diff --git a/core/itch_client.gd b/core/itch_client.gd
index b67a2c5..60c8c02 100644
--- a/core/itch_client.gd
+++ b/core/itch_client.gd
@@ -184,7 +184,7 @@ func _thread_process(_delta: float) -> void:
 			var line: String = lines[i].strip_edges()
 			if line == "":
 				continue
-			var parsed: Variant = JSON.parse_string(line)
+			var parsed: Variant = _normalize_json(JSON.parse_string(line))
 			if typeof(parsed) != TYPE_DICTIONARY:
 				continue
 			var msg: Dictionary = parsed
@@ -210,7 +210,7 @@ func _thread_process(_delta: float) -> void:
 			_recv_buffer = _recv_buffer.substr(idx + 1)
 			if line.strip_edges() == "":
 				continue
-			var parsed: Variant = JSON.parse_string(line)
+			var parsed: Variant = _normalize_json(JSON.parse_string(line))
 			if typeof(parsed) != TYPE_DICTIONARY:
 				continue
 			var msg: Dictionary = parsed
@@ -261,6 +261,33 @@ func _send_line(text: String) -> void:
 	socket.put_data((text + "\n").to_utf8_buffer())
 
 
+## Godot's JSON.parse decodes every JSON number as a float (so 7670 becomes
+## 7670.0), and JSON.stringify then re-serializes it as "7670.0". butlerd's Go
+## structs use int64 for ids, and Go's encoding/json rejects "7670.0" for an
+## int64 field (RPC error -32700). Normalizing integral floats back to ints at
+## the parse boundary keeps every id (profileId, game.id, upload.id, ...)
+## typed correctly so downstream RPC params serialize without the trailing
+## ".0".
+func _normalize_json(value: Variant) -> Variant:
+	match typeof(value):
+		TYPE_DICTIONARY:
+			var out := {}
+			for key in value:
+				out[key] = _normalize_json(value[key])
+			return out
+		TYPE_ARRAY:
+			var out := []
+			for item in value:
+				out.append(_normalize_json(item))
+			return out
+		TYPE_FLOAT:
+			if is_finite(value) and value == floor(value):
+				return int(value)
+			return value
+		_:
+			return value
+
+
 ## Sends a JSON-RPC request and waits (via signal await, not a busy loop, so
 ## [method _thread_process] keeps ticking and can deliver the response) for
 ## the matching response. Mirrors the `_wait_for_command` pattern used by the
@@ -306,16 +333,15 @@ func _login_with_api_key(api_key: String) -> void:
 
 ## Returns every game the logged-in profile owns a download key for.
 ## Each item looks like: {"downloadKey": {...}, "game": {...}}
-func get_owned_games(fresh: bool = false) -> Array:
-	return await thread_group.exec(_get_owned_games.bind(fresh))
+func get_owned_games() -> Array:
+	return await thread_group.exec(_get_owned_games)
 
 
-func _get_owned_games(fresh: bool) -> Array:
+func _get_owned_games() -> Array:
 	if not is_logged_in:
 		return []
 	var res := await _rpc_call("Fetch.ProfileOwnedKeys", {
 		"profileId": profile.get("user", {}).get("id", profile.get("id", 0)),
-		"fresh": fresh,
 	})
 	if "error" in res:
 		logger.warn("Fetch.ProfileOwnedKeys failed: " + str(res["error"]))
diff --git a/core/library_itch.gd b/core/library_itch.gd
index f55ca06..a6fa8b1 100644
--- a/core/library_itch.gd
+++ b/core/library_itch.gd
@@ -84,7 +84,7 @@ func _load_library(caching_flags: int = Cache.FLAGS.LOAD | Cache.FLAGS.SAVE) ->
 		return []
 
 	logger.info("Fetching itch.io library...")
-	var owned: Array = await itch.get_owned_games(false)
+	var owned: Array = await itch.get_owned_games()
 	var caves: Array = await itch.get_caves()
 
 	var caves_by_game_id := {}