diff --git a/src/parser/parser.h b/src/parser/parser.h
index ef5a449..759d4fd 100644
--- a/src/parser/parser.h
+++ b/src/parser/parser.h
@@ -1,4 +1,20 @@
 #ifndef PARSER_H
 #define PARSER_H
 
+#include "utils/ast/ast.h"
+
+/* @brief Builds the AST representation of the next command to execute.
+ *
+ * @return Returns the AST representation of the next command to execute.
+ *         If there is no command left to execute, retuns an AST_END node.
+ */
+struct ast* get_ast();
+
+/* @brief Builds the AST representation of the given command string.
+ *
+ * @return Returns the AST representation of the given command string.
+ *         Returns an AST_END node if the given command is empty.
+ */
+struct ast* get_ast_str(char* command);
+
 #endif /* ! PARSER_H */