diff --git a/app/package.json b/app/package.json
index 57e4f5d..7a16f48 100644
--- a/app/package.json
+++ b/app/package.json
@@ -3,8 +3,8 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "dev": "tsx watch src/index.ts",
-    "start": "tsx src/index.ts",
+    "dev": "node --env-file-if-exists=.env ./node_modules/tsx/dist/cli.mjs watch src/index.ts",
+    "start": "node --env-file-if-exists=.env ./node_modules/tsx/dist/cli.mjs src/index.ts",
     "build": "tsc",
     "typecheck": "tsc --noEmit"
   },
diff --git a/app/src/cloud-ingest.ts b/app/src/cloud-ingest.ts
new file mode 100644
index 0000000..764559c
--- /dev/null
+++ b/app/src/cloud-ingest.ts
@@ -0,0 +1,25 @@
+const DEFAULT_CLOUD_INGEST_URL = 'http://localhost:3100/ingest'
+
+export const cloudIngestUrl =
+  process.env.CLOUD_INGEST_URL ?? DEFAULT_CLOUD_INGEST_URL
+
+function getHeaders(): Record<string, string> {
+  const headers: Record<string, string> = {
+    'content-type': 'application/json',
+  }
+
+  const apiKey = process.env.CLOUD_INGEST_API_KEY?.trim()
+  if (apiKey) {
+    headers['x-api-key'] = apiKey
+  }
+
+  return headers
+}
+
+export function postCloudIngest(body: unknown): Promise<Response> {
+  return fetch(cloudIngestUrl, {
+    method: 'POST',
+    headers: getHeaders(),
+    body: JSON.stringify(body),
+  })
+}
diff --git a/app/src/handlers/demo-plc.ts b/app/src/handlers/demo-plc.ts
index ea44cba..91b9fed 100644
--- a/app/src/handlers/demo-plc.ts
+++ b/app/src/handlers/demo-plc.ts
@@ -1,11 +1,10 @@
+import { postCloudIngest } from '../cloud-ingest.js'
 import { parseJson } from '../helpers/parse.js'
 import type { TopicHandler } from '../types.js'
 
 export const TOPIC = 'data/demo/plc/v1'
 
 const EDGE = 'demo'
-const postUrl =
-  process.env.CLOUD_INGEST_URL ?? 'https://demo.backend.drill.greact.ru/ingest'
 
 type DemoPlcPayload = {
   tag: string
@@ -29,13 +28,7 @@ function toMetric(payload: DemoPlcPayload, timestamp: number): DemoPlcMetric {
 }
 
 async function postMetric(metric: DemoPlcMetric): Promise<void> {
-  const response = await fetch(postUrl, {
-    method: 'POST',
-    headers: {
-      'content-type': 'application/json',
-    },
-    body: JSON.stringify(metric),
-  })
+  const response = await postCloudIngest([metric])
 
   if (!response.ok) {
     const text = await response.text()
diff --git a/app/src/handlers/edge5-modbus-v2.ts b/app/src/handlers/edge5-modbus-v2.ts
index cd69336..2167fe4 100644
--- a/app/src/handlers/edge5-modbus-v2.ts
+++ b/app/src/handlers/edge5-modbus-v2.ts
@@ -1,3 +1,4 @@
+import { postCloudIngest } from '../cloud-ingest.js'
 import { createMetricMapper, type MappedMetric } from '../mapping.js'
 import type { TopicHandler } from '../types.js'
 
@@ -9,17 +10,9 @@ const mapper = createMetricMapper({
     new URL('../mappings/edge5-modbus.json', import.meta.url),
 })
 const REGISTER_COUNT = mapper.tagCount
-const postUrl =
-  process.env.CLOUD_INGEST_URL ?? 'https://demo.backend.drill.greact.ru/ingest'
 
 function parseValues(payload: Buffer): number[] {
-  let value: unknown
-
-  try {
-    value = JSON.parse(payload.toString('utf8')) as unknown
-  } catch {
-    throw new Error(`Expected JSON number[${REGISTER_COUNT}]`)
-  }
+  const value = JSON.parse(payload.toString('utf8')) as unknown
 
   if (
     Array.isArray(value) &&
@@ -33,13 +26,7 @@ function parseValues(payload: Buffer): number[] {
 }
 
 async function postMetrics(metrics: MappedMetric[]): Promise<void> {
-  const response = await fetch(postUrl, {
-    method: 'POST',
-    headers: {
-      'content-type': 'application/json',
-    },
-    body: JSON.stringify(metrics),
-  })
+  const response = await postCloudIngest(metrics)
 
   if (!response.ok) {
     const text = await response.text()
diff --git a/app/src/handlers/edge5-modbus.ts b/app/src/handlers/edge5-modbus.ts
index 99171ba..5416393 100644
--- a/app/src/handlers/edge5-modbus.ts
+++ b/app/src/handlers/edge5-modbus.ts
@@ -1,11 +1,10 @@
+import { postCloudIngest } from '../cloud-ingest.js'
 import type { TopicHandler } from '../types.js'
 
 export const TOPIC = 'data/edge5/modbus/v1'
 
 const EDGE = 'edge5'
 const REGISTER_COUNT = 125
-const postUrl =
-  process.env.CLOUD_INGEST_URL ?? 'https://demo.backend.drill.greact.ru/ingest'
 
 type Edge5ModbusMetric = {
   edge: string
@@ -44,13 +43,7 @@ function toMetrics(values: number[], timestamp: number): Edge5ModbusMetric[] {
 }
 
 async function postMetrics(metrics: Edge5ModbusMetric[]): Promise<void> {
-  const response = await fetch(postUrl, {
-    method: 'POST',
-    headers: {
-      'content-type': 'application/json',
-    },
-    body: JSON.stringify(metrics),
-  })
+  const response = await postCloudIngest(metrics)
 
   if (!response.ok) {
     const text = await response.text()
diff --git a/docker-compose.yml b/docker-compose.yml
index fe27b92..5c503f8 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -20,6 +20,7 @@ services:
       HTTP_PORT: "80"
       WS_PORT: "9090"
       CLOUD_INGEST_URL: ${CLOUD_INGEST_URL:-https://demo.backend.drill.greact.ru/ingest}
+      CLOUD_INGEST_API_KEY: ${CLOUD_INGEST_API_KEY:-}
       EDGE5_MODBUS_V2_MAPPING_FILE: ${EDGE5_MODBUS_V2_MAPPING_FILE:-/app/src/mappings/edge5-modbus.json}
 
 volumes: