diff --git a/configschema.json b/configschema.json
index fd5bfda..9488047 100644
--- a/configschema.json
+++ b/configschema.json
@@ -5,6 +5,23 @@
   "properties": {
     "exampleProperty": {
       "type": "string"
+    },
+    "startggClientId": {
+      "type": "string",
+      "default": "",
+      "description": "Client ID de tu OAuth app de start.gg"
+    },
+    "startggClientSecret": {
+      "type": "string",
+      "default": "",
+      "description": "Client Secret de tu OAuth app de start.gg"
+    },
+    "startggOAuthPort": {
+      "type": "integer",
+      "default": 34920,
+      "minimum": 1,
+      "maximum": 65535,
+      "description": "Puerto local para callback OAuth"
     }
   },
   "required": [
diff --git a/src/dashboard/scoreko-dev/views/Players.vue b/src/dashboard/scoreko-dev/views/Players.vue
index 668b466..deec974 100644
--- a/src/dashboard/scoreko-dev/views/Players.vue
+++ b/src/dashboard/scoreko-dev/views/Players.vue
@@ -4,7 +4,7 @@ import { useHead } from '@unhead/vue';
 defineOptions({ name: 'PlayersView' });
 
 import type { QTableColumn } from 'quasar';
-import { computed, reactive, ref, watch } from 'vue';
+import { computed, onBeforeUnmount, onMounted, reactive, ref, watch } from 'vue';
 import { countryOptions, getCountryLabel } from '../../../shared/countries';
 import type { Schemas } from '../../../types';
 import { usePlayersStore } from '../stores/players';
@@ -18,6 +18,29 @@ interface PlayerRow extends Player {
   id: string;
 }
 
+interface StartGGTournament {
+  id: number;
+  name: string;
+  slug: string;
+  startAt: number | null;
+  endAt: number | null;
+}
+
+interface StartGGImportedPlayer extends Player {
+  id: string;
+}
+
+const STARTGG_TOKEN_STORAGE_KEY = 'scoreko-dev.startgg-token';
+const STARTGG_TEMP_PLAYERS_STORAGE_KEY = 'scoreko-dev.startgg-temp-players';
+const STARTGG_TEMP_FALLBACK_DURATION_SECONDS = 12 * 60 * 60;
+
+interface TemporaryStartGGPlayerMeta {
+  expiresAt: number;
+  tournamentSlug: string;
+}
+
+type TemporaryStartGGPlayersMap = Record<string, TemporaryStartGGPlayerMeta>;
+
 const playersStore = usePlayersStore();
 const rows = computed<PlayerRow[]>(() => playersStore.rows);
 
@@ -73,6 +96,323 @@ watch(
   { immediate: true },
 );
 
+const startGGToken = ref(localStorage.getItem(STARTGG_TOKEN_STORAGE_KEY) ?? '');
+const recentTournaments = ref<StartGGTournament[]>([]);
+const loadingTournaments = ref(false);
+const tournamentsError = ref('');
+const isImportDialogOpen = ref(false);
+const loadingTournamentPlayers = ref(false);
+const importingTournament = ref<StartGGTournament | null>(null);
+const startGGPlayers = ref<StartGGImportedPlayer[]>([]);
+const selectedStartGGPlayerIds = ref<string[]>([]);
+const selectedTournamentSlug = ref('');
+const tournamentInput = ref('');
+const temporaryStartGGPlayers = ref<TemporaryStartGGPlayersMap>({});
+let temporaryCleanupTimer: ReturnType<typeof setInterval> | null = null;
+
+const oauthLoading = ref(false);
+const isManualTokenDialogOpen = ref(false);
+const manualTokenDraft = ref('');
+const oauthSessionId = ref('');
+let oauthPollingTimer: ReturnType<typeof setInterval> | null = null;
+
+interface OAuthSessionResponse {
+  sessionId: string;
+  authUrl: string;
+}
+
+interface OAuthStatusResponse {
+  status: 'pending' | 'completed' | 'error' | 'expired';
+  token?: string;
+  error?: string;
+}
+
+watch(startGGToken, (value) => {
+  localStorage.setItem(STARTGG_TOKEN_STORAGE_KEY, value);
+});
+
+const persistTemporaryStartGGPlayers = () => {
+  localStorage.setItem(STARTGG_TEMP_PLAYERS_STORAGE_KEY, JSON.stringify(temporaryStartGGPlayers.value));
+};
+
+const loadTemporaryStartGGPlayers = (): TemporaryStartGGPlayersMap => {
+  try {
+    const raw = localStorage.getItem(STARTGG_TEMP_PLAYERS_STORAGE_KEY);
+    if (!raw) {
+      return {};
+    }
+    const parsed = JSON.parse(raw) as unknown;
+    if (typeof parsed !== 'object' || parsed === null) {
+      return {};
+    }
+
+    const result: TemporaryStartGGPlayersMap = {};
+    Object.entries(parsed as Record<string, unknown>).forEach(([playerId, value]) => {
+      if (!playerId || typeof value !== 'object' || value === null) {
+        return;
+      }
+      const candidate = value as Record<string, unknown>;
+      const expiresAt = Number(candidate.expiresAt);
+      const tournamentSlug = String(candidate.tournamentSlug || '').trim();
+      if (!Number.isFinite(expiresAt) || expiresAt <= 0 || !tournamentSlug) {
+        return;
+      }
+      result[playerId] = {
+        expiresAt,
+        tournamentSlug,
+      };
+    });
+
+    return result;
+  } catch {
+    return {};
+  }
+};
+
+const tournamentOptions = computed(() =>
+  recentTournaments.value.map((tournament) => ({
+    label: tournament.name,
+    value: tournament.slug,
+    caption: tournament.slug,
+  })),
+);
+const filteredTournamentOptions = ref(tournamentOptions.value);
+
+watch(tournamentOptions, (value) => {
+  filteredTournamentOptions.value = value;
+  if (selectedTournamentSlug.value && !recentTournaments.value.some((item) => item.slug === selectedTournamentSlug.value)) {
+    selectedTournamentSlug.value = '';
+    tournamentInput.value = '';
+  }
+});
+
+const selectedTournamentOption = computed(() =>
+  recentTournaments.value.find((item) => item.slug === selectedTournamentSlug.value) ?? null,
+);
+const canImportSelectedTournament = computed(() => Boolean(selectedTournamentOption.value));
+const hasStartGGTokenConfigured = computed(() => Boolean(startGGToken.value.trim()));
+
+const filterTournaments = (value: string, update: (callback: () => void) => void) => {
+  update(() => {
+    const needle = value.toLowerCase().trim();
+    if (!needle) {
+      filteredTournamentOptions.value = tournamentOptions.value;
+      return;
+    }
+
+    filteredTournamentOptions.value = tournamentOptions.value.filter((option) =>
+      option.label.toLowerCase().includes(needle) || option.caption.toLowerCase().includes(needle),
+    );
+  });
+};
+
+const sendNodeCGMessage = <T>(messageName: string, payload: unknown): Promise<T> =>
+  new Promise((resolve, reject) => {
+    nodecg.sendMessage(messageName, payload, (error, response) => {
+      if (error) {
+        reject(new Error(String(error)));
+        return;
+      }
+      resolve(response as T);
+    });
+  });
+
+const clearOAuthPolling = () => {
+  if (oauthPollingTimer) {
+    clearInterval(oauthPollingTimer);
+    oauthPollingTimer = null;
+  }
+};
+
+const clearTemporaryCleanupTimer = () => {
+  if (temporaryCleanupTimer) {
+    clearInterval(temporaryCleanupTimer);
+    temporaryCleanupTimer = null;
+  }
+};
+
+const cleanupExpiredTemporaryPlayers = () => {
+  const now = Math.floor(Date.now() / 1000);
+  const expiredIds = Object.entries(temporaryStartGGPlayers.value)
+    .filter(([, meta]) => meta.expiresAt <= now)
+    .map(([playerId]) => playerId);
+
+  if (!expiredIds.length) {
+    return;
+  }
+
+  const nextMeta = { ...temporaryStartGGPlayers.value };
+  expiredIds.forEach((playerId) => {
+    playersStore.removePlayer(playerId);
+    delete nextMeta[playerId];
+  });
+
+  temporaryStartGGPlayers.value = nextMeta;
+  persistTemporaryStartGGPlayers();
+};
+
+const checkOAuthStatus = async () => {
+  if (!oauthSessionId.value) {
+    return;
+  }
+
+  try {
+    const status = await sendNodeCGMessage<OAuthStatusResponse>('startgg:getOAuthSessionStatus', {
+      sessionId: oauthSessionId.value,
+    });
+
+    if (status.status === 'completed' && status.token) {
+      startGGToken.value = status.token;
+      oauthLoading.value = false;
+      clearOAuthPolling();
+      oauthSessionId.value = '';
+      tournamentsError.value = '';
+      await loadRecentTournaments();
+      return;
+    }
+
+    if (status.status === 'error' || status.status === 'expired') {
+      oauthLoading.value = false;
+      clearOAuthPolling();
+      oauthSessionId.value = '';
+      tournamentsError.value = status.error || 'Could not complete OAuth login with start.gg.';
+    }
+  } catch (error) {
+    oauthLoading.value = false;
+    clearOAuthPolling();
+    oauthSessionId.value = '';
+    tournamentsError.value = error instanceof Error ? error.message : 'Could not verify OAuth status.';
+  }
+};
+
+const connectWithStartGGOAuth = async () => {
+  oauthLoading.value = true;
+  tournamentsError.value = '';
+  clearOAuthPolling();
+
+  try {
+    const session = await sendNodeCGMessage<OAuthSessionResponse>('startgg:createOAuthSession', {});
+    oauthSessionId.value = session.sessionId;
+    window.open(session.authUrl, '_blank', 'noopener,noreferrer');
+
+    oauthPollingTimer = setInterval(() => {
+      void checkOAuthStatus();
+    }, 1500);
+  } catch (error) {
+    oauthLoading.value = false;
+    tournamentsError.value = error instanceof Error ? error.message : 'Could not start OAuth with start.gg.';
+  }
+};
+
+const openManualTokenDialog = () => {
+  manualTokenDraft.value = startGGToken.value;
+  isManualTokenDialogOpen.value = true;
+};
+
+const saveManualToken = () => {
+  startGGToken.value = manualTokenDraft.value.trim();
+
+  if (!startGGToken.value) {
+    recentTournaments.value = [];
+    selectedTournamentSlug.value = '';
+    tournamentInput.value = '';
+    tournamentsError.value = '';
+  }
+
+  isManualTokenDialogOpen.value = false;
+};
+
+const loadRecentTournaments = async () => {
+  const token = startGGToken.value.trim();
+  if (!token) {
+    tournamentsError.value = 'Add your start.gg token to load tournaments.';
+    recentTournaments.value = [];
+    return;
+  }
+
+  tournamentsError.value = '';
+  loadingTournaments.value = true;
+  try {
+    const tournaments = await sendNodeCGMessage<StartGGTournament[]>('startgg:fetchRecentTournaments', {
+      token,
+    });
+    recentTournaments.value = tournaments;
+    if (!tournaments.length) {
+      tournamentsError.value = 'There are no recent tournaments for this account.';
+    }
+  } catch (error) {
+    tournamentsError.value = error instanceof Error ? error.message : 'Could not load tournaments.';
+    recentTournaments.value = [];
+  } finally {
+    loadingTournaments.value = false;
+  }
+};
+
+const openStartGGImportDialog = async (tournament: StartGGTournament) => {
+  importingTournament.value = tournament;
+  isImportDialogOpen.value = true;
+  loadingTournamentPlayers.value = true;
+  selectedStartGGPlayerIds.value = [];
+  selectedTournamentSlug.value = tournament.slug;
+  tournamentInput.value = tournament.name;
+  startGGPlayers.value = [];
+
+  try {
+    const importedPlayers = await sendNodeCGMessage<StartGGImportedPlayer[]>('startgg:fetchTournamentPlayers', {
+      token: startGGToken.value.trim(),
+      slug: tournament.slug,
+    });
+    startGGPlayers.value = importedPlayers;
+    selectedStartGGPlayerIds.value = importedPlayers.map((player) => player.id);
+  } catch (error) {
+    const message = error instanceof Error ? error.message : 'Could not load players';
+    window.alert(message);
+    isImportDialogOpen.value = false;
+  } finally {
+    loadingTournamentPlayers.value = false;
+  }
+};
+
+
+const openSelectedTournamentImportDialog = () => {
+  if (!selectedTournamentOption.value) {
+    return;
+  }
+  void openStartGGImportDialog(selectedTournamentOption.value);
+};
+
+const importSelectedStartGGPlayers = () => {
+  const selectedPlayers = startGGPlayers.value.filter((player) =>
+    selectedStartGGPlayerIds.value.includes(player.id),
+  );
+
+  const nextMeta = { ...temporaryStartGGPlayers.value };
+  const tournament = importingTournament.value;
+  const fallbackEndAt = (tournament?.startAt ?? Math.floor(Date.now() / 1000)) + STARTGG_TEMP_FALLBACK_DURATION_SECONDS;
+  const expiresAt = tournament?.endAt ?? fallbackEndAt;
+
+  selectedPlayers.forEach((player) => {
+    playersStore.upsertPlayer(player.id, {
+      gamertag: player.gamertag,
+      name: player.name,
+      team: player.team,
+      country: player.country,
+      twitter: player.twitter,
+    });
+
+    if (tournament) {
+      nextMeta[player.id] = {
+        expiresAt,
+        tournamentSlug: tournament.slug,
+      };
+    }
+  });
+
+  temporaryStartGGPlayers.value = nextMeta;
+  persistTemporaryStartGGPlayers();
+  isImportDialogOpen.value = false;
+};
+
 const generateId = () => {
   if (typeof crypto !== 'undefined' && 'randomUUID' in crypto) {
     return crypto.randomUUID();
@@ -141,6 +481,21 @@ const handleImport = async (event: Event) => {
     }
   }
 };
+
+onMounted(() => {
+  temporaryStartGGPlayers.value = loadTemporaryStartGGPlayers();
+  cleanupExpiredTemporaryPlayers();
+  temporaryCleanupTimer = setInterval(cleanupExpiredTemporaryPlayers, 60 * 1000);
+
+  if (startGGToken.value.trim()) {
+    void loadRecentTournaments();
+  }
+});
+
+onBeforeUnmount(() => {
+  clearOAuthPolling();
+  clearTemporaryCleanupTimer();
+});
 </script>
 
 <template>
@@ -159,68 +514,286 @@ const handleImport = async (event: Event) => {
       />
     </div>
 
-    <div class="row items-center q-gutter-sm q-mb-md">
-      <QInput
-        v-model="filter"
-        dense
-        placeholder="Search..."
-        class="players-search players-underlined-field"
-        clearable
-      >
-        <template #prepend>
-          <QIcon name="search" />
-        </template>
-      </QInput>
-      <QBtn
-        color="secondary"
-        outline
-        icon="file_upload"
-        label="Import"
-        @click="triggerImport"
-      />
-      <QBtn
-        color="secondary"
-        outline
-        icon="file_download"
-        label="Export"
-        @click="exportPlayers"
-      />
-      <input
-        ref="fileInput"
-        type="file"
-        class="visually-hidden"
-        accept="application/json"
-        @change="handleImport"
-      >
+    <div class="players-content row q-col-gutter-md">
+      <div class="col-12">
+        <div class="row items-center q-gutter-sm q-mb-md">
+          <QInput
+            v-model="filter"
+            dense
+            placeholder="Search..."
+            class="players-search players-underlined-field"
+            clearable
+          >
+            <template #prepend>
+              <QIcon name="search" />
+            </template>
+          </QInput>
+          <QBtn
+            color="secondary"
+            outline
+            icon="file_upload"
+            label="Import"
+            @click="triggerImport"
+          />
+          <QBtn
+            color="secondary"
+            outline
+            icon="file_download"
+            label="Export"
+            @click="exportPlayers"
+          />
+          <input
+            ref="fileInput"
+            type="file"
+            class="visually-hidden"
+            accept="application/json"
+            @change="handleImport"
+          >
+        </div>
+      </div>
+
+      <div class="col-12 col-lg-8 players-main-column">
+        <QTable
+          flat
+          bordered
+          row-key="id"
+          :rows="rows"
+          :columns="columns"
+          :filter="filter"
+          :rows-per-page-options="[10, 20, 50]"
+        >
+          <template #body-cell-actions="{ row }">
+            <QTd align="right">
+              <QBtn
+                size="sm"
+                flat
+                icon="edit"
+                @click="openEditDialog(row)"
+              />
+              <QBtn
+                size="sm"
+                flat
+                color="negative"
+                icon="delete"
+                @click="deletePlayer(row)"
+              />
+            </QTd>
+          </template>
+        </QTable>
+      </div>
+
+      <div class="col-12 col-lg-4 players-startgg-column">
+        <QCard
+          flat
+          bordered
+          class="q-pa-md"
+        >
+          <div class="text-h6 q-mb-sm startgg-heading">
+            <svg
+              class="startgg-heading__icon"
+              viewBox="0 0 24 24"
+              aria-hidden="true"
+            >
+              <path d="M6 0A5.999 5.999 0 00.002 6v5.252a.75.75 0 00.75.748H5.25a.748.748 0 00.75-.747V6.749C6 6.334 6.336 6 6.748 6h16.497a.748.748 0 00.749-.748V.749A.743.743 0 0023.247 0zm12.75 12a.748.748 0 00-.75.75v4.5a.748.748 0 01-.747.748H.753a.754.754 0 00-.75.751v4.5a.75.75 0 00.75.751H18a5.999 5.999 0 005.999-6v-5.25a.75.75 0 00-.75-.75z" />
+            </svg>
+            <span>StartGG</span>
+          </div>
+          <div class="text-caption q-mb-md">
+            Connect via OAuth (recommended) or paste your personal token to load tournaments you created or administrate. If you see "Client authentication failed", verify your config uses the Client ID/Secret from a start.gg OAuth App.
+          </div>
+          <div class="row q-col-gutter-sm items-center">
+            <div class="col-auto">
+              <QBtn
+                v-if="!hasStartGGTokenConfigured"
+                color="primary"
+                icon="login"
+                label="Connect with start.gg"
+                :loading="oauthLoading"
+                @click="connectWithStartGGOAuth"
+              />
+              <QBtn
+                v-else
+                outline
+                color="positive"
+                icon="check_circle"
+                label="Connected"
+                class="startgg-connected-btn"
+                @click="openManualTokenDialog"
+              />
+            </div>
+            <div class="col-auto">
+              <QBtn
+                outline
+                color="white"
+                icon="vpn_key"
+                label="Use personal API"
+                @click="openManualTokenDialog"
+              />
+            </div>
+          </div>
+          <div
+            v-if="tournamentsError"
+            class="text-negative q-mt-sm"
+          >
+            {{ tournamentsError }}
+          </div>
+          <div class="row items-center q-mt-md startgg-tournament-row">
+            <QBtn
+              flat
+              round
+              dense
+              text-color="white"
+              icon="sync"
+              class="startgg-refresh-btn"
+              :loading="loadingTournaments"
+              @click="loadRecentTournaments"
+            />
+            <div class="col">
+              <QSelect
+                v-model="selectedTournamentSlug"
+                v-model:input-value="tournamentInput"
+                :options="filteredTournamentOptions"
+                option-value="value"
+                option-label="label"
+                emit-value
+                map-options
+                use-input
+                hide-selected
+                fill-input
+                input-debounce="0"
+                clearable
+                dense
+                label="Tournament"
+                class="players-underlined-field"
+                @filter="filterTournaments"
+              >
+                <template #option="scope">
+                  <QItem v-bind="scope.itemProps">
+                    <QItemSection>
+                      <QItemLabel>{{ scope.opt.label }}</QItemLabel>
+                      <QItemLabel caption>
+                        {{ scope.opt.caption }}
+                      </QItemLabel>
+                    </QItemSection>
+                  </QItem>
+                </template>
+              </QSelect>
+            </div>
+            <div
+              v-if="canImportSelectedTournament"
+              class="col-auto"
+            >
+              <QBtn
+                color="primary"
+                unelevated
+                round
+                icon="person_add"
+                aria-label="Import players"
+                @click="openSelectedTournamentImportDialog"
+              >
+                <QTooltip>Import players</QTooltip>
+              </QBtn>
+            </div>
+          </div>
+        </QCard>
+      </div>
     </div>
 
-    <QTable
-      flat
-      bordered
-      row-key="id"
-      :rows="rows"
-      :columns="columns"
-      :filter="filter"
-      :rows-per-page-options="[10, 20, 50]"
-    >
-      <template #body-cell-actions="{ row }">
-        <QTd align="right">
+
+    <QDialog v-model="isManualTokenDialogOpen">
+      <QCard class="players-dialog">
+        <QCardSection>
+          <div class="text-h6">
+            Personal start.gg API
+          </div>
+        </QCardSection>
+        <QSeparator />
+        <QCardSection>
+          <div class="text-body2 q-mb-sm">
+            If OAuth fails, you can create your personal token manually with these steps:
+          </div>
+          <ol class="q-pl-md q-mb-md manual-token-steps">
+            <li>Go to https://start.gg/admin/profile/developer</li>
+            <li>Sign in with your account</li>
+            <li>From the 3 access tokens, click <strong>Third Party</strong></li>
+            <li>Create a new one and fill the description with any name you want</li>
+            <li>Copy the generated token and paste it into Scoreko</li>
+          </ol>
+          <QInput
+            v-model="manualTokenDraft"
+            label="Paste your personal token"
+            dense
+            outlined
+            type="password"
+          />
+        </QCardSection>
+        <QSeparator />
+        <QCardActions align="right">
           <QBtn
-            size="sm"
             flat
-            icon="edit"
-            @click="openEditDialog(row)"
+            label="Cancel"
+            color="secondary"
+            @click="isManualTokenDialogOpen = false"
           />
           <QBtn
-            size="sm"
             flat
             color="negative"
-            icon="delete"
-            @click="deletePlayer(row)"
+            label="Delete token"
+            @click="manualTokenDraft = ''; saveManualToken()"
           />
-        </QTd>
-      </template>
-    </QTable>
+          <QBtn
+            color="primary"
+            label="Save token"
+            @click="saveManualToken"
+          />
+        </QCardActions>
+      </QCard>
+    </QDialog>
+
+    <QDialog v-model="isImportDialogOpen">
+      <QCard class="players-dialog">
+        <QCardSection>
+          <div class="text-h6">
+            Import from {{ importingTournament?.name || 'start.gg' }}
+          </div>
+        </QCardSection>
+        <QSeparator />
+        <QCardSection>
+          <div
+            v-if="loadingTournamentPlayers"
+            class="row items-center q-gutter-sm"
+          >
+            <QSpinner />
+            <span>Loading participants...</span>
+          </div>
+          <div v-else>
+            <QOptionGroup
+              v-model="selectedStartGGPlayerIds"
+              type="checkbox"
+              :options="startGGPlayers.map((player) => ({
+                label: `${player.gamertag}${player.team ? ` (${player.team})` : ''}${player.country ? ` - ${getCountryLabel(player.country)}` : ''}`,
+                value: player.id,
+              }))"
+            />
+          </div>
+        </QCardSection>
+        <QSeparator />
+        <QCardActions align="right">
+          <QBtn
+            flat
+            label="Cancel"
+            color="secondary"
+            @click="isImportDialogOpen = false"
+          />
+          <QBtn
+            color="primary"
+            label="Import selected"
+            :disable="!selectedStartGGPlayerIds.length"
+            @click="importSelectedStartGGPlayers"
+          />
+        </QCardActions>
+      </QCard>
+    </QDialog>
 
     <QDialog v-model="isDialogOpen">
       <QCard class="players-dialog">
@@ -319,11 +892,50 @@ const handleImport = async (event: Event) => {
   min-width: 240px;
 }
 
+.players-content {
+  align-items: flex-start;
+}
+
+.players-main-column {
+  min-width: 0;
+  flex: 1 1 auto;
+}
+
+.players-startgg-column {
+  min-width: 320px;
+}
+
+
 .players-dialog {
   min-width: 320px;
   width: min(720px, 90vw);
 }
 
+
+.startgg-heading {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.startgg-heading__icon {
+  width: 20px;
+  height: 20px;
+  fill: #2e75ba;
+}
+
+.startgg-tournament-row {
+  gap: 4px;
+}
+
+.startgg-refresh-btn:hover {
+  background: rgba(255, 255, 255, 0.12);
+}
+
+.startgg-connected-btn {
+  font-weight: 600;
+}
+
 .players-underlined-field :deep(.q-field__control) {
   min-height: 28px;
   padding: 0;
@@ -337,6 +949,10 @@ const handleImport = async (event: Event) => {
   border-bottom: 1px solid rgba(255, 255, 255, 0.34);
 }
 
+.manual-token-steps {
+  line-height: 1.5;
+}
+
 .visually-hidden {
   position: absolute;
   width: 1px;
diff --git a/src/extension/index.ts b/src/extension/index.ts
index 2859808..f890cdf 100644
--- a/src/extension/index.ts
+++ b/src/extension/index.ts
@@ -9,4 +9,5 @@ export default async (nodecg: NodeCGServerAPI) => {
   set(nodecg); // set nodecg "context" before anything else
   await import('./util/replicants.js'); // make sure replicants are set up
   await import('./example.js');
+  await import('./startgg.js');
 };
diff --git a/src/extension/startgg.ts b/src/extension/startgg.ts
new file mode 100644
index 0000000..6c3282d
--- /dev/null
+++ b/src/extension/startgg.ts
@@ -0,0 +1,540 @@
+import { createServer, type Server, type ServerResponse } from 'node:http';
+import { randomUUID } from 'node:crypto';
+import { getData, type CountryRecord } from 'country-list';
+import { nodecg } from './util/nodecg.js';
+
+const STARTGG_ENDPOINT = 'https://api.start.gg/gql/alpha';
+const STARTGG_OAUTH_AUTHORIZE_ENDPOINT = 'https://www.start.gg/api/-/rest/oauth/authorize';
+const STARTGG_OAUTH_TOKEN_ENDPOINTS = [
+  'https://www.start.gg/api/-/rest/oauth/access_token',
+  'https://api.start.gg/oauth/access_token',
+];
+const STARTGG_OAUTH_SCOPES = 'user.identity tournament.manager';
+const STARTGG_OAUTH_CALLBACK_PATH = '/startgg/callback';
+const STARTGG_OAUTH_DEFAULT_PORT = 34920;
+const STARTGG_OAUTH_SESSION_TTL_MS = 10 * 60 * 1000;
+
+const RECENT_TOURNAMENTS_LIMIT = 12;
+const PARTICIPANTS_PAGE_SIZE = 120;
+
+interface StartGGGraphQLResponse<T> {
+  data?: T;
+  errors?: Array<{ message?: string }>;
+}
+
+interface RecentTournament {
+  id: number;
+  name: string;
+  slug: string;
+  startAt: number | null;
+  endAt: number | null;
+}
+
+interface ImportedPlayer {
+  id: string;
+  gamertag: string;
+  name: string;
+  team: string;
+  country: string;
+  twitter: string;
+}
+
+interface OAuthConfig {
+  clientId: string;
+  clientSecret: string;
+  callbackPort: number;
+}
+
+interface OAuthSession {
+  sessionId: string;
+  state: string;
+  expiresAt: number;
+  status: 'pending' | 'completed' | 'error' | 'expired';
+  token?: string;
+  error?: string;
+}
+
+interface OAuthTokenResponse {
+  access_token?: string;
+  error?: string;
+  error_description?: string;
+  message?: string;
+}
+
+const oauthSessions = new Map<string, OAuthSession>();
+let oauthCallbackServer: Server | null = null;
+
+const getStringProp = (payload: unknown, key: string): string => {
+  if (typeof payload !== 'object' || payload === null || !(key in payload)) {
+    return '';
+  }
+
+  const value = (payload as Record<string, unknown>)[key];
+  return typeof value === 'string' ? value.trim() : String(value || '').trim();
+};
+
+const updateOAuthSession = (sessionId: string, update: Partial<OAuthSession>) => {
+  const session = oauthSessions.get(sessionId);
+  if (!session) {
+    return;
+  }
+
+  oauthSessions.set(sessionId, {
+    ...session,
+    ...update,
+  });
+};
+
+const requestStartGG = async <T>(query: string, variables: Record<string, unknown>, token: string): Promise<T> => {
+  const response = await fetch(STARTGG_ENDPOINT, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+      Authorization: `Bearer ${token}`,
+    },
+    body: JSON.stringify({ query, variables }),
+  });
+
+  if (!response.ok) {
+    throw new Error(`start.gg responded with ${response.status} ${response.statusText}`.trim());
+  }
+
+  let payload: StartGGGraphQLResponse<T>;
+  try {
+    payload = (await response.json()) as StartGGGraphQLResponse<T>;
+  } catch {
+    throw new Error('Invalid JSON response from start.gg');
+  }
+
+  if (payload.errors?.length) {
+    throw new Error(payload.errors[0]?.message || 'Unknown start.gg error');
+  }
+
+  if (!payload.data) {
+    throw new Error('No data returned by start.gg');
+  }
+
+  return payload.data;
+};
+
+const countries = getData();
+const countryByCode = new Set(countries.map((country: CountryRecord) => country.code.toUpperCase()));
+const countryByName = new Map(countries.map((country: CountryRecord) => [country.name.toLowerCase(), country.code.toUpperCase()]));
+
+const resolveCountryCodeFromStartGG = (country: string | null | undefined): string => {
+  const raw = (country || '').trim();
+  if (!raw) {
+    return '';
+  }
+
+  const upper = raw.toUpperCase();
+  if (countryByCode.has(upper)) {
+    return upper;
+  }
+
+  return countryByName.get(raw.toLowerCase()) ?? '';
+};
+
+const sendAck = (ack: unknown, error: string | null, response?: unknown) => {
+  if (typeof ack !== 'function') {
+    return;
+  }
+  ack(error, response);
+};
+
+const getOAuthConfig = (): OAuthConfig | null => {
+  const bundleConfig = nodecg.bundleConfig as unknown as Record<string, unknown>;
+  const clientId = String(bundleConfig.startggClientId || '').trim();
+  const clientSecret = String(bundleConfig.startggClientSecret || '').trim();
+  const rawPort = Number(bundleConfig.startggOAuthPort ?? STARTGG_OAUTH_DEFAULT_PORT);
+  const callbackPort = Number.isFinite(rawPort) && rawPort > 0 ? rawPort : STARTGG_OAUTH_DEFAULT_PORT;
+
+  if (!clientId || !clientSecret) {
+    return null;
+  }
+
+  return {
+    clientId,
+    clientSecret,
+    callbackPort,
+  };
+};
+
+const getCallbackUrl = (callbackPort: number) => `http://127.0.0.1:${callbackPort}${STARTGG_OAUTH_CALLBACK_PATH}`;
+
+const cleanupExpiredOAuthSessions = () => {
+  const now = Date.now();
+  oauthSessions.forEach((session, sessionId) => {
+    if (session.expiresAt <= now && session.status === 'pending') {
+      updateOAuthSession(sessionId, { status: 'expired' });
+    }
+  });
+};
+
+const respondWithCallbackHtml = (res: ServerResponse, statusCode: number, title: string, message: string) => {
+  res.statusCode = statusCode;
+  res.setHeader('Content-Type', 'text/html; charset=utf-8');
+  res.end(renderCallbackHtml(title, message));
+};
+
+const renderCallbackHtml = (title: string, message: string) => `<!doctype html>
+<html lang="es">
+  <head>
+    <meta charset="utf-8" />
+    <title>${title}</title>
+    <style>
+      body { font-family: Arial, sans-serif; margin: 2rem; background: #121212; color: #fff; }
+      .box { max-width: 680px; padding: 1rem 1.2rem; border: 1px solid #444; border-radius: 8px; }
+      .ok { color: #66bb6a; }
+      .ko { color: #ef5350; }
+    </style>
+  </head>
+  <body>
+    <div class="box">
+      <h2>${title}</h2>
+      <p>${message}</p>
+      <p>You can close this tab and return to Scoreko.</p>
+    </div>
+  </body>
+</html>`;
+
+const parseOAuthTokenPayload = async (response: Response): Promise<OAuthTokenResponse> => {
+  const rawBody = await response.text();
+  try {
+    return JSON.parse(rawBody) as OAuthTokenResponse;
+  } catch {
+    return { message: rawBody };
+  }
+};
+
+const exchangeOAuthCodeForToken = async (
+  code: string,
+  redirectUri: string,
+  oauthConfig: OAuthConfig,
+): Promise<string> => {
+  const params = new URLSearchParams({
+    grant_type: 'authorization_code',
+    code,
+    client_id: oauthConfig.clientId,
+    client_secret: oauthConfig.clientSecret,
+    redirect_uri: redirectUri,
+  });
+
+  let lastError = 'Unknown OAuth token exchange error';
+
+  for (const tokenEndpoint of STARTGG_OAUTH_TOKEN_ENDPOINTS) {
+    const response = await fetch(tokenEndpoint, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/x-www-form-urlencoded',
+      },
+      body: params.toString(),
+    });
+
+    const payload = await parseOAuthTokenPayload(response);
+
+    if (response.ok) {
+      const token = String(payload.access_token || '').trim();
+      if (token) {
+        return token;
+      }
+
+      lastError = payload.error_description || payload.error || payload.message || 'OAuth token response did not include an access token';
+      continue;
+    }
+
+    lastError = payload.error_description || payload.error || payload.message || `OAuth token request failed (${response.status})`;
+
+    if (response.status !== 404) {
+      break;
+    }
+  }
+
+  throw new Error(lastError);
+};
+
+const ensureOAuthCallbackServer = async (oauthConfig: OAuthConfig) => {
+  if (oauthCallbackServer) {
+    return;
+  }
+
+  const callbackUrl = getCallbackUrl(oauthConfig.callbackPort);
+
+  const server = createServer((req, res) => {
+    if (!req.url) {
+      res.statusCode = 400;
+      res.end('Bad request');
+      return;
+    }
+
+    const requestUrl = new URL(req.url, callbackUrl);
+    if (requestUrl.pathname !== STARTGG_OAUTH_CALLBACK_PATH) {
+      res.statusCode = 404;
+      res.end('Not found');
+      return;
+    }
+
+    cleanupExpiredOAuthSessions();
+
+    const state = requestUrl.searchParams.get('state') || '';
+    const code = requestUrl.searchParams.get('code') || '';
+    const error = requestUrl.searchParams.get('error') || '';
+
+    const session = Array.from(oauthSessions.values()).find((candidate) => candidate.state === state);
+    if (!session) {
+      respondWithCallbackHtml(res, 400, 'Invalid OAuth', 'No active session was found for this authorization.');
+      return;
+    }
+
+    if (session.expiresAt <= Date.now()) {
+      updateOAuthSession(session.sessionId, { status: 'expired' });
+      respondWithCallbackHtml(res, 400, 'Session expired', 'The OAuth session expired. Start the process again from Scoreko.');
+      return;
+    }
+
+    if (error) {
+      updateOAuthSession(session.sessionId, { status: 'error', error });
+      respondWithCallbackHtml(res, 400, 'OAuth canceled', `start.gg returned this error: ${error}`);
+      return;
+    }
+
+    if (!code) {
+      updateOAuthSession(session.sessionId, {
+        status: 'error',
+        error: 'Missing authorization code',
+      });
+      respondWithCallbackHtml(res, 400, 'Incomplete OAuth', 'No authorization code was received.');
+      return;
+    }
+
+    void exchangeOAuthCodeForToken(code, callbackUrl, oauthConfig)
+      .then((token) => {
+        updateOAuthSession(session.sessionId, { status: 'completed', token, error: undefined });
+      })
+      .catch((exchangeError) => {
+        const message = exchangeError instanceof Error ? exchangeError.message : 'Failed to exchange authorization code';
+        updateOAuthSession(session.sessionId, { status: 'error', error: message });
+      });
+
+    respondWithCallbackHtml(res, 200, 'Authorization received', 'Your authorization was received. Finishing sign-in in the background...');
+  });
+
+  await new Promise<void>((resolve, reject) => {
+    server.once('error', reject);
+    server.listen(oauthConfig.callbackPort, '127.0.0.1', () => {
+      server.off('error', reject);
+      resolve();
+    });
+  });
+
+  oauthCallbackServer = server;
+};
+
+nodecg.listenFor('startgg:createOAuthSession', async (_payload: unknown, ack) => {
+  const oauthConfig = getOAuthConfig();
+  if (!oauthConfig) {
+    sendAck(ack, 'OAuth is not configured in this installation (missing startggClientId/startggClientSecret). Use the Client ID and Client Secret from a start.gg OAuth app.');
+    return;
+  }
+
+  try {
+    await ensureOAuthCallbackServer(oauthConfig);
+  } catch (serverError) {
+    const message = serverError instanceof Error ? serverError.message : 'Could not start the local OAuth callback';
+    sendAck(ack, message);
+    return;
+  }
+
+  cleanupExpiredOAuthSessions();
+
+  const sessionId = randomUUID();
+  const state = randomUUID();
+  const session: OAuthSession = {
+    sessionId,
+    state,
+    expiresAt: Date.now() + STARTGG_OAUTH_SESSION_TTL_MS,
+    status: 'pending',
+  };
+  oauthSessions.set(sessionId, session);
+
+  const params = new URLSearchParams({
+    response_type: 'code',
+    client_id: oauthConfig.clientId,
+    redirect_uri: getCallbackUrl(oauthConfig.callbackPort),
+    scope: STARTGG_OAUTH_SCOPES,
+    state,
+  });
+
+  sendAck(ack, null, {
+    sessionId,
+    authUrl: `${STARTGG_OAUTH_AUTHORIZE_ENDPOINT}?${params.toString()}`,
+  });
+});
+
+nodecg.listenFor('startgg:getOAuthSessionStatus', (payload: unknown, ack) => {
+  cleanupExpiredOAuthSessions();
+
+  const sessionId = getStringProp(payload, 'sessionId');
+
+  if (!sessionId) {
+    sendAck(ack, 'Missing OAuth session id');
+    return;
+  }
+
+  const session = oauthSessions.get(sessionId);
+  if (!session) {
+    sendAck(ack, 'OAuth session not found');
+    return;
+  }
+
+  sendAck(ack, null, {
+    status: session.status,
+    token: session.status === 'completed' ? session.token : undefined,
+    error: session.status === 'error' ? session.error : undefined,
+  });
+});
+
+nodecg.listenFor('startgg:fetchRecentTournaments', async (payload: unknown, ack) => {
+  const token = getStringProp(payload, 'token');
+
+  if (!token) {
+    sendAck(ack, 'Missing start.gg API token');
+    return;
+  }
+
+  const query = `
+    query RecentTournaments($perPage: Int!) {
+      currentUser {
+        tournaments(query: { perPage: $perPage, filter: { tournamentView: "admin" } }) {
+          nodes {
+            id
+            name
+            slug
+            startAt
+            endAt
+          }
+        }
+      }
+    }
+  `;
+
+  try {
+    const data = await requestStartGG<{
+      currentUser: { tournaments: { nodes: RecentTournament[] } } | null;
+    }>(query, { perPage: RECENT_TOURNAMENTS_LIMIT }, token);
+
+    const tournaments = data.currentUser?.tournaments.nodes
+      .filter((item) => item.slug)
+      .sort((a, b) => (b.startAt ?? 0) - (a.startAt ?? 0))
+      .map((item) => ({
+        id: item.id,
+        name: item.name,
+        slug: item.slug,
+        startAt: item.startAt,
+        endAt: item.endAt,
+      })) ?? [];
+
+    sendAck(ack, null, tournaments);
+  } catch (error) {
+    const message = error instanceof Error ? error.message : 'Unknown error while loading tournaments';
+    sendAck(ack, message);
+  }
+});
+
+nodecg.listenFor('startgg:fetchTournamentPlayers', async (payload: unknown, ack) => {
+  const token = getStringProp(payload, 'token');
+  const slug = getStringProp(payload, 'slug');
+
+  if (!token) {
+    sendAck(ack, 'Missing start.gg API token');
+    return;
+  }
+
+  if (!slug) {
+    sendAck(ack, 'Missing tournament slug');
+    return;
+  }
+
+  const query = `
+    query TournamentParticipants($slug: String!, $page: Int!, $perPage: Int!) {
+      tournament(slug: $slug) {
+        participants(query: { page: $page, perPage: $perPage }) {
+          pageInfo {
+            totalPages
+          }
+          nodes {
+            id
+            gamerTag
+            prefix
+            user {
+              location {
+                country
+              }
+            }
+          }
+        }
+      }
+    }
+  `;
+
+  try {
+    let currentPage = 1;
+    let totalPages = 1;
+    const playersMap = new Map<string, ImportedPlayer>();
+
+    while (currentPage <= totalPages) {
+      const data = await requestStartGG<{
+        tournament: {
+          participants: {
+            pageInfo: { totalPages: number };
+            nodes: Array<{
+              id: number;
+              gamerTag: string | null;
+              prefix: string | null;
+              user: {
+                location: {
+                  country: string | null;
+                } | null;
+              } | null;
+            }>;
+          };
+        } | null;
+      }>(query, {
+        slug,
+        page: currentPage,
+        perPage: PARTICIPANTS_PAGE_SIZE,
+      }, token);
+
+      if (!data.tournament) {
+        throw new Error('Tournament not found');
+      }
+
+      const apiTotalPages = Number(data.tournament.participants.pageInfo.totalPages);
+      totalPages = Number.isFinite(apiTotalPages) ? Math.max(apiTotalPages, 1) : 1;
+
+      data.tournament.participants.nodes.forEach((participant) => {
+        const playerId = String(participant.id);
+        const gamertag = (participant.gamerTag || '').trim();
+        if (!gamertag) {
+          return;
+        }
+        const country = resolveCountryCodeFromStartGG(participant.user?.location?.country);
+        playersMap.set(playerId, {
+          id: playerId,
+          gamertag,
+          name: gamertag,
+          team: (participant.prefix || '').trim(),
+          country,
+          twitter: '',
+        });
+      });
+
+      currentPage += 1;
+    }
+
+    sendAck(ack, null, Array.from(playersMap.values()));
+  } catch (error) {
+    const message = error instanceof Error ? error.message : 'Unknown error while importing players';
+    sendAck(ack, message);
+  }
+});
diff --git a/src/types/schemas/configschema.d.ts b/src/types/schemas/configschema.d.ts
index 7f91b92..f5f456d 100644
--- a/src/types/schemas/configschema.d.ts
+++ b/src/types/schemas/configschema.d.ts
@@ -8,4 +8,16 @@
 
 export interface Configschema {
 	exampleProperty: string;
+	/**
+	 * Client ID de tu OAuth app de start.gg
+	 */
+	startggClientId?: string;
+	/**
+	 * Client Secret de tu OAuth app de start.gg
+	 */
+	startggClientSecret?: string;
+	/**
+	 * Puerto local para callback OAuth
+	 */
+	startggOAuthPort?: number;
 }