diff --git a/metaproperties.go b/metaproperties.go
new file mode 100644
index 0000000..db486d8
--- /dev/null
+++ b/metaproperties.go
@@ -0,0 +1,28 @@
+package frameproto
+
+// These constants are 'names' in name-value pairs used with HTML <meta /> elements by the frame-protocol.
+//
+// For example:
+//
+//	<meta property="fc:frame"       content="vNext" />
+//	<meta property="fc:frame:image" content="https://example.com/path/to/image.png" />
+//	<meta property="og:image"       content="https://example.com/path/to/image.png" />
+const (
+	MetaPropertyFrame                 = "fc:frame"
+	MetaPropertyFrameButton1          = "fc:frame:button:1"
+	MetaPropertyFrameButton1Action    = "fc:frame:button:1:action"
+	MetaPropertyFrameButton1Target    = "fc:frame:button:1:target"
+	MetaPropertyFrameButton2          = "fc:frame:button:2"
+	MetaPropertyFrameButton2Action    = "fc:frame:button:2:action"
+	MetaPropertyFrameButton2Target    = "fc:frame:button:2:target"
+	MetaPropertyFrameButton3          = "fc:frame:button:3"
+	MetaPropertyFrameButton3Action    = "fc:frame:button:3:action"
+	MetaPropertyFrameButton3Target    = "fc:frame:button:3:target"
+	MetaPropertyFrameButton4          = "fc:frame:button:4"
+	MetaPropertyFrameButton4Action    = "fc:frame:button:4:action"
+	MetaPropertyFrameButton4Target    = "fc:frame:button:4:target"
+	MetaPropertyFrameImage            = "fc:frame:image"
+	MetaPropertyFrameImageAspectRatio = "fc:frame:image:aspect_ratio"
+	MetaPropertyFrameInputText        = "fc:frame:input:text"
+	MetaPropertyFramePostURL          = "fc:frame:post_url"
+)