diff --git a/zig-impl/crystal/some-crystal-app/authd/libclient.cr b/zig-impl/crystal/some-crystal-app/authd/libclient.cr
index 6318549..f96503e 100644
--- a/zig-impl/crystal/some-crystal-app/authd/libclient.cr
+++ b/zig-impl/crystal/some-crystal-app/authd/libclient.cr
@@ -1,12 +1,25 @@
 require "../src/json"
+require "json"
 
 module AuthD
 	class Client < IPC
 		property key : String
+		property server_fd : Int32 = -1
 
 		def initialize
 			super
 			@key = ""
+			fd = self.connect "auth"
+			if fd.nil?
+				raise "couldn't connect to 'auth' IPC service"
+			end
+			@server_fd = fd
+		end
+
+		def read
+			slice = self.read @server_fd
+			m = IPCMessage::TypedMessage.deserialize slice
+			m.not_nil!
 		end
 
 		def get_token?(login : String, password : String) : String?
@@ -45,8 +58,14 @@ module AuthD
 			end
 		end
 
+		def send_now(msg : IPC::JSON)
+			m = IPCMessage::TypedMessage.new msg.type.to_u8, msg.to_json
+			write @server_fd, m
+		end
+
 		def send_now(type : Request::Type, payload)
-			send_now @server_fd, type.value.to_u8, payload
+			m = IPCMessage::TypedMessage.new type.value.to_u8, payload
+			write @server_fd, m
 		end
 
 		def decode_token(token)
@@ -61,7 +80,7 @@ module AuthD
 		def add_user(login : String, password : String,
 			email : String?,
 			phone : String?,
-			profile : Hash(String, JSON::Any)?) : ::AuthD::User::Public | Exception
+			profile : Hash(String, ::JSON::Any)?) : ::AuthD::User::Public | Exception
 
 			send_now Request::AddUser.new @key, login, password, email, phone, profile
 
@@ -126,7 +145,7 @@ module AuthD
 			password : String,
 			email : String?,
 			phone : String?,
-			profile : Hash(String, JSON::Any)?) : ::AuthD::User::Public?
+			profile : Hash(String, ::JSON::Any)?) : ::AuthD::User::Public?
 
 			send_now Request::Register.new login, password, email, phone, profile
 			response = AuthD.responses.parse_ipc_json read
diff --git a/zig-impl/crystal/some-crystal-app/makefile b/zig-impl/crystal/some-crystal-app/makefile
index 981f587..a58f9da 100644
--- a/zig-impl/crystal/some-crystal-app/makefile
+++ b/zig-impl/crystal/some-crystal-app/makefile
@@ -27,6 +27,12 @@ build-authd:
 run-authd:
 	LD_LIBRARY_PATH=$(LDPATH) ./bin/authd
 
+build-authc:
+	CRYSTAL_LIBRARY_PATH=$(LDPATH) shards build authc
+
+run-authc:
+	LD_LIBRARY_PATH=$(LDPATH) ./bin/authc
+
 
 run-test:
 	crystal run src/libauth.cr
diff --git a/zig-impl/crystal/some-crystal-app/shard.yml b/zig-impl/crystal/some-crystal-app/shard.yml
index 86e0ddf..3b5a23d 100644
--- a/zig-impl/crystal/some-crystal-app/shard.yml
+++ b/zig-impl/crystal/some-crystal-app/shard.yml
@@ -11,6 +11,8 @@ targets:
     main: src/pongd.cr
   authd:
     main: authd/main.cr
+  authc:
+    main: authd/authc.cr
 
 crystal: 1.7.1
 
diff --git a/zig-impl/crystal/some-crystal-app/src/high-level-bindings.cr b/zig-impl/crystal/some-crystal-app/src/high-level-bindings.cr
index 33c3606..8fa5a39 100644
--- a/zig-impl/crystal/some-crystal-app/src/high-level-bindings.cr
+++ b/zig-impl/crystal/some-crystal-app/src/high-level-bindings.cr
@@ -40,7 +40,7 @@ class IPC
 		fd
 	end
 
-	def connect(name : String) : Int
+	def connect(name : String) : Int32
 		fd = uninitialized Int32
 		if LibIPC.connect_service(@context, pointerof(fd), name, name.size) != 0
 			raise "oh noes, 'connect_service' iz brkn"
@@ -66,6 +66,13 @@ class IPC
 		self.write(fd, buffer.to_unsafe, buffer.size.to_u64)
 	end
 
+	def read(fd : Int32) : Slice(UInt8)
+		buffer : Bytes = Bytes.new 2000000
+		size = buffer.size.to_u64
+		LibIPC.read(@context, fd, buffer.to_unsafe, pointerof(size))
+		buffer[0..size]
+	end
+
 	def schedule(fd : Int32, string : String)
 		self.schedule(fd, string.to_unsafe, string.size.to_u64)
 	end
@@ -96,7 +103,7 @@ class IPC
 		end
 	end
 
-	def close_all()
+	def close
 		if LibIPC.close_all(@context) != 0
 			raise "Oh noes, 'close all' iz brkn"
 		end