diff --git a/api-reference.md b/api-reference.md
index f8ba006..a36ed46 100644
--- a/api-reference.md
+++ b/api-reference.md
@@ -20,6 +20,9 @@ Represents a document stamp.
 - `PUT` `/stamps`
     - Create and return a list of `Stamp`s.
     - Should generally not be used directly. Instead, create the `Stamps` with the `Document` or with `PUT /documents/{document_id}/stamps`
+- `GET` `/stamps`
+    - Get all `Stamp`s matching the given parameters.
+    - Supported filter parameters: `stamp_id`, `document_id`, `stamp_type`
 - `GET` `/stamps/{stamp_id}`
     - Returns a `Stamp` with the given `stamp_id`, or raises `Not Found` if no stamp exists.
 - `PATCH` `/stamps/{stamp_id}`