@@ -357,6 +357,7 @@ func (cli *DockerCli) CmdVersion(args ...string) error {

 	if dockerversion.VERSION != "" {

 		fmt.Fprintf(cli.out, "Client version: %s\n", dockerversion.VERSION)

 	}

+	fmt.Fprintf(cli.out, "Client API version: %s\n", api.APIVERSION)

 	fmt.Fprintf(cli.out, "Go version (client): %s\n", goruntime.Version())

 	if dockerversion.GITCOMMIT != "" {

 		fmt.Fprintf(cli.out, "Git commit (client): %s\n", dockerversion.GITCOMMIT)

@@ -379,6 +380,9 @@ func (cli *DockerCli) CmdVersion(args ...string) error {

 	}

 	out.Close()

 	fmt.Fprintf(cli.out, "Server version: %s\n", remoteVersion.Get("Version"))

+	if apiVersion := remoteVersion.Get("ApiVersion"); apiVersion != "" {

+		fmt.Fprintf(cli.out, "Server API version: %s\n", apiVersion)

+	}

 	fmt.Fprintf(cli.out, "Git commit (server): %s\n", remoteVersion.Get("GitCommit"))

 	fmt.Fprintf(cli.out, "Go version (server): %s\n", remoteVersion.Get("GoVersion"))

 	release := utils.GetReleaseVersion()

@@ -17,7 +17,17 @@ func TestVersionEnsureSucceeds(t *testing.T) {

 		t.Fatal("failed to execute docker version")

 	}

-	stringsToCheck := []string{"Client version:", "Go version (client):", "Git commit (client):", "Server version:", "Git commit (server):", "Go version (server):", "Last stable version:"}

+	stringsToCheck := []string{

+		"Client version:",

+		"Client API version:",

+		"Go version (client):",

+		"Git commit (client):",

+		"Server version:",

+		"Server API version:",

+		"Git commit (server):",

+		"Go version (server):",

+		"Last stable version:",

+	}

 	for _, linePrefix := range stringsToCheck {

 		if !strings.Contains(out, linePrefix) {

@@ -3,6 +3,7 @@ package server

 import (

 	"encoding/json"

 	"fmt"

+	"github.com/dotcloud/docker/api"

 	"github.com/dotcloud/docker/archive"

 	"github.com/dotcloud/docker/daemonconfig"

 	"github.com/dotcloud/docker/dockerversion"

@@ -823,6 +824,7 @@ func (srv *Server) DockerInfo(job *engine.Job) engine.Status {

 func (srv *Server) DockerVersion(job *engine.Job) engine.Status {

 	v := &engine.Env{}

 	v.Set("Version", dockerversion.VERSION)

+	v.Set("ApiVersion", api.APIVERSION)

 	v.Set("GitCommit", dockerversion.GITCOMMIT)

 	v.Set("GoVersion", goruntime.Version())

 	v.Set("Os", goruntime.GOOS)