diff --git a/Dockerfile b/Dockerfile
index 9b7a005305..ffa11ffc7f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,9 +3,11 @@
 FROM golang:1.18
 
 RUN mkdir -p $GOPATH/src/github.com/percona/pmm-managed/api-tests
+RUN mkdir -p $GOPATH/src/github.com/percona/pmm-managed/api-tests-unmocked
 
-WORKDIR $GOPATH/src/github.com/percona/pmm-managed/api-tests/
+WORKDIR $GOPATH/src/github.com/percona/pmm-managed
 COPY api-tests/ $GOPATH/src/github.com/percona/pmm-managed/api-tests/
+COPY api-tests-unmocked/ $GOPATH/src/github.com/percona/pmm-managed/api-tests-unmocked/
 COPY go.mod go.sum $GOPATH/src/github.com/percona/pmm-managed/
 
 CMD make init run-race
diff --git a/api-tests-unmocked/api_poc_test.go b/api-tests-unmocked/api_poc_test.go
new file mode 100644
index 0000000000..d508335261
--- /dev/null
+++ b/api-tests-unmocked/api_poc_test.go
@@ -0,0 +1,295 @@
+// pmm-managed
+// Copyright (C) 2017 Percona LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+package apitestsunmocked
+
+import (
+	"context"
+	"crypto/tls"
+	"flag"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/go-openapi/runtime"
+	httptransport "github.com/go-openapi/runtime/client"
+	inventoryClient "github.com/percona/pmm/api/inventorypb/json/client"
+	"github.com/percona/pmm/api/inventorypb/json/client/agents"
+	"github.com/percona/pmm/api/inventorypb/json/client/services"
+	serverClient "github.com/percona/pmm/api/serverpb/json/client"
+	"github.com/percona/pmm/utils/tlsconfig"
+	"github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+var (
+	connAgent string
+	nodeID    string
+)
+
+// ErrFromNginx is an error type for nginx HTML response.
+type ErrFromNginx string
+
+// Error implements error interface.
+func (e *ErrFromNginx) Error() string {
+	return "response from nginx: " + string(*e)
+}
+
+func TestSuccessfulConnection(t *testing.T) {
+	username := "pmm-agent"
+	password := "pmm-agent-password"
+	require.True(t, establishPostgresConnection(t, username, password))
+}
+
+func TestUnsuccessfulConnection(t *testing.T) {
+	username := "invalid-pmm-agent"
+	password := "invalid-pmm-agent-password"
+	require.False(t, establishPostgresConnection(t, username, password))
+}
+
+func establishPostgresConnection(t *testing.T, username, password string) bool {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	service := addPostgreSQLService(services.AddPostgreSQLServiceBody{
+		NodeID:      nodeID,
+		Address:     "pmm-agent_postgres",
+		Port:        5432,
+		ServiceName: "Test PostgreSQL",
+	}, ctx)
+	if service == nil {
+		return false
+	}
+	defer removeService(t, service.Postgresql.ServiceID)
+
+	exporter := addPostgresExporter(agents.AddPostgresExporterBody{
+		ServiceID:  service.Postgresql.ServiceID,
+		Username:   username,
+		Password:   password,
+		PMMAgentID: connAgent,
+		CustomLabels: map[string]string{
+			"custom_label_postgres_exporter": "test_postgres_exporter",
+		},
+		SkipConnectionCheck: false,
+	}, ctx)
+	if exporter == nil {
+		return false
+	}
+
+	agentID := exporter.PostgresExporter.AgentID
+	if agentID == "" {
+		return false
+	}
+	defer removeAgent(t, agentID)
+
+	return true
+}
+
+func getBaseURL(serverURL string) (*url.URL, error) {
+	baseURL, err := url.Parse(serverURL)
+	if err != nil {
+		logrus.Warnf("Failed to parse PMM Server URL: %s.", err)
+		return nil, err
+	}
+
+	if baseURL.Host == "" || baseURL.Scheme == "" {
+		logrus.Warnf("Invalid PMM Server URL: %s", baseURL.String())
+		return nil, err
+	}
+
+	if baseURL.Path == "" {
+		baseURL.Path = "/"
+	}
+
+	logrus.Debugf("PMM Server URL: %s.", baseURL)
+	return baseURL, nil
+}
+
+func initClients(serverURL string) error {
+	url, err := getBaseURL(serverURL)
+	if err != nil {
+		return err
+	}
+
+	transport := Transport(url, true)
+	inventoryClient.Default = inventoryClient.New(transport, nil)
+
+	return nil
+}
+
+func init() {
+	var serverURL string
+
+	flag.StringVar(&serverURL, "pmm.server-url", "https://admin:admin@localhost/", "PMM Server URL [PMM_SERVER_URL].")
+	testing.Init()
+	flag.Parse()
+
+	for envVar, f := range map[string]*flag.Flag{
+		"PMM_SERVER_URL": flag.Lookup("pmm.server-url"),
+	} {
+		env, ok := os.LookupEnv(envVar)
+		if ok {
+			err := f.Value.Set(env)
+			if err != nil {
+				logrus.Fatalf("Invalid ENV variable %s: %s", envVar, env)
+			}
+		}
+	}
+
+	err := initClients(serverURL)
+	if err != nil {
+		logrus.Fatalf("Failed to initialized clients: %s", err.Error())
+	}
+
+	// do not run tests if server is not available
+	_, err = serverClient.Default.Server.Readiness(nil)
+	if err != nil {
+		panic(err)
+	}
+
+	connAgent, nodeID = getPMMAgentForDBConnection()
+	logrus.Infof("Connection agent: %v", connAgent)
+	logrus.Infof("Node ID: %v", nodeID)
+}
+
+// Transport returns configured Swagger transport for given URL.
+func Transport(baseURL *url.URL, insecureTLS bool) *httptransport.Runtime {
+	transport := httptransport.New(baseURL.Host, baseURL.Path, []string{baseURL.Scheme})
+	if u := baseURL.User; u != nil {
+		password, _ := u.Password()
+		transport.DefaultAuthentication = httptransport.BasicAuth(u.Username(), password)
+	}
+	transport.SetLogger(logrus.WithField("component", "client"))
+	transport.SetDebug(logrus.GetLevel() >= logrus.DebugLevel)
+	transport.Context = context.Background() // not Context - do not cancel the whole transport
+
+	// set error handlers for nginx responses if pmm-managed is down
+	errorConsumer := runtime.ConsumerFunc(func(reader io.Reader, data interface{}) error {
+		b, _ := ioutil.ReadAll(reader)
+		err := ErrFromNginx(string(b))
+		return &err
+	})
+	transport.Consumers = map[string]runtime.Consumer{
+		runtime.JSONMime:    runtime.JSONConsumer(),
+		runtime.HTMLMime:    errorConsumer,
+		runtime.TextMime:    errorConsumer,
+		runtime.DefaultMime: errorConsumer,
+	}
+
+	// disable HTTP/2, set TLS config
+	httpTransport := transport.Transport.(*http.Transport)
+	httpTransport.TLSNextProto = make(map[string]func(string, *tls.Conn) http.RoundTripper)
+	if baseURL.Scheme == "https" {
+		httpTransport.TLSClientConfig = tlsconfig.Get()
+		httpTransport.TLSClientConfig.ServerName = baseURL.Hostname()
+		httpTransport.TLSClientConfig.InsecureSkipVerify = insecureTLS
+	}
+
+	return transport
+}
+
+func getPMMAgentForDBConnection() (string, string) {
+	agentListResponse, err := inventoryClient.Default.Agents.ListAgents(nil)
+	if err != nil {
+		logrus.Fatalf("Failed to get list of agents: %s", err.Error())
+	}
+
+	if agentListResponse == nil {
+		logrus.Fatal("Agent response is nil")
+	}
+
+	agentCount := len(agentListResponse.Payload.PMMAgent)
+	if agentCount != 2 {
+		logrus.Fatalf("Expected only 2 PMM agents, found %d", agentCount)
+	}
+
+	for _, pmmAgent := range agentListResponse.Payload.PMMAgent {
+		if pmmAgent.AgentID == "pmm-server" {
+			continue
+		}
+
+		return pmmAgent.AgentID, pmmAgent.RunsOnNodeID
+	}
+
+	return "", ""
+}
+
+// Register Postgres service with PMM server
+func addPostgreSQLService(body services.AddPostgreSQLServiceBody, ctx context.Context) *services.AddPostgreSQLServiceOKBody {
+	params := &services.AddPostgreSQLServiceParams{
+		Body:    body,
+		Context: ctx,
+	}
+
+	res, err := inventoryClient.Default.Services.AddPostgreSQLService(params)
+	if err != nil {
+		logrus.Errorf("error: %v", err)
+		return nil
+	}
+
+	return res.Payload
+}
+
+// Register Postgres exporter with PMM server
+func addPostgresExporter(body agents.AddPostgresExporterBody, ctx context.Context) *agents.AddPostgresExporterOKBody {
+	params := agents.AddPostgresExporterParams{
+		Body:    body,
+		Context: ctx,
+	}
+
+	res, err := inventoryClient.Default.Agents.AddPostgresExporter(&params)
+	if err != nil {
+		logrus.Errorf("error: %v", err)
+		return nil
+	}
+
+	return res.Payload
+}
+
+// Deregister a service with PMM server
+func removeService(t *testing.T, serviceID string) {
+	params := &services.RemoveServiceParams{
+		Body: services.RemoveServiceBody{
+			ServiceID: serviceID,
+			Force:     true,
+		},
+		Context: context.Background(),
+	}
+
+	res, err := inventoryClient.Default.Services.RemoveService(params)
+	assert.NoError(t, err)
+	assert.NotNil(t, res)
+}
+
+// Deregister an agent with PMM server
+func removeAgent(t *testing.T, agentID string) {
+	params := &agents.RemoveAgentParams{
+		Body: agents.RemoveAgentBody{
+			AgentID: agentID,
+			Force:   true,
+		},
+		Context: context.Background(),
+	}
+
+	res, err := inventoryClient.Default.Agents.RemoveAgent(params)
+	assert.NoError(t, err)
+	assert.NotNil(t, res)
+}
diff --git a/api-tests/docker-compose.yml b/api-tests/docker-compose.yml
index f1c06af778..dd4fbdfe80 100644
--- a/api-tests/docker-compose.yml
+++ b/api-tests/docker-compose.yml
@@ -2,9 +2,25 @@
 version: '3.7'
 
 services:
+  pmm-client:
+    image: ${PMM_SERVER_IMAGE:-perconalab/pmm-client:dev-latest}
+    container_name: pmm-agent_pmm-client
+    depends_on:
+      - pmm-server
+    environment:
+      - PMM_AGENT_CONFIG_FILE=pmm-agent.yml
+      - PMM_AGENT_SERVER_USERNAME=admin
+      - PMM_AGENT_SERVER_PASSWORD=admin
+      - PMM_AGENT_SERVER_ADDRESS=pmm-server:443
+      - PMM_AGENT_SERVER_INSECURE_TLS=true
+    volumes:
+      - ./setup.sh:/setup.sh
+    entrypoint: ["/setup.sh"]
+
   pmm-server:
     image: ${PMM_SERVER_IMAGE:-perconalab/pmm-server:dev-latest}
     container_name: pmm-agent_pmm-server
+    hostname: pmm-server
     ports:
       - 127.0.0.1:80:80
       - 127.0.0.1:443:443
@@ -60,6 +76,7 @@ services:
   postgres:
     image: ${POSTGRES_IMAGE:-postgres:11}
     container_name: pmm-agent_postgres
+    hostname: pmm-agent_postgres
     command: >
       -c shared_preload_libraries=pg_stat_statements
       -c track_activity_query_size=2048
diff --git a/api-tests/setup.sh b/api-tests/setup.sh
new file mode 100755
index 0000000000..b1a9580203
--- /dev/null
+++ b/api-tests/setup.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+sleep 10
+pmm-agent setup
+pmm-agent --config-file=${PMM_AGENT_CONFIG_FILE}
\ No newline at end of file