diff --git a/src/core/CCByte_buffer.ml b/src/core/CCByte_buffer.ml
index 14795f83..c96331c4 100644
--- a/src/core/CCByte_buffer.ml
+++ b/src/core/CCByte_buffer.ml
@@ -137,3 +137,44 @@ let to_seq self =
   s 0
 
 (* TODO: unicode operators.*)
+
+let[@inline] check_bound_ self what i len =
+  if i + len > self.len then invalid_arg what
+  
+
+let get_uint8 : t -> int -> int =
+  fun self i ->
+  check_bound_ self "get_uint8" i 1;
+  Bytes.get_uint8 self.bs i
+
+let get_int8 : t -> int -> int =
+  fun self i ->
+  check_bound_ self "get_int8" i 1;
+  Bytes.get_int8 self.bs i
+
+let get_uint16_ne : t -> int -> int
+let get_uint16_be : t -> int -> int
+let get_uint16_le : t -> int -> int
+let get_int16_ne : t -> int -> int
+let get_int16_be : t -> int -> int
+let get_int16_le : t -> int -> int
+let get_int32_ne : t -> int -> int32
+let get_int32_be : t -> int -> int32
+let get_int32_le : t -> int -> int32
+let get_int64_ne : t -> int -> int64
+let get_int64_be : t -> int -> int64
+let get_int64_le : t -> int -> int64
+let set_uint8 : t -> int -> int -> unit
+let set_int8 : t -> int -> int -> unit
+let set_uint16_ne : t -> int -> int -> unit
+let set_uint16_be : t -> int -> int -> unit
+let set_uint16_le : t -> int -> int -> unit
+let set_int16_ne : t -> int -> int -> unit
+let set_int16_be : t -> int -> int -> unit
+let set_int16_le : t -> int -> int -> unit
+let set_int32_ne : t -> int -> int32 -> unit
+let set_int32_be : t -> int -> int32 -> unit
+let set_int32_le : t -> int -> int32 -> unit
+let set_int64_ne : t -> int -> int64 -> unit
+let set_int64_be : t -> int -> int64 -> unit
+let set_int64_le : t -> int -> int64 -> unit
diff --git a/src/core/CCByte_buffer.mli b/src/core/CCByte_buffer.mli
index 1bdab2b5..9f78ea03 100644
--- a/src/core/CCByte_buffer.mli
+++ b/src/core/CCByte_buffer.mli
@@ -109,3 +109,48 @@ val of_iter : char iter -> t
 val of_seq : char Seq.t -> t
 val to_iter : t -> char iter
 val to_seq : t -> char Seq.t
+
+(** {2 Endian operations} *)
+
+val get_uint8 : t -> int -> int
+val get_int8 : t -> int -> int
+val get_uint16_ne : t -> int -> int
+val get_uint16_be : t -> int -> int
+val get_uint16_le : t -> int -> int
+val get_int16_ne : t -> int -> int
+val get_int16_be : t -> int -> int
+val get_int16_le : t -> int -> int
+val get_int32_ne : t -> int -> int32
+val get_int32_be : t -> int -> int32
+val get_int32_le : t -> int -> int32
+val get_int64_ne : t -> int -> int64
+val get_int64_be : t -> int -> int64
+val get_int64_le : t -> int -> int64
+val set_uint8 : t -> int -> int -> unit
+val set_int8 : t -> int -> int -> unit
+val set_uint16_ne : t -> int -> int -> unit
+val set_uint16_be : t -> int -> int -> unit
+val set_uint16_le : t -> int -> int -> unit
+val set_int16_ne : t -> int -> int -> unit
+val set_int16_be : t -> int -> int -> unit
+val set_int16_le : t -> int -> int -> unit
+val set_int32_ne : t -> int -> int32 -> unit
+val set_int32_be : t -> int -> int32 -> unit
+val set_int32_le : t -> int -> int32 -> unit
+val set_int64_ne : t -> int -> int64 -> unit
+val set_int64_be : t -> int -> int64 -> unit
+val set_int64_le : t -> int -> int64 -> unit
+
+[@@@ifgeq 4.14]
+
+val get_utf_8_uchar : t -> int -> Uchar.utf_decode
+val set_utf_8_uchar : t -> int -> Uchar.t -> int
+val is_valid_utf_8 : t -> bool
+val get_utf_16be_uchar : t -> int -> Uchar.utf_decode
+val set_utf_16be_uchar : t -> int -> Uchar.t -> int
+val is_valid_utf_16be : t -> bool
+val get_utf_16le_uchar : t -> int -> Uchar.utf_decode
+val set_utf_16le_uchar : t -> int -> Uchar.t -> int
+val is_valid_utf_16le : t -> bool
+
+[@@@endif]