diff --git a/api/cli.go b/api/cli.go
index adcfed3..a39c90b 100644
--- a/api/cli.go
+++ b/api/cli.go
@@ -1,15 +1,10 @@
 package api
 
 import (
-	"encoding/json"
-	"errors"
-	"github.com/nats-io/nats.go"
 	"go.digitalcircle.com.br/open/httpcli"
 	"go.digitalcircle.com.br/open/replaycli-go/ipcmux"
 	"go.digitalcircle.com.br/open/replaycli-go/util"
-	"log"
 	"os"
-	"time"
 )
 
 type ApiCli struct {
@@ -35,48 +30,3 @@ func NewApiIPCCli() *ApiCli {
 	ret.cli.AddHeader("X-API-KEY", apikey)
 	return ret
 }
-
-var nc *nats.Conn
-
-func Call(s string, in interface{}, out interface{}) error {
-	if nc == nil {
-		var err error
-		apikey = os.Getenv("REPLAY_APIKEY")
-		if apikey == "" {
-			log.Printf("Connecting to NATS Server w/o TK.")
-			nc, err = nats.Connect(nats.DefaultURL)
-		} else {
-			log.Printf("Connecting to NATS Server w TK: " + apikey)
-			nc, err = nats.Connect(nats.DefaultURL, nats.Token(apikey))
-		}
-		if err != nil {
-			return err
-		}
-	}
-
-	bs, err := json.Marshal(in)
-	if err != nil {
-		return err
-	}
-
-	msg, err := nc.Request(s, bs, time.Minute)
-	if err != nil {
-		return err
-	}
-
-	err = json.Unmarshal(msg.Data, out)
-	if err != nil {
-		out = bs
-		return err
-	}
-
-	errstr := msg.Header.Get("ERR")
-	if errstr != "" {
-		return errors.New(errstr)
-	}
-
-	return nil
-}
-func Close() error {
-	return nc.Drain()
-}
diff --git a/api/nats.go b/api/nats.go
new file mode 100644
index 0000000..2a44301
--- /dev/null
+++ b/api/nats.go
@@ -0,0 +1,110 @@
+package api
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"github.com/nats-io/nats.go"
+	"log"
+	"os"
+	"time"
+)
+
+var nc *nats.Conn
+
+type CallOpts struct {
+	To int
+}
+
+func Call(s string, in interface{}, out interface{}, opts ...*CallOpts) error {
+	var err error
+	opt := &CallOpts{}
+	if opts != nil && len(opts) > 1 {
+		opt = opts[0]
+	}
+	if opt.To == 0 {
+		opt.To = 60
+	}
+	defer func() {
+		if nc != nil && err != nil {
+			err1 := nc.Publish("err", []byte(fmt.Sprintf("Error calling nats: %s: \nIN: %v\nOUT: %v", s, err.Error(), in, out)))
+			if err1 != nil {
+				log.Printf("Error calling nats: %s: \nIN: %v\nOUT: %v", s, err.Error(), in, out)
+				log.Printf("Inner error: %s", err1.Error())
+			}
+		} else if nc == nil && err != nil {
+			log.Printf("Error calling nats: %s: \nIN: %v\nOUT: %v\n(nc is nil)", s, err.Error(), in, out)
+		}
+
+	}()
+	if nc == nil {
+
+		apikey = os.Getenv("REPLAY_APIKEY")
+		if apikey == "" {
+			log.Printf("Connecting to NATS Server w/o TK.")
+			nc, err = nats.Connect(nats.DefaultURL)
+		} else {
+			log.Printf("Connecting to NATS Server w TK: " + apikey)
+			nc, err = nats.Connect(nats.DefaultURL, nats.Token(apikey))
+		}
+		if err != nil {
+			return err
+		}
+	}
+	var bs []byte
+	if in != nil {
+		bs, err = json.Marshal(in)
+		if err != nil {
+			return err
+		}
+	} else {
+		bs = []byte("{}")
+	}
+
+	msg, err := nc.Request(s, bs, time.Second+time.Duration(opt.To))
+	if err != nil {
+		return err
+	}
+	if out != nil {
+		err = json.Unmarshal(msg.Data, out)
+		if err != nil {
+			out = bs
+			return err
+		}
+	}
+
+	errstr := msg.Header.Get("ERR")
+	if errstr != "" {
+		return errors.New(errstr)
+	}
+
+	return nil
+}
+func Close() error {
+	return nc.Drain()
+}
+func Pub(s string, in interface{}) error {
+	var err error
+	defer func() {
+		if nc != nil && err != nil {
+			err1 := nc.Publish("err", []byte(fmt.Sprintf("Error calling nats: %s: \nIN: %v", s, err.Error(), in)))
+			if err1 != nil {
+				log.Printf("Error calling nats: %s: \nIN: %v", s, err.Error(), in)
+				log.Printf("Inner error: %s", err1.Error())
+			}
+		} else if nc == nil && err != nil {
+			log.Printf("Error calling nats: %s: \nIN: %v\n(nc is nil)", s, err.Error(), in)
+		}
+
+	}()
+
+	bs, err := json.Marshal(in)
+	if err != nil {
+		return err
+	}
+
+	err = nc.Publish(s, bs)
+
+	return err
+
+}
diff --git a/api/ocr/cli.go b/api/ocr/cli.go
index c02652c..f87d4a6 100644
--- a/api/ocr/cli.go
+++ b/api/ocr/cli.go
@@ -172,10 +172,10 @@ type Cli struct {
 	*api.ApiCli
 }
 
-func (c *Cli) OCR(opts *Opts) (*Alto, error) {
+func (c *Cli) OCR(opts *Opts, copts ...*api.CallOpts) (*Alto, error) {
 	res := &Alto{}
 	//err := c.HttpCli().JsonPost("/ipc/ocr/", opts, res)
-	err := api.Call("ocr.ocr", opts, &res)
+	err := api.Call("ocr.ocr", opts, &res, copts...)
 	return res, err
 }
 
diff --git a/go.mod b/go.mod
index 8d494f9..27fc58d 100644
--- a/go.mod
+++ b/go.mod
@@ -20,5 +20,6 @@ require (
 	github.com/nats-io/nkeys v0.3.0 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e // indirect
+	golang.org/x/mod v0.5.1 // indirect
 	google.golang.org/protobuf v1.27.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 594b5df..7a32689 100644
--- a/go.sum
+++ b/go.sum
@@ -42,6 +42,8 @@ go.digitalcircle.com.br/open/httpcli v0.0.0-20211031093505-ecf33aed8afb/go.mod h
 golang.org/x/crypto v0.0.0-20210314154223-e6e6c4f2bb5b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e h1:gsTQYXdTw2Gq7RBsWvlQ91b+aEQ6bXFUngBGuR8sPpI=
 golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/mod v0.5.1 h1:OJxoQ/rynoF0dcCdI7cLPktw/hR2cueqYfjm43oqK38=
+golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/sys v0.0.0-20190130150945-aca44879d564/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
diff --git a/svc/lib.go b/svc/lib.go
new file mode 100644
index 0000000..7649463
--- /dev/null
+++ b/svc/lib.go
@@ -0,0 +1,154 @@
+package svc
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"github.com/nats-io/nats.go"
+	"log"
+	"os"
+	"reflect"
+	"strings"
+	"time"
+	"unicode"
+)
+
+var nc *nats.Conn
+
+var compname string
+
+func Init(s string) error {
+	var err error
+	compname = s
+	var apikey string
+	if nc == nil {
+		apikey = os.Getenv("REPLAY_APIKEY")
+		if apikey == "" {
+			log.Printf("Connecting to NATS Server w/o TK.")
+			nc, err = nats.Connect(nats.DefaultURL, nats.Name(compname))
+		} else {
+			log.Printf("Connecting to NATS Server w TK: " + apikey)
+			nc, err = nats.Connect(nats.DefaultURL, nats.Name(compname), nats.Token(apikey))
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+func Close() error {
+	err := nc.Drain()
+	chEnd <- struct{}{}
+	return err
+}
+
+var chEnd chan struct{}
+
+func Serve() {
+	chEnd = make(chan struct{})
+	<-chEnd
+}
+
+func NormalizeName(s string) string {
+	sb := strings.Builder{}
+	for i, v := range s {
+		if unicode.IsUpper(v) && i != 0 {
+			sb.WriteString(".")
+		}
+		sb.WriteRune(unicode.ToLower(v))
+
+	}
+	return sb.String()
+}
+
+func Register(h interface{}) {
+	var err error
+	tp := reflect.TypeOf(h)
+	for i := 0; i < tp.NumMethod(); i++ {
+		mtd := tp.Method(i)
+		mtdt := mtd.Type
+		intp := mtdt.In(1)
+		isPtr := false
+		if intp.Kind() == reflect.Ptr {
+			isPtr = true
+			intp = intp.Elem()
+		}
+		mn := NormalizeName(compname) + "." + NormalizeName(mtd.Name)
+		err = nc.Publish("sub", []byte(mn))
+		if err != nil {
+			log.Printf(err.Error())
+		}
+		_, err = nc.Subscribe(mn, func(msg *nats.Msg) {
+			ni := reflect.New(intp).Interface()
+			var err error
+			if intp.Kind() == reflect.Ptr {
+				err = json.Unmarshal(msg.Data, ni)
+			} else {
+				err = json.Unmarshal(msg.Data, &ni)
+			}
+
+			if err != nil {
+				log.Printf(err.Error())
+			}
+			var rawret []reflect.Value
+			if isPtr {
+				rawret = mtd.Func.Call([]reflect.Value{reflect.ValueOf(h), reflect.ValueOf(ni)})
+			} else {
+				rawret = mtd.Func.Call([]reflect.Value{reflect.ValueOf(h), reflect.ValueOf(ni).Elem()})
+			}
+			ret := rawret[0].Interface()
+			err1 := rawret[1].Interface()
+			//if err1 != nil {
+			//    log.Printf(err1.(error).Error())
+			//}
+			var bs []byte
+			rmsg := &nats.Msg{}
+			rmsg.Data = bs
+			bs, err = json.Marshal(ret)
+			if err1 != nil {
+				rmsg.Header = nats.Header{}
+				rmsg.Header.Set("ERR", fmt.Sprintf("%#v", err1))
+			}
+			if err != nil {
+				log.Printf(err.Error())
+			}
+			rmsg.Data = bs
+			err = msg.RespondMsg(rmsg)
+			if err != nil {
+				log.Printf(err.Error())
+			}
+		})
+		if err != nil {
+			log.Printf(err.Error())
+		}
+		if err != nil {
+			nc.Publish("err", []byte(err.Error()))
+		}
+	}
+}
+
+func Nc() *nats.Conn {
+	return nc
+}
+
+func Call(s string, in interface{}, out interface{}) error {
+	bs, err := json.Marshal(in)
+	if err != nil {
+		return err
+	}
+	msg, err := nc.Request(s, bs, time.Minute)
+	if err != nil {
+		return err
+	}
+
+	err = json.Unmarshal(msg.Data, out)
+	if err != nil {
+		return err
+	}
+	errstr := msg.Header.Get("ERR")
+	if errstr != "" {
+		return errors.New(errstr)
+	}
+	return nil
+}
diff --git a/ver/lib.go b/ver/lib.go
new file mode 100644
index 0000000..d68059b
--- /dev/null
+++ b/ver/lib.go
@@ -0,0 +1,26 @@
+package ver
+
+import (
+	"golang.org/x/mod/semver"
+	"log"
+	"os"
+)
+
+func EnsureVer(v string) {
+	build := os.Getenv("BUILD_VER")
+	if build == "" {
+		log.Printf("No BUILD_VER found - skipping verification")
+		return
+	}
+	if semver.Compare(build, v) < 0 {
+		log.Printf("Replay version is %s, lower than required. Should be minimum %s - aborting", build, v)
+		os.Exit(0)
+	}
+	if semver.Major(build) != semver.Major(v) {
+		log.Printf("Replay major version is %s, different from feature requirement:  %s - aborting", build, v)
+	}
+}
+func Get() string {
+	build := os.Getenv("BUILD_VER")
+	return build
+}