diff --git a/src/app/api/integrations/clients/route.ts b/src/app/api/integrations/clients/route.ts
new file mode 100644
index 0000000..789c6ec
--- /dev/null
+++ b/src/app/api/integrations/clients/route.ts
@@ -0,0 +1,39 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { authenticateIntegrationRequest } from '@/lib/integrations-auth';
+import { createClient } from '@supabase/supabase-js';
+
+export async function GET(req: NextRequest) {
+  const auth = await authenticateIntegrationRequest(req, { requireTenant: false });
+  if (!auth.ok) {
+    return auth.errorResponse!;
+  }
+
+  const creativesEnabled = req.nextUrl.searchParams.get('creatives_enabled');
+
+  const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!;
+  const serviceRoleKey = process.env.SUPABASE_SERVICE_ROLE_KEY!;
+  const adminClient = createClient(supabaseUrl, serviceRoleKey);
+
+  let query = adminClient
+    .from('tenants')
+    .select('id, name, slug, meta_ad_account_id, slack_channel_id, drive_folder_id, creatives_enabled');
+
+  if (creativesEnabled === 'true') {
+    query = query.eq('creatives_enabled', true);
+  }
+
+  const { data: clients, error } = await query;
+
+  if (error) {
+    return NextResponse.json({ error: error.message }, { status: 500 });
+  }
+
+  // Se devuelven mapeando id tanto a client_id como a tenant_id para compatibilidad total con n8n
+  const mapped = (clients || []).map((c: any) => ({
+    ...c,
+    client_id: c.id,
+    tenant_id: c.id,
+  }));
+
+  return NextResponse.json(mapped);
+}
diff --git a/src/app/api/integrations/fatigue/candidates/route.ts b/src/app/api/integrations/fatigue/candidates/route.ts
new file mode 100644
index 0000000..e668d8e
--- /dev/null
+++ b/src/app/api/integrations/fatigue/candidates/route.ts
@@ -0,0 +1,84 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { authenticateIntegrationRequest } from '@/lib/integrations-auth';
+import { createClient } from '@supabase/supabase-js';
+
+export async function GET(req: NextRequest) {
+  const auth = await authenticateIntegrationRequest(req, { requireTenant: true });
+  if (!auth.ok) {
+    return auth.errorResponse!;
+  }
+
+  const tenantId = auth.tenantId!;
+  const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!;
+  const serviceRoleKey = process.env.SUPABASE_SERVICE_ROLE_KEY!;
+  const adminClient = createClient(supabaseUrl, serviceRoleKey);
+
+  // 1. Obtener reglas de fatiga del cliente
+  const { data: rules, error: rulesErr } = await adminClient
+    .from('fatigue_rules')
+    .select('*')
+    .eq('tenant_id', tenantId)
+    .maybeSingle();
+
+  if (rulesErr) {
+    return NextResponse.json({ error: rulesErr.message }, { status: 500 });
+  }
+
+  const lookbackDays = rules?.lookback_days || 7;
+
+  // 2. Calcular fecha de inicio según lookback_days
+  const sinceDate = new Date();
+  sinceDate.setDate(sinceDate.getDate() - lookbackDays);
+  const sinceStr = sinceDate.toISOString().split('T')[0];
+
+  // 3. Buscar creatividades actualmente publicadas para este cliente
+  const { data: publishedCreatives, error: creativesErr } = await adminClient
+    .from('creatives')
+    .select('id, tenant_id, campaign_name, adset_id, meta_ad_id, format, angle, hook, primary_text, headline, cta, asset_url, thumbnail_url, status, visibility, created_at')
+    .eq('tenant_id', tenantId)
+    .eq('status', 'publicada');
+
+  if (creativesErr) {
+    return NextResponse.json({ error: creativesErr.message }, { status: 500 });
+  }
+
+  const metaIds = (publishedCreatives || [])
+    .map((c: any) => c.meta_ad_id)
+    .filter(Boolean);
+
+  let metricsMap = new Map<string, any[]>();
+
+  if (metaIds.length > 0) {
+    const { data: metrics, error: metricsErr } = await adminClient
+      .from('creative_metrics_daily')
+      .select('*')
+      .eq('tenant_id', tenantId)
+      .in('meta_ad_id', metaIds)
+      .gte('date', sinceStr)
+      .order('date', { ascending: true });
+
+    if (metricsErr) {
+      return NextResponse.json({ error: metricsErr.message }, { status: 500 });
+    }
+
+    (metrics || []).forEach((m: any) => {
+      const list = metricsMap.get(m.meta_ad_id) || [];
+      list.push(m);
+      metricsMap.set(m.meta_ad_id, list);
+    });
+  }
+
+  const candidates = (publishedCreatives || []).map((c: any) => ({
+    ...c,
+    client_id: c.tenant_id,
+    metrics: metricsMap.get(c.meta_ad_id) || [],
+  }));
+
+  return NextResponse.json({
+    client_id: tenantId,
+    tenant_id: tenantId,
+    lookback_days: lookbackDays,
+    rules: rules || null,
+    candidates,
+  });
+}
diff --git a/src/app/api/integrations/fatigue/mark/route.ts b/src/app/api/integrations/fatigue/mark/route.ts
new file mode 100644
index 0000000..be01ba6
--- /dev/null
+++ b/src/app/api/integrations/fatigue/mark/route.ts
@@ -0,0 +1,135 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { authenticateIntegrationRequest } from '@/lib/integrations-auth';
+import { createClient } from '@supabase/supabase-js';
+
+export async function POST(req: NextRequest) {
+  let body: any;
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: 'Invalid JSON body' }, { status: 400 });
+  }
+
+  const auth = await authenticateIntegrationRequest(req, { requireTenant: true });
+  if (!auth.ok) {
+    return auth.errorResponse!;
+  }
+
+  const tenantId = auth.tenantId!;
+  const creativeId = body.creative_id;
+  const signals = body.signals || {};
+
+  if (!creativeId) {
+    return NextResponse.json({ error: 'creative_id is required' }, { status: 400 });
+  }
+
+  const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!;
+  const serviceRoleKey = process.env.SUPABASE_SERVICE_ROLE_KEY!;
+  const adminClient = createClient(supabaseUrl, serviceRoleKey);
+
+  // 1. Obtener la creatividad a marcar
+  const { data: creative, error: getErr } = await adminClient
+    .from('creatives')
+    .select('*, tenant:tenants(slug, name)')
+    .eq('id', creativeId)
+    .eq('tenant_id', tenantId)
+    .maybeSingle();
+
+  if (getErr || !creative) {
+    return NextResponse.json({ error: 'Creatividad no encontrada' }, { status: 404 });
+  }
+
+  const previousStatus = creative.status;
+
+  // 2. Actualizar estado de la creatividad a 'fatigada'
+  const { error: updateErr } = await adminClient
+    .from('creatives')
+    .update({
+      status: 'fatigada',
+      updated_at: new Date().toISOString(),
+    })
+    .eq('id', creativeId);
+
+  if (updateErr) {
+    return NextResponse.json({ error: updateErr.message }, { status: 500 });
+  }
+
+  // 3. Registrar evento en creative_events
+  await adminClient.from('creative_events').insert({
+    tenant_id: tenantId,
+    creative_id: creativeId,
+    event_type: 'fatigue_detected',
+    actor: 'n8n',
+    from_status: previousStatus,
+    to_status: 'fatigada',
+    payload: { signals },
+    visibility: 'agency',
+  });
+
+  // 4. Consultar fatigue_rules para ver si auto_request_relief es true
+  const { data: rules } = await adminClient
+    .from('fatigue_rules')
+    .select('*')
+    .eq('tenant_id', tenantId)
+    .maybeSingle();
+
+  let generationRequest = null;
+
+  if (rules?.auto_request_relief) {
+    const avoidAngles = creative.angle ? [creative.angle] : [];
+    const clientSlug = creative.tenant?.slug || 'bps';
+
+    const deadline = new Date();
+    deadline.setDate(deadline.getDate() + 1); // 24 horas después
+
+    const brief = {
+      client_id: tenantId,
+      tenant_id: tenantId,
+      client_slug: clientSlug,
+      reason: 'fatiga',
+      source_creative_id: creativeId,
+      format: creative.format === 'video' || creative.format === 'carrusel' ? creative.format : 'estatico',
+      aspect_ratio: '4:5',
+      variants_requested: 2,
+      avoid_angles: avoidAngles,
+      campaign_name: creative.campaign_name || 'General',
+      adset_id: creative.adset_id || null,
+      language: 'es',
+      deadline: deadline.toISOString(),
+    };
+
+    const { data: createdReq, error: reqErr } = await adminClient
+      .from('generation_requests')
+      .insert({
+        tenant_id: tenantId,
+        reason: 'fatiga',
+        source_creative_id: creativeId,
+        brief,
+        status: 'pendiente',
+      })
+      .select('*')
+      .single();
+
+    if (!reqErr && createdReq) {
+      generationRequest = createdReq;
+
+      // Registrar evento de relevo solicitado
+      await adminClient.from('creative_events').insert({
+        tenant_id: tenantId,
+        creative_id: creativeId,
+        event_type: 'generation_requested',
+        actor: 'system',
+        payload: { generation_request_id: createdReq.id, brief },
+        visibility: 'agency',
+      });
+    }
+  }
+
+  return NextResponse.json({
+    ok: true,
+    creative_id: creativeId,
+    status: 'fatigada',
+    signals,
+    generation_request: generationRequest,
+  });
+}
diff --git a/src/app/api/integrations/metrics/daily/route.ts b/src/app/api/integrations/metrics/daily/route.ts
new file mode 100644
index 0000000..c9a2c2e
--- /dev/null
+++ b/src/app/api/integrations/metrics/daily/route.ts
@@ -0,0 +1,144 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { authenticateIntegrationRequest } from '@/lib/integrations-auth';
+import { createClient } from '@supabase/supabase-js';
+
+export async function POST(req: NextRequest) {
+  let body: any;
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: 'Invalid JSON body' }, { status: 400 });
+  }
+
+  const auth = await authenticateIntegrationRequest(req, { requireTenant: true });
+  if (!auth.ok) {
+    return auth.errorResponse!;
+  }
+
+  const tenantId = auth.tenantId!;
+  const rows = Array.isArray(body) ? body : body.metrics || [body];
+
+  if (!rows.length) {
+    return NextResponse.json({ error: 'No metrics rows provided' }, { status: 400 });
+  }
+
+  const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!;
+  const serviceRoleKey = process.env.SUPABASE_SERVICE_ROLE_KEY!;
+  const adminClient = createClient(supabaseUrl, serviceRoleKey);
+
+  // 1. Recoger meta_ad_ids únicos de las métricas entrantes
+  const metaAdIds = Array.from(new Set(rows.map((r: any) => r.meta_ad_id).filter(Boolean)));
+
+  if (!metaAdIds.length) {
+    return NextResponse.json({ error: 'Rows must include meta_ad_id' }, { status: 400 });
+  }
+
+  // 2. Buscar creatividades existentes con esos meta_ad_ids en este tenant
+  const { data: existingCreatives, error: searchErr } = await adminClient
+    .from('creatives')
+    .select('id, meta_ad_id')
+    .eq('tenant_id', tenantId)
+    .in('meta_ad_id', metaAdIds);
+
+  if (searchErr) {
+    return NextResponse.json({ error: searchErr.message }, { status: 500 });
+  }
+
+  const creativeMap = new Map<string, string>();
+  (existingCreatives || []).forEach((c: any) => {
+    creativeMap.set(c.meta_ad_id, c.id);
+  });
+
+  // 3. Crear creatividades para los meta_ad_ids que no existan previamente
+  // Según brief: "Si el meta_ad_id no existe en creatives, crea la fila con status='publicada', created_by='agency', visibility='client'"
+  const missingMetaIds = metaAdIds.filter((id) => !creativeMap.has(id));
+
+  if (missingMetaIds.length > 0) {
+    const toInsert = missingMetaIds.map((metaId) => {
+      // Buscar información adicional si viene en la fila de métricas
+      const sampleRow = rows.find((r: any) => r.meta_ad_id === metaId) || {};
+      return {
+        tenant_id: tenantId,
+        meta_ad_id: metaId,
+        format: sampleRow.format || 'estatico',
+        campaign_name: sampleRow.campaign_name || null,
+        adset_id: sampleRow.adset_id || null,
+        headline: sampleRow.headline || null,
+        primary_text: sampleRow.primary_text || null,
+        status: 'publicada',
+        visibility: 'client',
+        created_by: 'agency',
+      };
+    });
+
+    const { data: inserted, error: insertErr } = await adminClient
+      .from('creatives')
+      .insert(toInsert)
+      .select('id, meta_ad_id');
+
+    if (insertErr) {
+      return NextResponse.json({ error: `Error creating placeholder creatives: ${insertErr.message}` }, { status: 500 });
+    }
+
+    (inserted || []).forEach((c: any) => {
+      creativeMap.set(c.meta_ad_id, c.id);
+    });
+  }
+
+  // 4. Preparar upsert de métricas
+  const metricsToUpsert = rows.map((r: any) => {
+    const creativeId = creativeMap.get(r.meta_ad_id);
+    const impressions = Number(r.impressions) || 0;
+    const clicks = Number(r.clicks) || 0;
+    const spend = Number(r.spend) || 0;
+    const results = Number(r.results) || 0;
+    const reach = Number(r.reach) || impressions;
+    const frequency = Number(r.frequency) || (reach > 0 ? Number((impressions / reach).toFixed(2)) : 0);
+    const ctr = r.ctr !== undefined ? Number(r.ctr) : (impressions > 0 ? Number(((clicks / impressions) * 100).toFixed(3)) : 0);
+    const cpm = r.cpm !== undefined ? Number(r.cpm) : (impressions > 0 ? Number(((spend / impressions) * 1000).toFixed(2)) : 0);
+    const cpc = r.cpc !== undefined ? Number(r.cpc) : (clicks > 0 ? Number((spend / clicks).toFixed(2)) : 0);
+    const cpa = r.cpa !== undefined ? Number(r.cpa) : (results > 0 ? Number((spend / results).toFixed(2)) : null);
+
+    return {
+      tenant_id: tenantId,
+      creative_id: creativeId,
+      meta_ad_id: r.meta_ad_id,
+      date: r.date,
+      impressions,
+      reach,
+      frequency,
+      clicks,
+      ctr,
+      cpm,
+      cpc,
+      spend,
+      results,
+      cpa,
+      raw: r.raw || null,
+    };
+  });
+
+  const { data: upserted, error: upsertErr } = await adminClient
+    .from('creative_metrics_daily')
+    .upsert(metricsToUpsert, { onConflict: 'meta_ad_id,date' })
+    .select('id, meta_ad_id, date');
+
+  if (upsertErr) {
+    return NextResponse.json({ error: upsertErr.message }, { status: 500 });
+  }
+
+  // Registrar evento de ingesta en creative_events
+  await adminClient.from('creative_events').insert({
+    tenant_id: tenantId,
+    event_type: 'metrics_ingested',
+    actor: 'n8n',
+    payload: { rows_count: metricsToUpsert.length, meta_ad_ids: metaAdIds },
+    visibility: 'agency',
+  });
+
+  return NextResponse.json({
+    ok: true,
+    count: upserted?.length || metricsToUpsert.length,
+    rows: upserted,
+  });
+}