diff --git a/lib/orchpy/orchpy/unison.pyx b/lib/orchpy/orchpy/unison.pyx
new file mode 100644
index 000000000..1dc19135b
--- /dev/null
+++ b/lib/orchpy/orchpy/unison.pyx
@@ -0,0 +1,145 @@
+from libc.stdint cimport uint64_t, int64_t
+from libcpp cimport bool
+from libcpp.string cimport string
+import numpy as np
+
+cdef extern from "types.pb.h":
+  ctypedef enum DataType:
+    INT32
+    INT64
+    FLOAT32
+    FLOAT64
+
+  cdef cppclass Value:
+    Value()
+    void set_ref(uint64_t value)
+    uint64_t ref()
+    bool has_obj()
+    Obj* mutable_obj()
+
+  cdef cppclass Values:
+    Values()
+    int value_size()
+    Value* add_value()
+    Value* mutable_value(int index)
+
+  cdef cppclass String:
+      String()
+      void set_data(const char* val)
+      string* mutable_data()
+
+  cdef cppclass Int:
+    Int()
+    void set_data(int64_t val)
+    int64_t data()
+
+  cdef cppclass Double:
+    Double()
+    void set_data(double val)
+    double data()
+
+  cdef cppclass Obj:
+    Obj()
+    String* mutable_string_data()
+    Int* mutable_int_data()
+    Double* mutable_double_data()
+    bool has_string_data()
+    bool has_int_data()
+    bool has_double_data()
+
+cdef class PyValues:
+  cdef Values *thisptr
+  def __cinit__(self):
+    self.thisptr = new Values()
+  def __dealloc__(self):
+    del self.thisptr
+
+cdef class PyValue:
+  cdef Value *thisptr
+  def __cinit__(self):
+    self.thisptr = new Value()
+  def __dealloc__(self):
+    del self.thisptr
+
+cdef class ObjRef:
+  cdef size_t _id
+  cdef object type
+
+  def __cinit__(self, id, type):
+    self._id = id
+
+  def __init__(self, id, type):
+    self.type = type
+
+  def __richcmp__(self, other, int op):
+    if op == 2:
+      return self.get_id() == other.get_id()
+    else:
+      raise NotImplementedError("operator not implemented")
+
+  cpdef get_id(self):
+    return self._id
+
+cpdef serialize_args(args):
+  cdef Values* vals
+  cdef Value* val
+  cdef Obj* obj
+  cdef String* string_data
+  cdef Int* int_data
+  cdef Double* double_data
+  result = PyValues()
+  vals = result.thisptr
+  for arg in args:
+    val = vals[0].add_value()
+    if type(arg) == ObjRef:
+      val[0].set_ref(arg.get_id())
+    else:
+      obj = val[0].mutable_obj()
+      if type(arg) == str:
+        string_data = obj[0].mutable_string_data()
+        string_data[0].set_data(arg)
+      elif type(arg) == int or type(arg) == long:
+        int_data = obj[0].mutable_int_data()
+        int_data[0].set_data(arg)
+      elif type(arg) == float:
+        double_data = obj[0].mutable_double_data()
+        double_data[0].set_data(arg)
+  return result
+
+cpdef deserialize_args(PyValues args):
+  cdef Values* vals = args.thisptr
+  cdef Value* val
+  cdef Obj* obj
+  result = []
+  for i in range(vals[0].value_size()):
+    val = vals[0].mutable_value(i)
+    if not val.has_obj():
+      result.append(ObjRef(val.ref(), None)) # TODO: fix this
+    else:
+      obj = val[0].mutable_obj()
+      if obj[0].has_string_data():
+        result.append(obj[0].mutable_string_data()[0].mutable_data()[0])
+      elif obj[0].has_int_data():
+        result.append(obj[0].mutable_int_data()[0].data())
+      elif obj[0].has_double_data():
+        result.append(obj[0].mutable_double_data()[0].data())
+  return result
+
+cdef int numpy_dtype_to_proto(dtype):
+  if dtype == np.dtype('int32'):
+    return INT32
+  if dtype == np.dtype('int64'):
+    return INT64
+  if dtype == np.dtype('float32'):
+    return FLOAT32
+  if dtype == np.dtype('float64'):
+    return FLOAT64
+
+"""
+cdef Value* ndarray_to_proto(array):
+  result = PyValue()
+  result.shape.extend(array.shape)
+  result.data = np.getbuffer(array, 0, array.size * array.dtype.itemsize)
+  result.dtype = numpy_dtype_to_proto(array.dtype)
+  return result
+"""
diff --git a/lib/orchpy/orchpy/context.pyx b/lib/orchpy/orchpy/worker.pyx
similarity index 67%
rename from lib/orchpy/orchpy/context.pyx
rename to lib/orchpy/orchpy/worker.pyx
index cf2299dca..76ff560de 100644
--- a/lib/orchpy/orchpy/context.pyx
+++ b/lib/orchpy/orchpy/worker.pyx
@@ -1,7 +1,7 @@
 cdef extern void* orch_create_context(const char* server_addr);
 cdef extern size_t orch_remote_call(void* context, const char* name, void* args);
 
-cdef class Context:
+cdef class Worker:
   cdef void* context
 
   def __cinit__(self):
@@ -11,4 +11,9 @@ cdef class Context:
     self.context = orch_create_context(server_addr)
 
   def call(self, name):
-    orch_remote_call(self.context, name, <void*>0)
+    return orch_remote_call(self.context, name, <void*>0)
+
+global_worker = Worker()
+
+def pull(objref, worker=global_worker):
+  return 1