diff --git a/internal/api/collection.go b/internal/api/collection.go
new file mode 100644
index 000000000..597724981
--- /dev/null
+++ b/internal/api/collection.go
@@ -0,0 +1,13 @@
+package api
+
+import "context"
+
+func (c *Client) GetCollections(ctx context.Context, sinceTime int) ([]Collection, error) {
+	var collections []Collection
+	_, err := c.restClient.R().
+		SetContext(ctx).
+		SetQueryParam("since", string(sinceTime)).
+		SetResult(&collections).
+		Get("/collections")
+	return collections, err
+}
diff --git a/internal/api/collection_type.go b/internal/api/collection_type.go
new file mode 100644
index 000000000..344bffadf
--- /dev/null
+++ b/internal/api/collection_type.go
@@ -0,0 +1,42 @@
+package api
+
+// Collection represents a collection
+type Collection struct {
+	ID                  int64            `json:"id"`
+	Owner               CollectionUser   `json:"owner"`
+	EncryptedKey        string           `json:"encryptedKey" binding:"required"`
+	KeyDecryptionNonce  string           `json:"keyDecryptionNonce,omitempty" binding:"required"`
+	Name                string           `json:"name"`
+	EncryptedName       string           `json:"encryptedName"`
+	NameDecryptionNonce string           `json:"nameDecryptionNonce"`
+	Type                string           `json:"type" binding:"required"`
+	Sharees             []CollectionUser `json:"sharees"`
+	UpdationTime        int64            `json:"updationTime"`
+	IsDeleted           bool             `json:"isDeleted,omitempty"`
+	MagicMetadata       *MagicMetadata   `json:"magicMetadata,omitempty"`
+	PublicMagicMetadata *MagicMetadata   `json:"pubMagicMetadata,omitempty"`
+	SharedMagicMetadata *MagicMetadata   `json:"sharedMagicMetadata,omitempty"`
+}
+
+// CollectionUser represents the owner of a collection
+type CollectionUser struct {
+	ID    int64  `json:"id"`
+	Email string `json:"email"`
+	// Deprecated
+	Name string `json:"name"`
+	Role string `json:"role"`
+}
+
+type MagicMetadata struct {
+	Version int    `json:"version,omitempty" binding:"required"`
+	Count   int    `json:"count,omitempty" binding:"required"`
+	Data    string `json:"data,omitempty" binding:"required"`
+	Header  string `json:"header,omitempty" binding:"required"`
+}
+
+// CollectionFileItem represents a file in an AddFilesRequest and MoveFilesRequest
+type CollectionFileItem struct {
+	ID                 int64  `json:"id" binding:"required"`
+	EncryptedKey       string `json:"encryptedKey"  binding:"required"`
+	KeyDecryptionNonce string `json:"keyDecryptionNonce"  binding:"required"`
+}
diff --git a/internal/api/file_type.go b/internal/api/file_type.go
new file mode 100644
index 000000000..f241f8fe5
--- /dev/null
+++ b/internal/api/file_type.go
@@ -0,0 +1,31 @@
+package api
+
+// File represents an encrypted file in the system
+type File struct {
+	ID                 int64          `json:"id"`
+	OwnerID            int64          `json:"ownerID"`
+	CollectionID       int64          `json:"collectionID"`
+	CollectionOwnerID  *int64         `json:"collectionOwnerID"`
+	EncryptedKey       string         `json:"encryptedKey"`
+	KeyDecryptionNonce string         `json:"keyDecryptionNonce"`
+	File               FileAttributes `json:"file" binding:"required"`
+	Thumbnail          FileAttributes `json:"thumbnail" binding:"required"`
+	Metadata           FileAttributes `json:"metadata" binding:"required"`
+	IsDeleted          bool           `json:"isDeleted"`
+	UpdationTime       int64          `json:"updationTime"`
+	MagicMetadata      *MagicMetadata `json:"magicMetadata,omitempty"`
+	PubicMagicMetadata *MagicMetadata `json:"pubMagicMetadata,omitempty"`
+	Info               *FileInfo      `json:"info,omitempty"`
+}
+
+// FileInfo has information about storage used by the file & it's metadata(future)
+type FileInfo struct {
+	FileSize      int64 `json:"fileSize,omitempty"`
+	ThumbnailSize int64 `json:"thumbSize,omitempty"`
+}
+
+// FileAttributes represents a file item
+type FileAttributes struct {
+	EncryptedData    string `json:"encryptedData,omitempty"`
+	DecryptionHeader string `json:"decryptionHeader" binding:"required"`
+}