(t *testing.T) {
+	t.Parallel()
+
+	store := new(sync.Map)
+	client := &model.Client{
+		ID:   "http://127.0.0.1:2368/",
+		Name: "Example App",
+		Logo: "http://127.0.0.1:2368/logo.png",
+		URL:  "http://127.0.0.1:2368/",
+		RedirectURI: []model.URL{
+			"https://app.example.com/redirect",
+			"http://127.0.0.1:2368/redirect",
+		},
+	}
+
+	store.Store(string(client.ID), client)
+
+	result, err := memory.NewMemoryClientRepository(store).Get(context.TODO(), string(client.ID))
+	require.NoError(t, err)
+	assert.Equal(t, client, result)
+}