diff --git a/src/bin_dal_node/RPC_server.ml b/src/bin_dal_node/RPC_server.ml
index 546f048fdbaef3a53e450511b911758de0361986..9f1de7d10698d91ffe373386a0fc04900bd0b6d6 100644
--- a/src/bin_dal_node/RPC_server.ml
+++ b/src/bin_dal_node/RPC_server.ml
@@ -144,7 +144,7 @@ module Slots_handlers = struct
           ~with_proof
         |> Errors.to_option_tzresult)
 
-  let post_slot ctxt () query slot =
+  let post_slot ctxt query slot =
     call_handler2
       ctxt
       (fun store {cryptobox; shards_proofs_precomputation; proto_parameters; _}
@@ -330,6 +330,10 @@ let register_new :
     Node_context.t -> unit Tezos_rpc.Directory.t -> unit Tezos_rpc.Directory.t =
  fun ctxt directory ->
   directory
+  |> add_service
+       Tezos_rpc.Directory.register0
+       Services.post_slot
+       (Slots_handlers.post_slot ctxt)
   |> add_service
        Tezos_rpc.Directory.register0
        Services.post_commitment
diff --git a/src/lib_dal_node_services/services.ml b/src/lib_dal_node_services/services.ml
index dc119b96b5ce76d51cc24e3eae50e312a0485702..20ebdd8c40df1690577346ed63907810daae1ee4 100644
--- a/src/lib_dal_node_services/services.ml
+++ b/src/lib_dal_node_services/services.ml
@@ -56,7 +56,7 @@ let post_commitment :
 
 let post_slot :
     < meth : [`POST]
-    ; input : Cryptobox.slot
+    ; input : string
     ; output : Cryptobox.commitment * Cryptobox.commitment_proof
     ; prefix : unit
     ; params : unit
@@ -68,7 +68,7 @@ let post_slot :
        proof, then computes the correspoding shards with their proof. The \
        result of this RPC can be directly used to publish a slot header."
     ~query:Types.slot_query
-    ~input:slot_encoding
+    ~input:Data_encoding.string
     ~output:
       Data_encoding.(
         obj2
diff --git a/src/lib_dal_node_services/services.mli b/src/lib_dal_node_services/services.mli
index ec920030b14a7f8e9630507e19e19a77f6d6d77d..1518e4c5269221b85d83b97198483c9610e3b75d 100644
--- a/src/lib_dal_node_services/services.mli
+++ b/src/lib_dal_node_services/services.mli
@@ -60,7 +60,7 @@ val post_commitment :
     ([slot_size] from the Cryptobox). *)
 val post_slot :
   < meth : [`POST]
-  ; input : Cryptobox.slot
+  ; input : string
   ; output : Cryptobox.commitment * Cryptobox.commitment_proof
   ; prefix : unit
   ; params : unit