diff --git a/src/Cardano/Wallet/Api.hs b/src/Cardano/Wallet/Api.hs
index f5f9e628a1a..bdf410b1201 100644
--- a/src/Cardano/Wallet/Api.hs
+++ b/src/Cardano/Wallet/Api.hs
@@ -25,3 +25,9 @@ type GetWallet = "wallets"
 
 type ListWallets = "wallets"
     :> Get '[JSON] [Wallet]
+
+-- type CreateTransaction = "wallets"
+--     :> Capture "walletId" WalletId
+--     :> "transactions"
+--     :> ReqBody '[JSON] Payment
+--     :> Post '[JSON] Transaction
diff --git a/src/Cardano/Wallet/Api/Types.hs b/src/Cardano/Wallet/Api/Types.hs
index 5defa099d35..1d33fade66c 100644
--- a/src/Cardano/Wallet/Api/Types.hs
+++ b/src/Cardano/Wallet/Api/Types.hs
@@ -22,10 +22,12 @@ module Cardano.Wallet.Api.Types
     , WalletId (..)
     , WalletPassphraseInfo (..)
     , WalletState (..)
+    , Payment (..)
 
     -- * Re-Exports From Primitive Types
     , AddressPoolGap
     , WalletName (..)
+    , Passphrase
 
     -- * Polymorphic Types
     , ApiT (..)
@@ -36,8 +38,12 @@ import Prelude
 
 import Cardano.Wallet
     ( WalletName (..), mkWalletName )
+import Cardano.Wallet.AddressDerivation
+    ( Passphrase )
 import Cardano.Wallet.AddressDiscovery
     ( AddressPoolGap, getAddressPoolGap, mkAddressPoolGap )
+import Cardano.Wallet.Primitive
+    ( Address, mkAddress )
 import Data.Aeson
     ( FromJSON (..)
     , SumEncoding (..)
@@ -62,6 +68,8 @@ import Data.Time.Clock
     ( UTCTime )
 import Data.UUID.Types
     ( UUID )
+import Fmt
+    ( build, fmt )
 import GHC.Generics
     ( Generic )
 import GHC.TypeLits
@@ -222,6 +230,26 @@ walletStateOptions = taggedSumTypeOptions $ TaggedObjectOptions
     , _contentsFieldName = "progress"
     }
 
+data Payment = Payment
+    { _targets :: ![TargetOutput]
+    , _passphrase :: !(ApiT (Passphrase "encryption"))
+    } deriving (Generic, Show)
+
+data TargetOutput = TargetOutput
+    { _address :: !(ApiT Address)
+    , _amount :: !Amount
+    } deriving (Generic, Show)
+
+instance ToJSON (ApiT Address) where
+    toJSON = toJSON . fmt @T.Text . build . getApiT
+instance FromJSON (ApiT Address) where
+    parseJSON x = fmap ApiT . eitherToParser . mkAddress =<< parseJSON x
+
+instance FromJSON TargetOutput where
+    parseJSON = genericParseJSON defaultRecordTypeOptions
+instance ToJSON TargetOutput where
+    toJSON = genericToJSON defaultRecordTypeOptions
+
 {-------------------------------------------------------------------------------
                               Polymorphic Types
 -------------------------------------------------------------------------------}
diff --git a/src/Cardano/Wallet/Primitive.hs b/src/Cardano/Wallet/Primitive.hs
index c0b468e8fb9..f78123143df 100644
--- a/src/Cardano/Wallet/Primitive.hs
+++ b/src/Cardano/Wallet/Primitive.hs
@@ -34,6 +34,7 @@ module Cardano.Wallet.Primitive
 
     -- * Address
     , Address (..)
+    , mkAddress
     , IsOurs(..)
 
     -- * Coin
@@ -71,7 +72,7 @@ import Data.ByteArray.Encoding
 import Data.ByteString
     ( ByteString )
 import Data.ByteString.Base58
-    ( bitcoinAlphabet, encodeBase58 )
+    ( bitcoinAlphabet, decodeBase58, encodeBase58 )
 import Data.Map.Strict
     ( Map )
 import Data.Set
@@ -96,6 +97,7 @@ import GHC.TypeLits
 
 import qualified Data.Map.Strict as Map
 import qualified Data.Set as Set
+import qualified Data.Text as T
 import qualified Data.Text.Encoding as T
 
 -- * Block
@@ -221,6 +223,15 @@ newtype Address = Address
 
 instance NFData Address
 
+data AddressError
+    = AddressDecodeError T.Text
+    deriving (Show)
+
+mkAddress :: T.Text -> Either AddressError Address
+mkAddress addr = case decodeBase58 bitcoinAlphabet $ T.encodeUtf8 addr of
+    Nothing -> Left $ AddressDecodeError addr
+    Just a -> Right $ Address a
+
 instance Buildable Address where
     build = build . T.decodeUtf8 . encodeBase58 bitcoinAlphabet . getAddress