diff --git a/player/agent/internal/statusreporter/reporter.go b/player/agent/internal/statusreporter/reporter.go
new file mode 100644
index 0000000..1a1d68d
--- /dev/null
+++ b/player/agent/internal/statusreporter/reporter.go
@@ -0,0 +1,101 @@
+package statusreporter
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+)
+
+type Snapshot struct {
+	Status                string
+	ScreenID              string
+	ServerBaseURL         string
+	MQTTBroker            string
+	HeartbeatEverySeconds int
+	StartedAt             time.Time
+	LastHeartbeatAt       time.Time
+}
+
+type statusPayload struct {
+	ScreenID              string `json:"screen_id"`
+	Timestamp             string `json:"ts"`
+	Status                string `json:"status"`
+	ServerURL             string `json:"server_url"`
+	MQTTBroker            string `json:"mqtt_broker"`
+	HeartbeatEverySeconds int    `json:"heartbeat_every_seconds"`
+	StartedAt             string `json:"started_at,omitempty"`
+	LastHeartbeatAt       string `json:"last_heartbeat_at,omitempty"`
+}
+
+type Reporter struct {
+	baseURL string
+	client  *http.Client
+	now     func() time.Time
+}
+
+func New(baseURL string, client *http.Client, now func() time.Time) *Reporter {
+	if client == nil {
+		client = &http.Client{Timeout: 5 * time.Second}
+	}
+
+	if now == nil {
+		now = time.Now
+	}
+
+	return &Reporter{
+		baseURL: strings.TrimRight(baseURL, "/"),
+		client:  client,
+		now:     now,
+	}
+}
+
+func (r *Reporter) Send(ctx context.Context, snapshot Snapshot) error {
+	payload := buildPayload(snapshot, r.now())
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return fmt.Errorf("marshal status payload: %w", err)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, r.baseURL+"/api/v1/player/status", bytes.NewReader(body))
+	if err != nil {
+		return fmt.Errorf("build status request: %w", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := r.client.Do(req)
+	if err != nil {
+		return fmt.Errorf("send status request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("unexpected status response: %s", resp.Status)
+	}
+
+	return nil
+}
+
+func buildPayload(snapshot Snapshot, now time.Time) statusPayload {
+	payload := statusPayload{
+		ScreenID:              snapshot.ScreenID,
+		Timestamp:             now.Format(time.RFC3339),
+		Status:                snapshot.Status,
+		ServerURL:             snapshot.ServerBaseURL,
+		MQTTBroker:            snapshot.MQTTBroker,
+		HeartbeatEverySeconds: snapshot.HeartbeatEverySeconds,
+	}
+
+	if !snapshot.StartedAt.IsZero() {
+		payload.StartedAt = snapshot.StartedAt.Format(time.RFC3339)
+	}
+
+	if !snapshot.LastHeartbeatAt.IsZero() {
+		payload.LastHeartbeatAt = snapshot.LastHeartbeatAt.Format(time.RFC3339)
+	}
+
+	return payload
+}
diff --git a/player/agent/internal/statusreporter/reporter_test.go b/player/agent/internal/statusreporter/reporter_test.go
new file mode 100644
index 0000000..7ca17cc
--- /dev/null
+++ b/player/agent/internal/statusreporter/reporter_test.go
@@ -0,0 +1,84 @@
+package statusreporter
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+func TestBuildPayloadFromSnapshot(t *testing.T) {
+	startedAt := time.Date(2026, 3, 22, 15, 59, 30, 0, time.UTC)
+	lastHeartbeatAt := time.Date(2026, 3, 22, 16, 0, 0, 0, time.UTC)
+	snapshot := Snapshot{
+		Status:                "running",
+		ScreenID:              "info01-dev",
+		ServerBaseURL:         "http://127.0.0.1:8080",
+		MQTTBroker:            "tcp://127.0.0.1:1883",
+		HeartbeatEverySeconds: 30,
+		StartedAt:             startedAt,
+		LastHeartbeatAt:       lastHeartbeatAt,
+	}
+
+	payload := buildPayload(snapshot, lastHeartbeatAt)
+
+	if got, want := payload.ScreenID, "info01-dev"; got != want {
+		t.Fatalf("ScreenID = %q, want %q", got, want)
+	}
+
+	if got, want := payload.Timestamp, lastHeartbeatAt.Format(time.RFC3339); got != want {
+		t.Fatalf("Timestamp = %q, want %q", got, want)
+	}
+
+	if got, want := payload.StartedAt, startedAt.Format(time.RFC3339); got != want {
+		t.Fatalf("StartedAt = %q, want %q", got, want)
+	}
+
+	if got, want := payload.LastHeartbeatAt, lastHeartbeatAt.Format(time.RFC3339); got != want {
+		t.Fatalf("LastHeartbeatAt = %q, want %q", got, want)
+	}
+}
+
+func TestReporterSendStatus(t *testing.T) {
+	var received statusPayload
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if got, want := r.Method, http.MethodPost; got != want {
+			t.Fatalf("method = %s, want %s", got, want)
+		}
+
+		if got, want := r.URL.Path, "/api/v1/player/status"; got != want {
+			t.Fatalf("path = %s, want %s", got, want)
+		}
+
+		if err := json.NewDecoder(r.Body).Decode(&received); err != nil {
+			t.Fatalf("Decode() error = %v", err)
+		}
+
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{"status":"accepted"}`))
+	}))
+	defer server.Close()
+
+	reporter := New(server.URL, server.Client(), func() time.Time {
+		return time.Date(2026, 3, 22, 16, 0, 0, 0, time.UTC)
+	})
+
+	err := reporter.Send(context.Background(), Snapshot{
+		Status:                "running",
+		ScreenID:              "info01-dev",
+		ServerBaseURL:         "http://127.0.0.1:8080",
+		MQTTBroker:            "tcp://127.0.0.1:1883",
+		HeartbeatEverySeconds: 30,
+		StartedAt:             time.Date(2026, 3, 22, 15, 59, 30, 0, time.UTC),
+		LastHeartbeatAt:       time.Date(2026, 3, 22, 15, 59, 55, 0, time.UTC),
+	})
+	if err != nil {
+		t.Fatalf("Send() error = %v", err)
+	}
+
+	if got, want := received.ScreenID, "info01-dev"; got != want {
+		t.Fatalf("received.ScreenID = %q, want %q", got, want)
+	}
+}