diff --git a/src/api.ml b/src/api.ml
index a81a2bbf..c537f7b0 100644
--- a/src/api.ml
+++ b/src/api.ml
@@ -767,3 +767,48 @@ module ExchangePartnerSetupRequest = struct
     |> mem "wad_fee" Amount.jsont ~enc:wad_fee
     |> finish
 end
+
+(* -- types for /keys -- *)
+
+module ExchangePartnerListEntry = struct
+  type t = {
+    partner_base_url: string;
+    partner_master_pub: EddsaPublicKey.t;
+    wad_fee: Amount.t;
+    wad_frequency: RelativeTime.t;
+    start_date: Timestamp.t;
+    end_date: Timestamp.t;
+    master_sig: WadPartnerSignaturePS.t;
+  }
+
+  let jsont =
+    let make partner_base_url partner_master_pub wad_fee wad_frequency
+        start_date end_date master_sig =
+      {
+        partner_base_url;
+        partner_master_pub;
+        wad_fee;
+        wad_frequency;
+        start_date;
+        end_date;
+        master_sig;
+      }
+    in
+    let partner_base_url v = v.partner_base_url in
+    let partner_master_pub v = v.partner_master_pub in
+    let wad_fee v = v.wad_fee in
+    let wad_frequency v = v.wad_frequency in
+    let start_date v = v.start_date in
+    let end_date v = v.end_date in
+    let master_sig v = v.master_sig in
+    let open Jsont.Object in
+    map ~kind:"ExchangePartnerListEntry" make
+    |> mem "partner_base_url" Jsont.string ~enc:partner_base_url
+    |> mem "partner_master_pub" EddsaPublicKey.jsont ~enc:partner_master_pub
+    |> mem "wad_fee" Amount.jsont ~enc:wad_fee
+    |> mem "wad_frequency" RelativeTime.jsont ~enc:wad_frequency
+    |> mem "start_date" Timestamp.jsont ~enc:start_date
+    |> mem "end_date" Timestamp.jsont ~enc:end_date
+    |> mem "master_sig" WadPartnerSignaturePS.jsont ~enc:master_sig
+    |> finish
+end
diff --git a/src/bin_signature.ml b/src/bin_signature.ml
index cbb74660..da56858c 100644
--- a/src/bin_signature.ml
+++ b/src/bin_signature.ml
@@ -517,6 +517,8 @@ end
 
 module PartnerConfigurationPS = struct
   module R = struct
+    (* TODO purpose
+       this purpose is used 2 times!? *)
     (* purpose.purpose = TALER_SIGNATURE_MASTER_PARNTER_DETAILS *)
     type r = {
       partner_pub: MasterPublicKeyP.t;
@@ -555,6 +557,54 @@ module PartnerConfigurationPS = struct
   include MK (R)
 end
 
+module WadPartnerSignaturePS = struct
+  module R = struct
+    (* purpose.purpose = TALER_SIGNATURE_MASTER_PARTNER_DETAILS *)
+    type r = {
+      h_partner_base_url: Hash_64_cstr.t;
+      master_public_key: MasterPublicKeyP.t;
+      start_date: TimeAbsoluteNBO.t;
+      end_date: TimeAbsoluteNBO.t;
+      wad_fee: AmountNBO.t;
+      wad_frequency: TimeRelativeNBO.t;
+    }
+
+    let bin =
+      let open Bin in
+      Purpose.make_bin Taler_signatures.master_partner_details
+      @@ fun _purpose ->
+      record
+        (fun
+          _purpose
+          h_partner_base_url
+          master_public_key
+          start_date
+          end_date
+          wad_fee
+          wad_frequency
+        ->
+          {
+            h_partner_base_url;
+            master_public_key;
+            start_date;
+            end_date;
+            wad_fee;
+            wad_frequency;
+          })
+      |+ Purpose.field _purpose
+      |+ field Hash_64_cstr.bin (fun t -> t.h_partner_base_url)
+      |+ field MasterPublicKeyP.bin (fun t -> t.master_public_key)
+      |+ field TimeAbsoluteNBO.bin (fun t -> t.start_date)
+      |+ field TimeAbsoluteNBO.bin (fun t -> t.end_date)
+      |+ field AmountNBO.bin (fun t -> t.wad_fee)
+      |+ field TimeRelativeNBO.bin (fun t -> t.wad_frequency)
+      |> sealr
+  end
+
+  include R
+  include MK (R)
+end
+
 (* ### BIN IMPL END ### *)
 
 module WithdrawRequestPS = struct
@@ -985,18 +1035,6 @@ module WadDataSignaturePS = struct
   }
 end
 
-module WadPartnerSignaturePS = struct
-  (* purpose.purpose = TALER_SIGNATURE_MASTER_PARTNER_DETAILS *)
-  type t = {
-    h_partner_base_url: Hash_64_cstr.t;
-    master_public_key: MasterPublicKeyP.t;
-    start_date: TimeAbsoluteNBO.t;
-    end_date: TimeAbsoluteNBO.t;
-    wad_fee: AmountNBO.t;
-    wad_frequency: TimeRelativeNBO.t;
-  }
-end
-
 module P2PFeesPS = struct
   (* purpose.purpose = TALER_SIGNATURE_P2P_FEES *)
   type t = {