diff --git a/node/node.go b/node/node.go
index e47de0fdf..d9b548091 100644
--- a/node/node.go
+++ b/node/node.go
@@ -175,6 +175,8 @@ func (n *Node) AddListener(l p2p.Listener) {
 }
 
 func (n *Node) StartRPC() ([]net.Listener, error) {
+	rpccore.SetConfig(n.config)
+
 	rpccore.SetBlockStore(n.blockStore)
 	rpccore.SetConsensusState(n.consensusState)
 	rpccore.SetConsensusReactor(n.consensusReactor)
diff --git a/rpc/core/dev.go b/rpc/core/dev.go
index 63cca800c..2b8dfb8f3 100644
--- a/rpc/core/dev.go
+++ b/rpc/core/dev.go
@@ -1,12 +1,39 @@
 package core
 
 import (
+	"fmt"
 	"os"
 	"runtime/pprof"
+	"strconv"
 
 	ctypes "github.com/tendermint/tendermint/rpc/core/types"
 )
 
+func UnsafeSetConfig(typ, key, value string) (*ctypes.ResultUnsafeSetConfig, error) {
+	switch typ {
+	case "string":
+		config.Set(key, value)
+	case "int":
+		val, err := strconv.Atoi(value)
+		if err != nil {
+			return nil, fmt.Errorf("non-integer value found. key:%s; value:%s; err:%v", key, value, err)
+		}
+		config.Set(key, val)
+	case "bool":
+		switch value {
+		case "true":
+			config.Set(key, true)
+		case "false":
+			config.Set(key, false)
+		default:
+			return nil, fmt.Errorf("bool value must be true or false. got %s", value)
+		}
+	default:
+		return nil, fmt.Errorf("Unknown type %s", typ)
+	}
+	return &ctypes.ResultUnsafeSetConfig{}, nil
+}
+
 var profFile *os.File
 
 func UnsafeStartCPUProfiler(filename string) (*ctypes.ResultUnsafeProfile, error) {
diff --git a/rpc/core/pipe.go b/rpc/core/pipe.go
index ae00d7b47..de196e813 100644
--- a/rpc/core/pipe.go
+++ b/rpc/core/pipe.go
@@ -1,7 +1,9 @@
 package core
 
 import (
+	cfg "github.com/tendermint/go-config"
 	"github.com/tendermint/go-p2p"
+
 	bc "github.com/tendermint/tendermint/blockchain"
 	"github.com/tendermint/tendermint/consensus"
 	mempl "github.com/tendermint/tendermint/mempool"
@@ -16,6 +18,12 @@ var p2pSwitch *p2p.Switch
 var privValidator *types.PrivValidator
 var genDoc *types.GenesisDoc // cache the genesis structure
 
+var config cfg.Config = nil
+
+func SetConfig(c cfg.Config) {
+	config = c
+}
+
 func SetBlockStore(bs *bc.BlockStore) {
 	blockStore = bs
 }
diff --git a/rpc/core/routes.go b/rpc/core/routes.go
index 30861b0f9..585a18cd2 100644
--- a/rpc/core/routes.go
+++ b/rpc/core/routes.go
@@ -24,6 +24,7 @@ var Routes = map[string]*rpc.RPCFunc{
 	"unconfirmed_txs":      rpc.NewRPCFunc(UnconfirmedTxsResult, ""),
 	"num_unconfirmed_txs":  rpc.NewRPCFunc(NumUnconfirmedTxsResult, ""),
 
+	"unsafe_set_config":         rpc.NewRPCFunc(UnsafeSetConfigResult, "type,key,value"),
 	"unsafe_start_cpu_profiler": rpc.NewRPCFunc(UnsafeStartCPUProfilerResult, "filename"),
 	"unsafe_stop_cpu_profiler":  rpc.NewRPCFunc(UnsafeStopCPUProfilerResult, ""),
 	"unsafe_write_heap_profile": rpc.NewRPCFunc(UnsafeWriteHeapProfileResult, "filename"),
@@ -141,6 +142,14 @@ func BroadcastTxAsyncResult(tx []byte) (ctypes.TMResult, error) {
 	}
 }
 
+func UnsafeSetConfigResult(typ, key, value string) (ctypes.TMResult, error) {
+	if r, err := UnsafeSetConfig(typ, key, value); err != nil {
+		return nil, err
+	} else {
+		return r, nil
+	}
+}
+
 func UnsafeStartCPUProfilerResult(filename string) (ctypes.TMResult, error) {
 	if r, err := UnsafeStartCPUProfiler(filename); err != nil {
 		return nil, err
diff --git a/rpc/test/client_test.go b/rpc/test/client_test.go
index 6508a8461..a5b243bea 100644
--- a/rpc/test/client_test.go
+++ b/rpc/test/client_test.go
@@ -155,3 +155,60 @@ func TestWSDoubleFire(t *testing.T) {
 		return nil
 	})
 }*/
+
+//--------------------------------------------------------------------------------
+// unsafe_set_config
+
+var stringVal = "my string"
+var intVal = 987654321
+var boolVal = true
+
+// don't change these
+var testCasesUnsafeSetConfig = [][]string{
+	[]string{"string", "key1", stringVal},
+	[]string{"int", "key2", fmt.Sprintf("%v", intVal)},
+	[]string{"bool", "key3", fmt.Sprintf("%v", boolVal)},
+}
+
+func TestURIUnsafeSetConfig(t *testing.T) {
+	for _, testCase := range testCasesUnsafeSetConfig {
+		tmResult := new(ctypes.TMResult)
+		_, err := clientURI.Call("unsafe_set_config", map[string]interface{}{
+			"type":  testCase[0],
+			"key":   testCase[1],
+			"value": testCase[2],
+		}, tmResult)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	testUnsafeSetConfig(t)
+}
+
+func TestJSONUnsafeSetConfig(t *testing.T) {
+	for _, testCase := range testCasesUnsafeSetConfig {
+		tmResult := new(ctypes.TMResult)
+		_, err := clientJSON.Call("unsafe_set_config", []interface{}{testCase[0], testCase[1], testCase[2]}, tmResult)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	testUnsafeSetConfig(t)
+}
+
+func testUnsafeSetConfig(t *testing.T) {
+	s := config.GetString("key1")
+	if s != stringVal {
+		t.Fatalf("got %v, expected %v", s, stringVal)
+	}
+
+	i := config.GetInt("key2")
+	if i != intVal {
+		t.Fatalf("got %v, expected %v", i, intVal)
+	}
+
+	b := config.GetBool("key3")
+	if b != boolVal {
+		t.Fatalf("got %v, expected %v", b, boolVal)
+	}
+}