diff --git a/apps/api/src/printTelemetry.ts b/apps/api/src/printTelemetry.ts
new file mode 100644
index 0000000..8962775
--- /dev/null
+++ b/apps/api/src/printTelemetry.ts
@@ -0,0 +1,33 @@
+export const streamFormats = ['zpl', 'pdf', 'postscript', 'pjl', 'pcl', 'zip', 'unknown'] as const
+export const failureKinds = ['capture', 'forward', 'parser'] as const
+
+export type PrintTelemetry = {
+  id: string
+  source: 'raw-proxy'
+  streamFormat: (typeof streamFormats)[number]
+  byteCount: number
+  barcodeCount: number
+  forwarded: boolean
+  failureKind: (typeof failureKinds)[number] | null
+  appVersion: string
+  capturedAt: string
+}
+
+const uuid = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i
+
+export function parsePrintTelemetry(payload: unknown): PrintTelemetry | null {
+  if (typeof payload !== 'object' || payload === null || Array.isArray(payload)) return null
+  const value = payload as Record<string, unknown>
+  const allowed = ['id', 'source', 'streamFormat', 'byteCount', 'barcodeCount', 'forwarded', 'failureKind', 'appVersion', 'capturedAt']
+  if (Object.keys(value).some((key) => !allowed.includes(key))) return null
+  if (typeof value.id !== 'string' || !uuid.test(value.id)) return null
+  if (value.source !== 'raw-proxy') return null
+  if (!streamFormats.includes(value.streamFormat as PrintTelemetry['streamFormat'])) return null
+  if (!Number.isSafeInteger(value.byteCount) || (value.byteCount as number) < 0) return null
+  if (!Number.isSafeInteger(value.barcodeCount) || (value.barcodeCount as number) < 0) return null
+  if (typeof value.forwarded !== 'boolean') return null
+  if (value.failureKind !== null && !failureKinds.includes(value.failureKind as (typeof failureKinds)[number])) return null
+  if (typeof value.appVersion !== 'string' || value.appVersion.length > 40) return null
+  if (typeof value.capturedAt !== 'string' || !Number.isFinite(Date.parse(value.capturedAt))) return null
+  return value as PrintTelemetry
+}
diff --git a/apps/api/src/server.ts b/apps/api/src/server.ts
index 25e1d51..ecc1360 100644
--- a/apps/api/src/server.ts
+++ b/apps/api/src/server.ts
@@ -278,6 +278,20 @@ app.post('/api/v1/sync', requireAccess('operator'), async (req, res) => {
   }
 })
 
+app.get('/api/v1/print-captures', requireAccess('operator'), async (req, res) => {
+  const requested = Number(req.query.limit ?? 50)
+  const limit = Number.isFinite(requested) ? Math.max(1, Math.min(200, Math.trunc(requested))) : 50
+  const result = await pool.query(`
+    SELECT id, device_id AS "deviceId", source, stream_format AS "streamFormat",
+           byte_count AS "byteCount", barcode_count AS "barcodeCount", forwarded,
+           failure_kind AS "failureKind", app_version AS "appVersion",
+           captured_at AS "capturedAt", received_at AS "receivedAt"
+    FROM print_capture_diagnostics WHERE tenant_id = $1
+    ORDER BY captured_at DESC LIMIT $2
+  `, [config.tenantId, limit])
+  res.json({ captures: result.rows })
+})
+
 app.get('/api/v1/scans', requireAccess('supervisor'), async (req, res) => {
   const limit = Math.max(1, Math.min(500, Number(req.query.limit ?? 100)))
   const result = await pool.query(`
diff --git a/apps/api/src/sync.ts b/apps/api/src/sync.ts
index d393362..b0893b2 100644
--- a/apps/api/src/sync.ts
+++ b/apps/api/src/sync.ts
@@ -3,6 +3,25 @@ import type { PoolClient } from 'pg'
 import type { OutboxEvent, SyncAcknowledgement } from '@fieldlens/contracts'
 import type { AuthIdentity } from './auth.js'
 import type { DeviceContext } from './context.js'
+import { parsePrintTelemetry } from './printTelemetry.js'
+
+async function insertPrintTelemetry(client: PoolClient, event: OutboxEvent, context: DeviceContext, identity: AuthIdentity) {
+  const payload = parsePrintTelemetry(event.payload)
+  if (!payload || payload.id !== event.aggregateId) throw new Error('invalid_print_capture_diagnostic')
+  await client.query(`
+    INSERT INTO print_capture_diagnostics (
+      id, tenant_id, site_id, station_id, device_id, operator_subject,
+      source, stream_format, byte_count, barcode_count, forwarded,
+      failure_kind, app_version, captured_at
+    ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14)
+    ON CONFLICT (id) DO NOTHING
+  `, [
+    payload.id, context.tenantId, context.siteId, context.stationId, context.deviceId,
+    identity.subject, payload.source, payload.streamFormat, payload.byteCount,
+    payload.barcodeCount, payload.forwarded, payload.failureKind,
+    payload.appVersion, payload.capturedAt,
+  ])
+}
 
 async function insertScan(client: PoolClient, event: OutboxEvent, context: DeviceContext, identity: AuthIdentity) {
   const payload = event.payload as Record<string, unknown>
@@ -123,6 +142,9 @@ async function completePallet(client: PoolClient, event: OutboxEvent) {
 
 async function applyDomainEvent(client: PoolClient, event: OutboxEvent, context: DeviceContext, identity: AuthIdentity) {
   switch (event.eventType) {
+    case 'print.capture.diagnostic':
+      await insertPrintTelemetry(client, event, context, identity)
+      return
     case 'scan.captured':
       await insertScan(client, event, context, identity)
       return
diff --git a/migrations/005_print_capture_diagnostics.sql b/migrations/005_print_capture_diagnostics.sql
new file mode 100644
index 0000000..6cc8031
--- /dev/null
+++ b/migrations/005_print_capture_diagnostics.sql
@@ -0,0 +1,20 @@
+CREATE TABLE IF NOT EXISTS print_capture_diagnostics (
+  id uuid PRIMARY KEY,
+  tenant_id text NOT NULL REFERENCES tenants(id),
+  site_id uuid NOT NULL REFERENCES sites(id),
+  station_id uuid NOT NULL REFERENCES stations(id),
+  device_id uuid NOT NULL REFERENCES devices(id),
+  operator_subject text NOT NULL,
+  source text NOT NULL,
+  stream_format text NOT NULL,
+  byte_count bigint NOT NULL CHECK (byte_count >= 0),
+  barcode_count integer NOT NULL CHECK (barcode_count >= 0),
+  forwarded boolean NOT NULL,
+  failure_kind text,
+  app_version text NOT NULL,
+  captured_at timestamptz NOT NULL,
+  received_at timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_print_capture_diagnostics_tenant_time
+  ON print_capture_diagnostics(tenant_id, captured_at DESC);
diff --git a/packages/contracts/src/index.ts b/packages/contracts/src/index.ts
index 18283a5..5eee892 100644
--- a/packages/contracts/src/index.ts
+++ b/packages/contracts/src/index.ts
@@ -56,6 +56,7 @@ export type OutboxEvent = {
     | 'pallet.session.started'
     | 'pallet.observation.captured'
     | 'pallet.session.completed'
+    | 'print.capture.diagnostic'
   schemaVersion: SchemaVersion
   payload: unknown
   createdAt: string