diff --git a/metadata/collections.go b/metadata/collections.go
new file mode 100644
index 0000000..83ee5f5
--- /dev/null
+++ b/metadata/collections.go
@@ -0,0 +1,78 @@
+package metadata
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"mime/multipart"
+	"net/http"
+	"path/filepath"
+)
+
+type CollectionRest struct {
+	httpClient  *httpclient
+	metadataURL string
+}
+
+// NewCollectionREST creates a new Sequence Metadata client instance for REST Collections endpoints.
+func NewCollectionREST(projectAccessKey string, options ...Options) CollectionRest {
+	opts := Options{}
+	if len(options) > 0 {
+		opts = options[0]
+	}
+
+	client := &httpclient{
+		client:           opts.HTTPClient,
+		projectAccessKey: projectAccessKey,
+	}
+
+	if opts.HTTPClient == nil {
+		client.client = http.DefaultClient
+	}
+
+	if opts.JWTAuthToken != "" {
+		client.jwtAuthHeader = fmt.Sprintf("BEARER %s", opts.JWTAuthToken)
+	}
+
+	metadataServiceURL := "https://metadata.sequence.app"
+	if opts.MetadataServiceURL != "" {
+		metadataServiceURL = opts.MetadataServiceURL
+	}
+
+	return CollectionRest{
+		httpClient:  client,
+		metadataURL: metadataServiceURL,
+	}
+}
+
+func (c *CollectionRest) AssetUpload(projectID, collectionID, tokenID, assetID string, fileContent io.Reader) (*http.Response, error) {
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+
+	fileWriter, err := writer.CreateFormFile("file", filepath.Base(assetID))
+	if err != nil {
+		return nil, fmt.Errorf("create form file: %w", err)
+	}
+
+	_, err = io.Copy(fileWriter, fileContent)
+	if err != nil {
+		return nil, fmt.Errorf("copy bytes: %w", err)
+	}
+
+	writer.Close()
+
+	endpointURL := fmt.Sprintf("%s/collections/%s/%s/%s/upload/%s", c.metadataURL, projectID, collectionID, tokenID, assetID)
+	req, err := http.NewRequest(http.MethodPut, endpointURL, body)
+	if err != nil {
+		return nil, fmt.Errorf("create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+
+	resp, err := c.httpClient.client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("do: %w", err)
+	}
+
+	return resp, nil
+}