diff --git a/src/api.ml b/src/api.ml
index 16675aaa..57e5d14d 100644
--- a/src/api.ml
+++ b/src/api.ml
@@ -431,3 +431,55 @@ module WireFeeSetupMessage = struct
     |> mem "wire_fee" Amount.jsont ~enc:wire_fee
     |> finish
 end
+
+module GlobalFees = struct
+  type t = {
+    start_date: Timestamp.t;
+    end_date: Timestamp.t;
+    history_fee: Amount.t;
+    account_fee: Amount.t;
+    purse_fee: Amount.t;
+    history_expiration: RelativeTime.t;
+    purse_account_limit: int;
+    purse_timeout: RelativeTime.t;
+    (* Signature of TALER_GlobalFeesPS. *)
+    master_sig: GlobalFeesPS.t;
+  }
+
+  let jsont =
+    let make start_date end_date history_fee account_fee purse_fee
+        history_expiration purse_account_limit purse_timeout master_sig =
+      {
+        start_date;
+        end_date;
+        history_fee;
+        account_fee;
+        purse_fee;
+        history_expiration;
+        purse_account_limit;
+        purse_timeout;
+        master_sig;
+      }
+    in
+    let start_date v = v.start_date in
+    let end_date v = v.end_date in
+    let history_fee v = v.history_fee in
+    let account_fee v = v.account_fee in
+    let purse_fee v = v.purse_fee in
+    let history_expiration v = v.history_expiration in
+    let purse_account_limit v = v.purse_account_limit in
+    let purse_timeout v = v.purse_timeout in
+    let master_sig v = v.master_sig in
+    let open Jsont.Object in
+    map ~kind:"GlobalFees" make
+    |> mem "start_date" Timestamp.jsont ~enc:start_date
+    |> mem "end_date" Timestamp.jsont ~enc:end_date
+    |> mem "history_fee" Amount.jsont ~enc:history_fee
+    |> mem "account_fee" Amount.jsont ~enc:account_fee
+    |> mem "purse_fee" Amount.jsont ~enc:purse_fee
+    |> mem "history_expiration" RelativeTime.jsont ~enc:history_expiration
+    |> mem "purse_account_limit" Jsont.int ~enc:purse_account_limit
+    |> mem "purse_timeout" RelativeTime.jsont ~enc:purse_timeout
+    |> mem "master_sig" GlobalFeesPS.jsont ~enc:master_sig
+    |> finish
+end
diff --git a/src/bin_signature.ml b/src/bin_signature.ml
index af6d0a3b..c5dc1738 100644
--- a/src/bin_signature.ml
+++ b/src/bin_signature.ml
@@ -292,6 +292,69 @@ module MasterDelAuditorPS = struct
   include MK (R)
 end
 
+module GlobalFeesPS = struct
+  module R = struct
+    (* purpose.purpose = TALER_SIGNATURE_MASTER_GLOBAL_FEES *)
+    type r = {
+      start_date: TimeAbsoluteNBO.t;
+      end_date: TimeAbsoluteNBO.t;
+      purse_timeout: TimeRelativeNBO.t;
+      kyc_timeout: TimeRelativeNBO.t;
+      history_expiration: TimeRelativeNBO.t;
+      history_fee: AmountNBO.t;
+      kyc_fee: AmountNBO.t;
+      account_fee: AmountNBO.t;
+      purse_fee: AmountNBO.t;
+      purse_account_limit: int32;
+    }
+
+    let bin =
+      let open Bin in
+      Purpose.make_bin Taler_signatures.master_global_fees @@ fun purpose ->
+      record
+        (fun
+          _purpose
+          start_date
+          end_date
+          purse_timeout
+          kyc_timeout
+          history_expiration
+          history_fee
+          kyc_fee
+          account_fee
+          purse_fee
+          purse_account_limit
+        ->
+          {
+            start_date;
+            end_date;
+            purse_timeout;
+            kyc_timeout;
+            history_expiration;
+            history_fee;
+            kyc_fee;
+            account_fee;
+            purse_fee;
+            purse_account_limit;
+          })
+      |+ Purpose.field purpose
+      |+ field TimeAbsoluteNBO.bin (fun t -> t.start_date)
+      |+ field TimeRelativeNBO.bin (fun t -> t.end_date)
+      |+ field TimeRelativeNBO.bin (fun t -> t.purse_timeout)
+      |+ field TimeRelativeNBO.bin (fun t -> t.kyc_timeout)
+      |+ field TimeRelativeNBO.bin (fun t -> t.history_expiration)
+      |+ field AmountNBO.bin (fun t -> t.history_fee)
+      |+ field AmountNBO.bin (fun t -> t.kyc_fee)
+      |+ field AmountNBO.bin (fun t -> t.account_fee)
+      |+ field AmountNBO.bin (fun t -> t.purse_fee)
+      |+ field beint32 (fun t -> t.purse_account_limit)
+      |> sealr
+  end
+
+  include R
+  include MK (R)
+end
+
 (* ### BIN IMPL END ### *)
 
 module WithdrawRequestPS = struct
@@ -431,22 +494,6 @@ module MasterWireFeePS = struct
   }
 end
 
-module GlobalFeesPS = struct
-  (* purpose.purpose = TALER_SIGNATURE_MASTER_GLOBAL_FEES *)
-  type t = {
-    start_date: TimeAbsoluteNBO.t;
-    end_date: TimeAbsoluteNBO.t;
-    purse_timeout: TimeRelativeNBO.t;
-    kyc_timeout: TimeRelativeNBO.t;
-    history_expiration: TimeRelativeNBO.t;
-    history_fee: AmountNBO.t;
-    kyc_fee: AmountNBO.t;
-    account_fee: AmountNBO.t;
-    purse_fee: AmountNBO.t;
-    purse_account_limit: int; (* uint32_t → int *)
-  }
-end
-
 module MasterDrainProfitPS = struct
   (* purpose.purpose = TALER_SIGNATURE_MASTER_DRAIN_PROFITS *)
   type t = {