diff --git a/.gitignore b/.gitignore
index 672457c9..dbd4866f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,3 @@
 _build
 data/secmod/*
 !data/secmod/.gitkeep
-
-
-# default output files of offline-tool
-response.json
-request.json
diff --git a/data/auditor_private_key b/data/auditor_private_key
new file mode 100644
index 00000000..82aad694
--- /dev/null
+++ b/data/auditor_private_key
@@ -0,0 +1 @@
+I��q��wǴY��gb�'R+5��Ⰳ�y�>
\ No newline at end of file
diff --git a/data/auditor_public_key b/data/auditor_public_key
new file mode 100644
index 00000000..2824b9ce
--- /dev/null
+++ b/data/auditor_public_key
@@ -0,0 +1 @@
+A17JXR3E6J4CXDPYT7S1H25PGJ3ABS26TQ38654QCX0TB59RPMF0====
diff --git a/src/crypto.ml b/src/crypto.ml
index b61979e4..c304962b 100644
--- a/src/crypto.ml
+++ b/src/crypto.ml
@@ -28,9 +28,8 @@ module EddsaPublicKey = struct
     let* pub = of_octets octets in
     Ok pub
 
-  let jsont =
-    let to_b32 t = B32.encode (to_octets t) in
-    Jsont.of_of_string ~kind:"EddsaPublicKey" of_b32 ~enc:to_b32
+  let to_b32 t = B32.encode (to_octets t)
+  let jsont = Jsont.of_of_string ~kind:"EddsaPublicKey" of_b32 ~enc:to_b32
 
   let caqti =
     Caqti_type.custom
diff --git a/src/http_keys.ml b/src/http_keys.ml
index 9c9957d7..9ba359a4 100644
--- a/src/http_keys.ml
+++ b/src/http_keys.ml
@@ -194,8 +194,9 @@ let mk_keys ~db_conn (module Sm : Secmod.S) ~last_issue_date =
   let* global_fees =
     Pg.get_global_fees db_conn ~start_date:Timestamp.epoch |> unwrap_err_caqti
   in
-  let auditors =
-    (* TODO /management/auditors + /auditors/$AUDITOR_PUB/$H_DENOM_PUB *) []
+  let* auditors =
+    (* TODO /auditors/$AUDITOR_PUB/$H_DENOM_PUB *)
+    Pg.get_auditor_keys db_conn
   in
   let extensions = None in
   let extensions_sig = None in
diff --git a/src/http_management.ml b/src/http_management.ml
index 3e3f046e..98bc2661 100644
--- a/src/http_management.ml
+++ b/src/http_management.ml
@@ -308,12 +308,14 @@ module Auditors = struct
     match last_date_opt with
     | None ->
         let+ () = Pg.insert_auditor db_conn v |> unwrap_err_caqti in
+        Logs.info (fun m -> m "enabled auditor");
         ()
     | Some last_date ->
         let cmp = Timestamp.compare last_date validity_start |> Option.get in
         if cmp > 0 then Error "more recent management auditor already present"
         else
           let+ () = Pg.update_auditor db_conn v |> unwrap_err_caqti in
+          Logs.info (fun m -> m "updated auditor");
           ()
 
   let jsont = AuditorSetupMessage.jsont
diff --git a/src/pg.ml b/src/pg.ml
index d133a757..0a6b7919 100644
--- a/src/pg.ml
+++ b/src/pg.ml
@@ -11,7 +11,9 @@
 
    transaction
 
-   should check validity of signatures got from db, for /management at least *)
+   should check validity of signatures got from db, for /management at least
+
+   clean up caqti error type *)
 (* TODO time
    fix comparison with timestamp footgun *)
 
@@ -186,28 +188,9 @@ let insert_auditor_denom_sig =
   fun (module Conn : CONN) ~auditor_pub ~h_denom_pub ~auditor_sig ->
     Conn.exec insert_auditor_denom_sig (auditor_pub, h_denom_pub, auditor_sig)
 
-let _get_auditors =
-  let get_auditors =
-    Caqti_type.(unit ->* t3 eddsa_pub string string)
-      "SELECT auditor_pub, auditor_url, auditor_name FROM auditors WHERE \
-       is_active"
-  in
-  fun (module Conn : CONN) () -> Conn.collect_list get_auditors ()
-
-let _get_auditor_denoms =
-  let get_auditor_denoms =
-    let auditor_sig = Bin_sig.ExchangeKeyValidity.caqti in
-    Caqti_type.(unit ->* t3 eddsa_pub denomination_hash auditor_sig)
-      "SELECT auditors.auditor_pub, denominations.denom_pub_hash, \
-       auditor_denom_sigs.auditor_sig FROM auditor_denom_sigs JOIN auditors \
-       USING (auditor_uuid) JOIN denominations USING (denominations_serial) \
-       WHERE auditors.is_active"
-  in
-  fun (module Conn : CONN) () -> Conn.collect_list get_auditor_denoms ()
-
-(* TODO auditors
+(* todo auditors
    maybe check that url and name are unique/same for each auditor_pub
-   do the ht logic out of pg.ml *)
+   and do the ht logic out of pg.ml? *)
 let get_auditor_keys =
   let get_auditor_keys =
     let auditor_sig = Bin_sig.ExchangeKeyValidity.caqti in
@@ -218,7 +201,7 @@ let get_auditor_keys =
        auditor_denom_sigs JOIN auditors USING (auditor_uuid) JOIN \
        denominations USING (denominations_serial) WHERE auditors.is_active"
   in
-  fun (module Conn : CONN) () ->
+  fun (module Conn : CONN) ->
     let open Syntax in
     let* l = Conn.collect_list get_auditor_keys () |> unwrap_err_caqti in
     let ht = Hashtbl.create 0xff in
diff --git a/tools/do_management.sh b/tools/do_management.sh
index ca1958a3..bb27251f 100755
--- a/tools/do_management.sh
+++ b/tools/do_management.sh
@@ -5,13 +5,21 @@ set -e
 file1="tmp_file1.json"
 file2="tmp_file2.json"
 file3="tmp_file3.json"
+file4="tmp_file4.json"
+
+auditor_pub=$(<"./data/auditor_public_key")
 
 dune exec offline -- download --output $file1
 dune exec offline -- sign --input $file1 --output $file2
 dune exec offline -- upload --input $file2 --url "/management/keys"
-dune exec offline -- global-fees --output $file3 --start_date "0.0" --end_date "99999999.9" --history_fee "EUR:0.0" --account_fee "EUR:0.0" --purse_fee "EUR:0.0" --history_expiration "9999999.0" --purse_account_limit 1 --purse_timeout "9999999.0"
-dune exec offline -- upload --input $file3 --url "/management/global-fees"
+
+dune exec offline -- enable-auditor --output $file3 --auditor_url "auditor.example.com" --auditor_name "auditor example" --auditor_pub $auditor_pub --validity_start "0.0"
+dune exec offline -- upload --input $file3 --url "/management/auditors"
+
+dune exec offline -- global-fees --output $file4 --start_date "0.0" --end_date "99999999.9" --history_fee "EUR:0.0" --account_fee "EUR:0.0" --purse_fee "EUR:0.0" --history_expiration "9999999.0" --purse_account_limit 1 --purse_timeout "9999999.0"
+dune exec offline -- upload --input $file4 --url "/management/global-fees"
 
 rm $file1
 rm $file2
 rm $file3
+rm $file4
diff --git a/tools/offline.ml b/tools/offline.ml
index cf2adb37..589685f0 100644
--- a/tools/offline.ml
+++ b/tools/offline.ml
@@ -16,6 +16,14 @@ module Arg = struct
   let amount =
     Arg.Conv.make ~docv:"amount argument" ~parser:Amount.of_string ~pp:Amount.pp
       ()
+
+  let eddsa_pub =
+    let parser s = Crypto.EddsaPublicKey.of_b32 s in
+    let pp fmt key =
+      let s = Crypto.EddsaPublicKey.to_b32 key in
+      Fmt.pf fmt "%s" s
+    in
+    Arg.Conv.make ~docv:"eddsa public key argument" ~parser ~pp ()
 end
 
 let default_master_offline_key_file = "data/master_offline_private_key"
@@ -96,13 +104,38 @@ let revoke_signkey_cmd =
   let doc = "Revoke signkey." in
   let signkey =
     let doc = "public signing key" in
-    Arg.(required & pos 0 (some string) None & info [] ~doc)
+    Arg.(required & pos 0 (some eddsa_pub) None & info [] ~doc)
   in
   Cmd.make (Cmd.info "revoke-signkey" ~doc)
   @@
   let+ output = output and+ master_key = master_key and+ signkey = signkey in
   revoke_signkey ~output ~master_key ~signkey
 
+let enable_auditor_cmd =
+  let doc = "Enable auditor." in
+  let auditor_url =
+    Arg.(required & opt (some string) None & info [ "auditor_url" ])
+  in
+  let auditor_name =
+    Arg.(required & opt (some string) None & info [ "auditor_name" ])
+  in
+  let auditor_pub =
+    Arg.(required & opt (some eddsa_pub) None & info [ "auditor_pub" ])
+  in
+  let validity_start =
+    Arg.(required & opt (some timestamp) None & info [ "validity_start" ])
+  in
+  Cmd.make (Cmd.info "enable-auditor" ~doc)
+  @@
+  let+ output = output
+  and+ master_key = master_key
+  and+ auditor_url = auditor_url
+  and+ auditor_name = auditor_name
+  and+ auditor_pub = auditor_pub
+  and+ validity_start = validity_start in
+  enable_auditor ~output ~master_key ~auditor_url ~auditor_name ~auditor_pub
+    ~validity_start
+
 let global_fees_cmd =
   let doc = "Provides global fee configuration." in
   let start_date =
@@ -159,6 +192,7 @@ let cli =
       upload_cmd;
       revoke_denom_cmd;
       revoke_signkey_cmd;
+      enable_auditor_cmd;
       global_fees_cmd;
     ]
 
diff --git a/tools/offline_impl.ml b/tools/offline_impl.ml
index c6e38015..4dcde9c9 100644
--- a/tools/offline_impl.ml
+++ b/tools/offline_impl.ml
@@ -74,11 +74,10 @@ let revoke_denom ~output ~master_key ~h_denom =
 
 let revoke_signkey ~output ~master_key ~signkey =
   let* key = read_master_key_file master_key in
-  let* exchange_pub = Crypto.EddsaPublicKey.of_b32 signkey in
   let signkey_revoke =
     let master_sig =
       let open Bin_sig.MasterSigningKeyRevocation in
-      sign_f ~f:(Crypto.EddsaSignature.sign ~key) { exchange_pub }
+      sign_f ~f:(Crypto.EddsaSignature.sign ~key) { exchange_pub= signkey }
     in
     Api.SignkeyRevocationSignature.{ master_sig }
   in
@@ -135,3 +134,24 @@ let global_fees ~output ~master_key ~start_date ~end_date ~history_fee
   let* s = Api.encode Api.GlobalFees.jsont global_fees in
   let* () = write_file output s in
   Ok ()
+
+let enable_auditor ~output ~master_key ~auditor_url ~auditor_name ~auditor_pub
+    ~validity_start =
+  let open Crypto in
+  let* key = read_master_key_file master_key in
+  let master_sig =
+    let open Bin_sig.MasterAddAuditor in
+    sign_f ~f:(EddsaSignature.sign ~key)
+      {
+        start_date= validity_start;
+        auditor_pub;
+        h_auditor_url= Bin_type.Hash_64_cstr.hash auditor_url;
+      }
+  in
+  let v =
+    Api.AuditorSetupMessage.
+      { auditor_url; auditor_name; auditor_pub; master_sig; validity_start }
+  in
+  let* s = Api.encode Api.AuditorSetupMessage.jsont v in
+  let* () = write_file output s in
+  Ok ()
