diff --git a/cmd/signer/README.md b/cmd/signer/README.md
index c9a2de36aa..65a71e3472 100644
--- a/cmd/signer/README.md
+++ b/cmd/signer/README.md
@@ -89,6 +89,15 @@ invoking methods with the following info:
   * [x] Address of API (http/ipc)
   * [ ] List of known accounts
 
+* [ ] `account_signRawTransaction`
+* [ ] `account_bulkSignTransactions([] transactions)` should
+   * only exist if enabled via config/flag
+   * only allow non-data-sending transactions
+   * all txs must use the same `from`-account
+   * let the user confirm, showing
+      * the total amount
+      * the number of unique recipients
+
 
 * Geth todos
     - The signer should pass the `Origin` header as call-info to the UI. As of right now, the way that info about the request is
@@ -115,7 +124,7 @@ put together is a bit of a hack into the http server. This could probably be gre
 
 ### External API
 
-The signer listens to HTTP requests on `rpcaddr`:`rpcport`. The messages are
+The signer listens to HTTP requests on `rpcaddr`:`rpcport`, with the same JSONRPC standard as Geth. The messages are
 expected to be JSON [jsonrpc 2.0 standard](http://www.jsonrpc.org/specification).
 
 Some of these call can require user interaction. Clients must be aware that responses
@@ -172,7 +181,7 @@ None
   - url [string]: location of the keyfile
   
 #### Sample call
-```
+```json
 {
   "id": 0,
   "jsonrpc": "2.0",
@@ -206,7 +215,7 @@ None
      - account.url [string]: location of the account
   
 #### Sample call
-```
+```json
 {
   "id": 1,
   "jsonrpc": "2.0",
@@ -253,7 +262,7 @@ None
   - signed transaction in RLP encoded form [data]
   
 #### Sample call
-```
+```json
 {
   "id": 2,
   "jsonrpc": "2.0",
@@ -270,7 +279,10 @@ None
     }
   ]
 }
+```
+Response
 
+```json
 {
   "jsonrpc": "2.0",
   "id": 67,
@@ -283,7 +295,7 @@ None
 #### Sample call with ABI-data
 
 
-```
+```json
 {
   "jsonrpc": "2.0",
   "method": "account_signTransaction",
@@ -301,7 +313,10 @@ None
   ],
   "id": 67
 }
+```
+Response
 
+```json
 {
   "jsonrpc": "2.0",
   "id": 67,
@@ -344,7 +359,7 @@ Bash example:
   - calculated signature [data]
   
 #### Sample call
-```
+```json
 {
   "id": 3,
   "jsonrpc": "2.0",
@@ -354,7 +369,10 @@ Bash example:
     "0xaabbccdd"
   ]
 }
+```
+Response
 
+```json
 {
   "id": 3,
   "jsonrpc": "2.0",
@@ -375,7 +393,7 @@ Bash example:
   - derived account [address]
   
 #### Sample call
-```
+```json
 {
   "id": 4,
   "jsonrpc": "2.0",
@@ -385,7 +403,10 @@ Bash example:
     "0x5b6693f153b48ec1c706ba4169960386dbaa6903e249cc79a8e6ddc434451d417e1e57327872c7f538beeb323c300afa9999a3d4a5de6caf3be0d5ef832b67ef1c"
   ]
 }
+```
+Response
 
+```json
 {
   "id": 4,
   "jsonrpc": "2.0",
@@ -410,7 +431,7 @@ Bash example:
      - key.url [string]: key URL
   
 #### Sample call
-```
+```json
 {
   "id": 6,
   "jsonrpc": "2.0",
@@ -439,6 +460,10 @@ Bash example:
     },
   ]
 }
+```
+Response
+
+```json
 {
   "id": 6,
   "jsonrpc": "2.0",
@@ -464,7 +489,7 @@ Bash example:
   more information
   
 #### Sample call
-```
+```json
 {
   "id": 5,
   "jsonrpc": "2.0",
@@ -473,6 +498,10 @@ Bash example:
     "0xc7412fc59930fd90099c917a50e5f11d0934b2f5"
   ]
 }
+```
+Response
+
+```json
 {
   "id": 5,
   "jsonrpc": "2.0",
@@ -506,7 +535,6 @@ Bash example:
 
 These methods needs to be implemented by a UI listener.
 
-
 By starting the signer with the switch `--stdio-ui-test`, the signer will invoke all known methods, and expect the UI to respond with
 denials. This can be used during development to ensure that the API is (at least somewhat) correctly implemented.
 See `pythonsigner`, which can be invoked via `python3 pythonsigner.py test` to perform the 'denial-handshake-test'.
@@ -515,6 +543,10 @@ All methods in this API uses object-based parameters, so that there can be no mi
 
 See the [ui api changelog](intapi_changelog.md) for information about changes to this API.
 
+OBS! A slight deviation from `json` standard is in place: every request and response should be confined to a single line.
+Whereas the `json` specification allows for linebreaks, linebreaks __should not__ be used in this communication channel, to make
+things simpler for both parties.
+
 ### ApproveTx
 
 Invoked when there's a transaction for approval.
diff --git a/cmd/signer/core/abihelper.go b/cmd/signer/core/abihelper.go
index f60d9fc47b..6f01ac69d3 100644
--- a/cmd/signer/core/abihelper.go
+++ b/cmd/signer/core/abihelper.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
diff --git a/cmd/signer/core/abihelper_test.go b/cmd/signer/core/abihelper_test.go
index a59f53b902..b3ebf009a4 100644
--- a/cmd/signer/core/abihelper_test.go
+++ b/cmd/signer/core/abihelper_test.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
diff --git a/cmd/signer/core/api.go b/cmd/signer/core/api.go
index eaa0b60f2f..9effe2c682 100644
--- a/cmd/signer/core/api.go
+++ b/cmd/signer/core/api.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
diff --git a/cmd/signer/core/api_test.go b/cmd/signer/core/api_test.go
index f260a89ec7..aa0833eb6e 100644
--- a/cmd/signer/core/api_test.go
+++ b/cmd/signer/core/api_test.go
@@ -1,3 +1,19 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+//
 package core
 
 import (
diff --git a/cmd/signer/core/cliui.go b/cmd/signer/core/cliui.go
index 0a727f7d67..6d68f57eb9 100644
--- a/cmd/signer/core/cliui.go
+++ b/cmd/signer/core/cliui.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
@@ -27,6 +27,7 @@ import (
 	"github.com/ethereum/go-ethereum/internal/ethapi"
 	"github.com/ethereum/go-ethereum/log"
 	"golang.org/x/crypto/ssh/terminal"
+	"github.com/davecgh/go-spew/spew"
 )
 
 type CommandlineUI struct {
@@ -233,7 +234,8 @@ func (ui *CommandlineUI) ShowInfo(message string) {
 }
 
 func (ui *CommandlineUI) OnApprovedTx(tx ethapi.SignTransactionResult) {
-	fmt.Printf("Transaction signed: %v", tx.Tx.String())
+	fmt.Printf("Transaction signed:\n ")
+	spew.Dump(tx.Tx)
 }
 
 func (ui *CommandlineUI) OnSignerStartup(info StartupInfo) {
diff --git a/cmd/signer/core/stdioui.go b/cmd/signer/core/stdioui.go
index 4ca77a79e8..be17c254e3 100644
--- a/cmd/signer/core/stdioui.go
+++ b/cmd/signer/core/stdioui.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
diff --git a/cmd/signer/core/types.go b/cmd/signer/core/types.go
index 78b1413696..1917a041e7 100644
--- a/cmd/signer/core/types.go
+++ b/cmd/signer/core/types.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
diff --git a/cmd/signer/main.go b/cmd/signer/main.go
index f73dbc46c4..5fecae1def 100644
--- a/cmd/signer/main.go
+++ b/cmd/signer/main.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
@@ -27,7 +27,6 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
-	"net"
 	"os"
 	"os/user"
 	"path/filepath"
@@ -45,6 +44,7 @@ import (
 	"github.com/ethereum/go-ethereum/node"
 	"github.com/ethereum/go-ethereum/rpc"
 	"gopkg.in/urfave/cli.v1"
+	"os/signal"
 )
 
 // EXT_API_VERSION -- see extapi_changelog.md
@@ -180,6 +180,9 @@ func init() {
 		utils.NoUSBFlag,
 		utils.RPCListenAddrFlag,
 		utils.RPCVirtualHostsFlag,
+		utils.IPCDisabledFlag,
+		utils.IPCPathFlag,
+		utils.RPCEnabledFlag,
 		rpcPortFlag,
 		signerSecretFlag,
 		dBFlag,
@@ -329,9 +332,7 @@ func signer(c *cli.Context) error {
 	log.Info("Loaded 4byte db", "signatures", db.Size(), "file", c.String("4bytedb"))
 
 	var (
-		api      core.ExternalAPI
-		listener net.Listener
-		server   = rpc.NewServer()
+		api core.ExternalAPI
 	)
 
 	configDir := c.String(configdirFlag.Name)
@@ -396,18 +397,56 @@ func signer(c *cli.Context) error {
 		log.Info("Audit logs configured", "file", logfile)
 	}
 	// register signer API with server
-	if err = server.RegisterName("account", api); err != nil {
-		utils.Fatalf("Could not register signer API: %v", err)
+	var (
+		extapiUrl = "n/a"
+		ipcApiUrl = "n/a"
+	)
+	rpcApi := []rpc.API{
+		rpc.API{
+			Namespace: "account",
+			Public:    true,
+			Service:   api,
+			Version:   "1.0"},
 	}
+	if c.Bool(utils.RPCEnabledFlag.Name) {
+
+		vhosts := splitAndTrim(c.GlobalString(utils.RPCVirtualHostsFlag.Name))
+		//!TODO
+		cors := []string{"*"}
+
+		// start http server
+		httpEndpoint := fmt.Sprintf("%s:%d", c.String(utils.RPCListenAddrFlag.Name), c.Int(rpcPortFlag.Name))
+		listener, _, err := node.StartHttpEndpoint(httpEndpoint, rpcApi, []string{"account"}, cors, vhosts)
+		if err != nil {
+			utils.Fatalf("Could not start RPC api: %v", err)
+		}
+		extapiUrl = fmt.Sprintf("http://%s", httpEndpoint)
+		log.Info("HTTP endpoint opened", "url", extapiUrl)
+
+		defer func() {
+			listener.Close()
+			log.Info("HTTP endpoint closed", "url", httpEndpoint)
+		}()
+
+	}
+	if !c.Bool(utils.IPCDisabledFlag.Name) {
+		if c.IsSet(utils.IPCPathFlag.Name) {
+			ipcApiUrl = c.String(utils.IPCPathFlag.Name)
+		} else {
+			ipcApiUrl = fmt.Sprintf("%s", filepath.Join(configDir, "signer.ipc"))
+		}
+
+		listener, _, err := node.StartIPCEndpoint(func() bool { return true }, ipcApiUrl, rpcApi)
+		if err != nil {
+			utils.Fatalf("Could not start IPC api: %v", err)
+		}
+		log.Info("IPC endpoint opened", "url", ipcApiUrl)
+		defer func() {
+			listener.Close()
+			log.Info("IPC endpoint closed", "url", ipcApiUrl)
+		}()
 
-	// start http server
-	endpoint := fmt.Sprintf("%s:%d", c.String(utils.RPCListenAddrFlag.Name), c.Int(rpcPortFlag.Name))
-	if listener, err = net.Listen("tcp", endpoint); err != nil {
-		utils.Fatalf("Could not start http listener: %v", err)
 	}
-	extapi_url := fmt.Sprintf("http://%s", endpoint)
-	log.Info("HTTP endpoint opened", "url", extapi_url)
-	cors := []string{"*"}
 
 	if c.Bool(testFlag.Name) {
 		log.Info("Performing UI test")
@@ -417,12 +456,18 @@ func signer(c *cli.Context) error {
 		Info: map[string]interface{}{
 			"extapi_version": EXT_API_VERSION,
 			"intapi_version": INT_API_VERSION,
-			"extapi_http":    extapi_url,
-			"extapi_ipc":     nil,
+			"extapi_http":    extapiUrl,
+			"extapi_ipc":     ipcApiUrl,
 		},
 	})
-	vhosts := splitAndTrim(c.GlobalString(utils.RPCVirtualHostsFlag.Name))
-	rpc.NewHTTPServer(cors, vhosts, server).Serve(listener)
+
+	abortChan := make(chan os.Signal)
+	signal.Notify(abortChan, os.Interrupt)
+
+	select {
+	case sig := <-abortChan:
+		log.Info("Exiting...", "signal", sig)
+	}
 
 	return nil
 }
diff --git a/cmd/signer/rules/deps/deps.go b/cmd/signer/rules/deps/deps.go
index a1a5417e4c..5ee00b900a 100644
--- a/cmd/signer/rules/deps/deps.go
+++ b/cmd/signer/rules/deps/deps.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of the go-ethereum library.
 //
 // The go-ethereum library is free software: you can redistribute it and/or modify
diff --git a/cmd/signer/rules/rules.go b/cmd/signer/rules/rules.go
index db78720d69..88794c9c49 100644
--- a/cmd/signer/rules/rules.go
+++ b/cmd/signer/rules/rules.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The go-ethereum Authors
+// Copyright 2018 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
diff --git a/cmd/signer/rules/rules_test.go b/cmd/signer/rules/rules_test.go
index 845718d122..71d8e658c4 100644
--- a/cmd/signer/rules/rules_test.go
+++ b/cmd/signer/rules/rules_test.go
@@ -1,3 +1,19 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+//
 package rules
 
 import (
diff --git a/cmd/signer/storage/aes_gcm_storage.go b/cmd/signer/storage/aes_gcm_storage.go
index 66817b4504..1ac3475588 100644
--- a/cmd/signer/storage/aes_gcm_storage.go
+++ b/cmd/signer/storage/aes_gcm_storage.go
@@ -1,3 +1,19 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+//
 package storage
 
 import (
diff --git a/cmd/signer/storage/aes_gcm_storage_test.go b/cmd/signer/storage/aes_gcm_storage_test.go
index e9bfa9e91d..09aa2f09ce 100644
--- a/cmd/signer/storage/aes_gcm_storage_test.go
+++ b/cmd/signer/storage/aes_gcm_storage_test.go
@@ -1,3 +1,19 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+//
 package storage
 
 import (