diff --git a/cmd/console/js.go b/cmd/console/js.go
index 76695cabdc..d049771b09 100644
--- a/cmd/console/js.go
+++ b/cmd/console/js.go
@@ -134,7 +134,7 @@ func (js *jsre) apiBindings(ipcpath string) {
 
 	// load only supported API's in javascript runtime
 	shortcuts := "var eth = web3.eth; "
-	for _, apiName := range apis {
+	for apiName, _ := range apis {
 		if apiName == api.Web3ApiName || apiName == api.EthApiName {
 			continue // manually mapped
 		}
@@ -194,7 +194,7 @@ func (self *jsre) exec(filename string) error {
 	return nil
 }
 
-func (self *jsre) suportedApis(ipcpath string) ([]string, error) {
+func (self *jsre) suportedApis(ipcpath string) (map[string]string, error) {
 	config := comms.IpcConfig{
 		Endpoint: ipcpath,
 	}
@@ -207,7 +207,7 @@ func (self *jsre) suportedApis(ipcpath string) ([]string, error) {
 	req := shared.Request{
 		Id:      1,
 		Jsonrpc: "2.0",
-		Method:  "support_apis",
+		Method:  "modules",
 	}
 
 	err = client.Send(req)
@@ -222,7 +222,7 @@ func (self *jsre) suportedApis(ipcpath string) ([]string, error) {
 
 	if sucRes, ok := res.(shared.SuccessResponse); ok {
 		data, _ := json.Marshal(sucRes.Result)
-		apis := make([]string, 0)
+		apis := make(map[string]string)
 		err = json.Unmarshal(data, &apis)
 		if err == nil {
 			return apis, nil
@@ -242,7 +242,11 @@ func (self *jsre) welcome(ipcpath string) {
 		+ " " + new Date(lastBlockTimestamp).toLocaleTimeString() + ")");`)
 
 	if modules, err := self.suportedApis(ipcpath); err == nil {
-		self.re.Eval(fmt.Sprintf("var modules = '%s';", strings.Join(modules, " ")))
+		modulesVersionString := ""
+		for api, version := range modules {
+			modulesVersionString += fmt.Sprintf("%s:%s ", api, version)
+		}
+		self.re.Eval(fmt.Sprintf("var modules = '%s';", modulesVersionString))
 		self.re.Eval(`console.log(" modules: " + modules);`)
 	}
 }
diff --git a/rpc/api/admin.go b/rpc/api/admin.go
index 6b89942b2a..43bc6bdd27 100644
--- a/rpc/api/admin.go
+++ b/rpc/api/admin.go
@@ -16,7 +16,7 @@ import (
 )
 
 const (
-	AdminVersion    = "1.0.0"
+	AdminApiversion = "1.0"
 	importBatchSize = 2500
 )
 
@@ -82,6 +82,10 @@ func (self *adminApi) Name() string {
 	return AdminApiName
 }
 
+func (self *adminApi) ApiVersion() string {
+	return AdminApiversion
+}
+
 func (self *adminApi) AddPeer(req *shared.Request) (interface{}, error) {
 	args := new(AddPeerArgs)
 	if err := self.codec.Decode(req.Params, &args); err != nil {
diff --git a/rpc/api/api.go b/rpc/api/api.go
index 2066479464..e431e5c1ef 100644
--- a/rpc/api/api.go
+++ b/rpc/api/api.go
@@ -32,6 +32,9 @@ type EthereumApi interface {
 	// API identifier
 	Name() string
 
+	// API version
+	ApiVersion() string
+
 	// Execute the given request and returns the response or an error
 	Execute(*shared.Request) (interface{}, error)
 
diff --git a/rpc/api/debug.go b/rpc/api/debug.go
index 2930ad870c..b193212a05 100644
--- a/rpc/api/debug.go
+++ b/rpc/api/debug.go
@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	DebugVersion = "1.0.0"
+	DebugApiVersion = "1.0"
 )
 
 var (
@@ -74,6 +74,10 @@ func (self *debugApi) Name() string {
 	return DebugApiName
 }
 
+func (self *debugApi) ApiVersion() string {
+	return DebugApiVersion
+}
+
 func (self *debugApi) PrintBlock(req *shared.Request) (interface{}, error) {
 	args := new(BlockNumArg)
 	if err := self.codec.Decode(req.Params, &args); err != nil {
diff --git a/rpc/api/eth.go b/rpc/api/eth.go
index f27f17f390..a0b9dad863 100644
--- a/rpc/api/eth.go
+++ b/rpc/api/eth.go
@@ -11,6 +11,10 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
+const (
+	EthApiVersion = "1.0"
+)
+
 // eth api provider
 // See https://github.com/ethereum/wiki/wiki/JSON-RPC
 type ethApi struct {
@@ -97,6 +101,10 @@ func (self *ethApi) Name() string {
 	return EthApiName
 }
 
+func (self *ethApi) ApiVersion() string {
+	return EthApiVersion
+}
+
 func (self *ethApi) Accounts(req *shared.Request) (interface{}, error) {
 	return self.xeth.Accounts(), nil
 }
diff --git a/rpc/api/mergedapi.go b/rpc/api/mergedapi.go
index dea8d1289a..b62477a140 100644
--- a/rpc/api/mergedapi.go
+++ b/rpc/api/mergedapi.go
@@ -1,21 +1,27 @@
 package api
 
-import "github.com/ethereum/go-ethereum/rpc/shared"
+import (
+	"github.com/ethereum/go-ethereum/rpc/shared"
+)
+
+const (
+	MergedApiVersion = "1.0"
+)
 
 // combines multiple API's
 type MergedApi struct {
-	apis    []string
+	apis    map[string]string
 	methods map[string]EthereumApi
 }
 
 // create new merged api instance
 func newMergedApi(apis ...EthereumApi) *MergedApi {
 	mergedApi := new(MergedApi)
-	mergedApi.apis = make([]string, len(apis))
+	mergedApi.apis = make(map[string]string, len(apis))
 	mergedApi.methods = make(map[string]EthereumApi)
 
-	for i, api := range apis {
-		mergedApi.apis[i] = api.Name()
+	for _, api := range apis {
+		mergedApi.apis[api.Name()] = api.ApiVersion()
 		for _, method := range api.Methods() {
 			mergedApi.methods[method] = api
 		}
@@ -47,8 +53,12 @@ func (self *MergedApi) Name() string {
 	return MergedApiName
 }
 
+func (self *MergedApi) ApiVersion() string {
+	return MergedApiVersion
+}
+
 func (self *MergedApi) handle(req *shared.Request) (interface{}, error) {
-	if req.Method == "support_apis" { // provided API's
+	if req.Method == "modules" { // provided API's
 		return self.apis, nil
 	}
 
diff --git a/rpc/api/miner.go b/rpc/api/miner.go
index 496269304b..0b5e74f528 100644
--- a/rpc/api/miner.go
+++ b/rpc/api/miner.go
@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	MinerVersion = "1.0.0"
+	MinerApiVersion = "1.0"
 )
 
 var (
@@ -69,6 +69,10 @@ func (self *minerApi) Name() string {
 	return MinerApiName
 }
 
+func (self *minerApi) ApiVersion() string {
+	return MinerApiVersion
+}
+
 func (self *minerApi) StartMiner(req *shared.Request) (interface{}, error) {
 	args := new(StartMinerArgs)
 	if err := self.codec.Decode(req.Params, &args); err != nil {
diff --git a/rpc/api/net.go b/rpc/api/net.go
index 6f5d55f12f..d6888ee4a2 100644
--- a/rpc/api/net.go
+++ b/rpc/api/net.go
@@ -7,6 +7,10 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
+const (
+	NetApiVersion = "1.0"
+)
+
 var (
 	// mapping between methods and handlers
 	netMapping = map[string]nethandler{
@@ -62,6 +66,10 @@ func (self *netApi) Name() string {
 	return NetApiName
 }
 
+func (self *netApi) ApiVersion() string {
+	return NetApiVersion
+}
+
 // Network version
 func (self *netApi) Version(req *shared.Request) (interface{}, error) {
 	return self.xeth.NetworkVersion(), nil
diff --git a/rpc/api/personal.go b/rpc/api/personal.go
index 08dc4bff55..7a6c91c821 100644
--- a/rpc/api/personal.go
+++ b/rpc/api/personal.go
@@ -10,6 +10,10 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
+const (
+	PersonalApiVersion = "1.0"
+)
+
 var (
 	// mapping between methods and handlers
 	personalMapping = map[string]personalhandler{
@@ -65,6 +69,10 @@ func (self *personalApi) Name() string {
 	return PersonalApiName
 }
 
+func (self *personalApi) ApiVersion() string {
+	return PersonalApiVersion
+}
+
 func (self *personalApi) ListAccounts(req *shared.Request) (interface{}, error) {
 	return self.xeth.Accounts(), nil
 }
diff --git a/rpc/api/shh.go b/rpc/api/shh.go
index 04c53c93ed..e83a7b22e0 100644
--- a/rpc/api/shh.go
+++ b/rpc/api/shh.go
@@ -9,6 +9,10 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
+const (
+	ShhApiVersion = "1.0"
+)
+
 var (
 	// mapping between methods and handlers
 	shhMapping = map[string]shhhandler{
@@ -71,6 +75,10 @@ func (self *shhApi) Name() string {
 	return ShhApiName
 }
 
+func (self *shhApi) ApiVersion() string {
+	return ShhApiVersion
+}
+
 func (self *shhApi) Version(req *shared.Request) (interface{}, error) {
 	w := self.xeth.Whisper()
 	if w == nil {
diff --git a/rpc/api/txpool.go b/rpc/api/txpool.go
index ebbe199b1b..64550bdafb 100644
--- a/rpc/api/txpool.go
+++ b/rpc/api/txpool.go
@@ -7,6 +7,10 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
+const (
+	TxPoolApiVersion = "1.0"
+)
+
 var (
 	// mapping between methods and handlers
 	txpoolMapping = map[string]txpoolhandler{
@@ -59,6 +63,10 @@ func (self *txPoolApi) Name() string {
 	return TxPoolApiName
 }
 
+func (self *txPoolApi) ApiVersion() string {
+	return TxPoolApiVersion
+}
+
 func (self *txPoolApi) Status(req *shared.Request) (interface{}, error) {
 	return map[string]int{
 		"pending": self.ethereum.TxPool().GetTransactions().Len(),
diff --git a/rpc/api/web3.go b/rpc/api/web3.go
index 42b0b7fd96..ed5008446d 100644
--- a/rpc/api/web3.go
+++ b/rpc/api/web3.go
@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	Web3Version = "1.0.0"
+	Web3ApiVersion = "1.0"
 )
 
 var (
@@ -63,9 +63,8 @@ func (self *web3Api) Name() string {
 	return Web3ApiName
 }
 
-// Version of the API this instance provides
-func (self *web3Api) Version() string {
-	return Web3Version
+func (self *web3Api) ApiVersion() string {
+	return Web3ApiVersion
 }
 
 // Calculates the sha3 over req.Params.Data