diff --git a/docs/source/backends.rst b/docs/source/backends.rst
index 7aea55f..f6ec1f8 100644
--- a/docs/source/backends.rst
+++ b/docs/source/backends.rst
@@ -24,5 +24,5 @@ the official `Wallet RPC`_ documentation.
 API reference
 -------------
 
-.. automodule:: monero.backends
+.. automodule:: monero.backends.jsonrpc
    :members:
diff --git a/monero/backends/jsonrpc.py b/monero/backends/jsonrpc.py
index bfbe406..7cb8a9a 100644
--- a/monero/backends/jsonrpc.py
+++ b/monero/backends/jsonrpc.py
@@ -16,6 +16,14 @@ _log = logging.getLogger(__name__)
 
 
 class JSONRPCDaemon(object):
+    """
+    JSON RPC backend for Monero daemon
+
+    :param protocol: `http` or `https`
+    :param host: host name or IP
+    :param port: port number
+    :param path: path for JSON RPC requests (should not be changed)
+    """
     def __init__(self, protocol='http', host='127.0.0.1', port=18081, path='/json_rpc'):
         self.url = '{protocol}://{host}:{port}'.format(
                 protocol=protocol,
@@ -99,6 +107,16 @@ class JSONRPCDaemon(object):
 
 
 class JSONRPCWallet(object):
+    """
+    JSON RPC backend for Monero wallet (``monero-wallet-rpc``)
+
+    :param protocol: `http` or `https`
+    :param host: host name or IP
+    :param port: port number
+    :param path: path for JSON RPC requests (should not be changed)
+    :param user: username to authenticate with over RPC
+    :param password: password to authenticate with over RPC
+    """
     _master_address = None
     _addresses = None
 
diff --git a/monero/transaction.py b/monero/transaction.py
index 6bdff53..64bdecc 100644
--- a/monero/transaction.py
+++ b/monero/transaction.py
@@ -3,6 +3,13 @@ from .address import address
 from .numbers import PaymentID
 
 class Payment(object):
+    """
+    A payment base class, representing payment not associated with any
+    :class:`Account <monero.account.Account>`.
+
+    This class is not intended to be turned into objects by the user,
+    it is used by backends.
+    """
     payment_id = None
     amount = None
     timestamp = None
@@ -28,14 +35,29 @@ class Payment(object):
 
 
 class IncomingPayment(Payment):
+    """
+    An incoming payment (one that increases the balance of an
+    :class:`Account <monero.account.Account>`)
+    """
     _reprstr = "in: {} @ {} {:.12f} id={}"
 
 
 class OutgoingPayment(Payment):
+    """
+    An outgoing payment (one that decreases the balance of an
+    :class:`Account <monero.account.Account>`)
+    """
     _reprstr = "out: {} @ {} {:.12f} id={}"
 
 
 class Transaction(object):
+    """
+    A Monero transaction. Identified by `hash`, it can be a part of a block of some `height`
+    or not yet mined (`height` is `None` then).
+
+    This class is not intended to be turned into objects by the user,
+    it is used by backends.
+    """
     hash = None
     fee = None
     height = None
@@ -62,6 +84,13 @@ else:
 
 
 class PaymentManager(object):
+    """
+    A payment query manager, handling either incoming or outgoing payments of
+    an :class:`Account <monero.account.Account>`.
+
+    This class is not intended to be turned into objects by the user,
+    it is used by backends.
+    """
     account_idx = 0
     backend = None
 
@@ -76,6 +105,12 @@ class PaymentManager(object):
 
 
 class PaymentFilter(object):
+    """
+    A helper class that filters payments retrieved by the backend.
+
+    This class is not intended to be turned into objects by the user,
+    it is used by backends.
+    """
     def __init__(self, **filterparams):
         self.min_height = filterparams.pop('min_height', None)
         self.max_height = filterparams.pop('max_height', None)