diff --git a/apiserver/facades/client/application/application_test.go b/apiserver/facades/client/application/application_test.go
index 5e383eacaae..f111f088398 100644
--- a/apiserver/facades/client/application/application_test.go
+++ b/apiserver/facades/client/application/application_test.go
@@ -12,6 +12,7 @@ import (
 	gomock "go.uber.org/mock/gomock"
 	gc "gopkg.in/check.v1"
 
+	"github.com/juju/juju/core/application"
 	coreassumes "github.com/juju/juju/core/assumes"
 	charmtesting "github.com/juju/juju/core/charm/testing"
 	"github.com/juju/juju/core/network"
@@ -44,7 +45,7 @@ func (s *applicationSuite) TestSetCharm(c *gc.C) {
 	s.setupAPI(c)
 	s.expectApplication(c, "foo")
 	s.expectCharm(c, "foo")
-	s.expectCharmConfig(c)
+	s.expectCharmConfig(c, 1)
 	s.expectCharmAssumes(c)
 	s.expectCharmFormatCheck(c, "foo")
 
@@ -138,7 +139,7 @@ func (s *applicationSuite) TestSetCharmEndpointBindings(c *gc.C) {
 	s.expectApplication(c, "foo")
 	s.expectSpaceName(c, "bar")
 	s.expectCharm(c, "foo")
-	s.expectCharmConfig(c)
+	s.expectCharmConfig(c, 1)
 	s.expectCharmAssumes(c)
 	s.expectCharmFormatCheck(c, "foo")
 
@@ -260,7 +261,7 @@ func (s *applicationSuite) TestSetCharmInvalidConfig(c *gc.C) {
 	s.setupAPI(c)
 	s.expectApplication(c, "foo")
 	s.expectCharm(c, "foo")
-	s.expectCharmConfig(c)
+	s.expectCharmConfig(c, 1)
 
 	err := s.api.SetCharm(context.Background(), params.ApplicationSetCharmV2{
 		ApplicationName: "foo",
@@ -292,7 +293,7 @@ func (s *applicationSuite) TestSetCharmWithoutTrust(c *gc.C) {
 	s.setupAPI(c)
 	s.expectApplication(c, "foo")
 	s.expectCharm(c, "foo")
-	s.expectCharmConfig(c)
+	s.expectCharmConfig(c, 1)
 	s.expectCharmAssumes(c)
 	s.expectCharmFormatCheck(c, "foo")
 
@@ -347,7 +348,7 @@ func (s *applicationSuite) TestSetCharmFormatDowngrade(c *gc.C) {
 	s.setupAPI(c)
 	s.expectApplication(c, "foo")
 	s.expectCharm(c, "foo")
-	s.expectCharmConfig(c)
+	s.expectCharmConfig(c, 1)
 	s.expectCharmAssumes(c)
 	s.expectCharmFormatCheckDowngrade(c, "foo")
 
@@ -375,6 +376,72 @@ func (s *applicationSuite) TestSetCharmFormatDowngrade(c *gc.C) {
 	c.Assert(err, gc.ErrorMatches, "cannot downgrade from v2 charm format to v1")
 }
 
+func (s *applicationSuite) TestDeploy(c *gc.C) {
+	defer s.setupMocks(c).Finish()
+
+	s.setupAPI(c)
+	s.expectCharm(c, "foo")
+	s.expectCharmConfig(c, 2)
+	s.expectCharmMeta("foo", 6)
+	s.expectReadSequence("foo", 1)
+	s.expectAddApplication()
+	s.expectCreateApplication("foo")
+
+	errorResults, err := s.api.Deploy(context.Background(), params.ApplicationsDeploy{
+		Applications: []params.ApplicationDeploy{
+			{
+				ApplicationName: "foo",
+				CharmURL:        "local:foo-42",
+				CharmOrigin: &params.CharmOrigin{
+					Type:   "charm",
+					Source: "local",
+					Base: params.Base{
+						Name:    "ubuntu",
+						Channel: "24.04",
+					},
+					Architecture: "amd64",
+					Revision:     ptr(42),
+					Track:        ptr("1.0"),
+					Risk:         "stable",
+				},
+			},
+		},
+	})
+	c.Assert(err, jc.ErrorIsNil)
+	c.Assert(errorResults.Results, gc.HasLen, 1)
+	c.Assert(errorResults.Results[0].Error, gc.IsNil)
+}
+
+func (s *applicationSuite) TestDeployInvalidSource(c *gc.C) {
+	defer s.setupMocks(c).Finish()
+
+	s.setupAPI(c)
+
+	errorResults, err := s.api.Deploy(context.Background(), params.ApplicationsDeploy{
+		Applications: []params.ApplicationDeploy{
+			{
+				ApplicationName: "foo",
+				CharmURL:        "bad:foo-42",
+				CharmOrigin: &params.CharmOrigin{
+					Type:   "charm",
+					Source: "bad",
+					Base: params.Base{
+						Name:    "ubuntu",
+						Channel: "24.04",
+					},
+					Architecture: "amd64",
+					Revision:     ptr(42),
+					Track:        ptr("1.0"),
+					Risk:         "stable",
+				},
+			},
+		},
+	})
+	c.Assert(err, jc.ErrorIsNil)
+	c.Assert(errorResults.Results, gc.HasLen, 1)
+	c.Assert(errorResults.Results[0].Error, gc.ErrorMatches, "\"bad\" not a valid charm origin source")
+}
+
 func (s *applicationSuite) setupMocks(c *gc.C) *gomock.Controller {
 	ctrl := s.baseSuite.setupMocks(c)
 
@@ -400,6 +467,23 @@ func (s *applicationSuite) expectApplicationNotFound(c *gc.C, name string) {
 	s.backend.EXPECT().Application(name).Return(nil, errors.NotFoundf("application %q", name))
 }
 
+func (s *applicationSuite) expectReadSequence(name string, seqResult int) {
+	s.backend.EXPECT().ReadSequence(name).Return(seqResult, nil)
+}
+
+func (s *applicationSuite) expectAddApplication() {
+	s.backend.EXPECT().AddApplication(gomock.Any(), s.objectStore).Return(s.application, nil)
+}
+
+func (s *applicationSuite) expectCreateApplication(name string) {
+	s.applicationService.EXPECT().CreateApplication(gomock.Any(),
+		name,
+		gomock.Any(),
+		gomock.Any(),
+		gomock.Any(),
+	).Return(application.ID("app-"+name), nil)
+}
+
 func (s *applicationSuite) expectSpaceName(c *gc.C, name string) {
 	s.networkService.EXPECT().SpaceByName(gomock.Any(), name).Return(&network.SpaceInfo{
 		ID: "space-1",
@@ -416,6 +500,7 @@ func (s *applicationSuite) expectCharm(c *gc.C, name string) {
 	s.applicationService.EXPECT().GetCharmID(gomock.Any(), applicationcharm.GetCharmArgs{
 		Name:     name,
 		Revision: ptr(42),
+		Source:   applicationcharm.LocalSource,
 	}).Return(id, nil)
 
 	s.applicationService.EXPECT().GetCharm(gomock.Any(), id).Return(s.charm, applicationcharm.CharmOrigin{
@@ -427,10 +512,11 @@ func (s *applicationSuite) expectCharmNotFound(c *gc.C, name string) {
 	s.applicationService.EXPECT().GetCharmID(gomock.Any(), applicationcharm.GetCharmArgs{
 		Name:     name,
 		Revision: ptr(42),
+		Source:   applicationcharm.LocalSource,
 	}).Return("", applicationerrors.CharmNotFound)
 }
 
-func (s *applicationSuite) expectCharmConfig(c *gc.C) {
+func (s *applicationSuite) expectCharmConfig(c *gc.C, times int) {
 	cfg, err := internalcharm.ReadConfig(strings.NewReader(`
 options:
     stringOption:
@@ -440,7 +526,13 @@ options:
     `))
 	c.Assert(err, jc.ErrorIsNil)
 
-	s.charm.EXPECT().Config().Return(cfg)
+	s.charm.EXPECT().Config().Return(cfg).Times(times)
+}
+
+func (s *applicationSuite) expectCharmMeta(name string, times int) {
+	s.charm.EXPECT().Meta().Return(&internalcharm.Meta{
+		Name: name,
+	}).Times(times)
 }
 
 func (s *applicationSuite) expectCharmAssumes(c *gc.C) {
diff --git a/apiserver/facades/client/application/package_test.go b/apiserver/facades/client/application/package_test.go
index db7b6d02c89..f2e4be3a323 100644
--- a/apiserver/facades/client/application/package_test.go
+++ b/apiserver/facades/client/application/package_test.go
@@ -137,6 +137,7 @@ func (s *baseSuite) newAPI(c *gc.C, modelType model.ModelType) {
 		UUID: s.modelUUID,
 		Type: modelType,
 	}
+	s.deployApplication = DeployApplication
 
 	var err error
 	s.api, err = NewAPIBase(