diff --git a/src/actions/fetch-entities-actions.js b/src/actions/fetch-entities-actions.js
index bb5b2f76..ab492064 100644
--- a/src/actions/fetch-entities-actions.js
+++ b/src/actions/fetch-entities-actions.js
@@ -3,6 +3,58 @@ import SummitAPIRequest from "../utils/build-json/SummitAPIRequest";
 import EventAPIRequest from "../utils/build-json/EventsAPIRequest";
 import SpeakersAPIRequest from "../utils/build-json/SpeakersAPIRequest";
 
+const etagCache = new Map();
+const MAX_CACHE_SIZE = 100;
+
+export const clearEtagCacheForUrl = (urlPattern) => {
+    for (const key of etagCache.keys()) {
+        if (key.includes(urlPattern)) {
+            etagCache.delete(key);
+        }
+    }
+};
+
+const fetchWithEtag = async (url) => {
+    const headers = {};
+
+    if (etagCache.has(url)) {
+        const { etag } = etagCache.get(url);
+        if (etag) {
+            headers['If-None-Match'] = etag;
+        }
+    }
+
+    const res = await fetch(url, {
+        method: 'GET',
+        cache: "no-store",
+        headers,
+    });
+
+    if (res.status === 304 && etagCache.has(url)) {
+        const { body } = etagCache.get(url);
+        return body;
+    }
+
+    if (res.status === 200) {
+        const data = await res.json();
+        const responseETAG = res.headers.get('etag');
+        if (responseETAG) {
+            if (etagCache.size >= MAX_CACHE_SIZE) {
+                const oldest = etagCache.keys().next().value;
+                etagCache.delete(oldest);
+            }
+            etagCache.set(url, { etag: responseETAG, body: data });
+        }
+        return data;
+    }
+
+    if (!res.ok) {
+        console.error(`fetchWithEtag failed (${res.status}):`, url);
+    }
+
+    return null;
+};
+
 /**
  * @param summitId
  * @param eventId
@@ -18,16 +70,7 @@ export const fetchEventById = async (summitId, eventId, accessToken = null) => {
     }
 
     const apiUrlWithParams = EventAPIRequest.build(apiUrl);
-
-    return fetch(apiUrlWithParams, {
-        method: 'GET',
-        cache: "no-store",
-    }).then(async (response) => {
-        if (response.status === 200) {
-            return await response.json();
-        }
-        return null;
-    });
+    return fetchWithEtag(apiUrlWithParams);
 }
 
 /**
@@ -39,15 +82,8 @@ export const fetchEventById = async (summitId, eventId, accessToken = null) => {
 export const fetchStreamingInfoByEventId = async (summitId, eventId, accessToken) => {
     const apiUrl = URI(`${process.env.GATSBY_SUMMIT_API_BASE_URL}/api/v1/summits/${summitId}/events/${eventId}/published/streaming-info`);
     apiUrl.addQuery('access_token', accessToken);
-    return fetch(apiUrl.toString(), {
-        method: 'GET',
-        cache: "no-store",
-    }).then(async (response) => {
-        if (response.status === 200) {
-            return await response.json();
-        }
-        return null;
-    });
+    const url = apiUrl.toString();
+    return fetchWithEtag(url);
 }
 
 /**
@@ -64,19 +100,11 @@ export const fetchEventTypeById = async (summitId, eventTypeId, accessToken = nu
         apiUrl.addQuery('access_token', accessToken);
     }
 
-    return fetch(apiUrl.toString(), {
-        method: 'GET',
-        cache: "no-store",
-    }).then(async (response) => {
-        if (response.status === 200) {
-            return await response.json();
-        }
-        return null;
-    });
+    const url = apiUrl.toString();
+    return fetchWithEtag(url);
 }
 
 /**
- *
  * @param summitId
  * @param locationId
  * @param expand
@@ -94,19 +122,11 @@ export const fetchLocationById = async (summitId, locationId, expand, accessToke
     if (expand)
         apiUrl.addQuery('expand', expand);
 
-    return fetch(apiUrl.toString(), {
-        method: 'GET',
-        cache: "no-store",
-    }).then(async (response) => {
-        if (response.status === 200) {
-            return await response.json();
-        }
-        return null;
-    });
+    const url = apiUrl.toString();
+    return fetchWithEtag(url);
 }
 
 /**
- *
  * @param summitId
  * @param speakerId
  * @param accessToken
@@ -122,20 +142,10 @@ export const fetchSpeakerById = async (summitId, speakerId, accessToken = null)
     }
 
     const apiUrlWithParams = SpeakersAPIRequest.build(apiUrl);
-
-    return fetch(apiUrlWithParams, {
-        method: 'GET',
-        cache: "no-store",
-    }).then(async (response) => {
-        if (response.status === 200) {
-            return await response.json();
-        }
-        return null;
-    });
+    return fetchWithEtag(apiUrlWithParams);
 }
 
 /**
- *
  * @param summitId
  * @param accessToken
  * @returns {Promise<Response>}
@@ -149,16 +159,7 @@ export const fetchSummitById = async (summitId, accessToken = null) => {
     }
 
     const apiUrlWithParams = SummitAPIRequest.build(apiUrl);
-
-    return fetch(apiUrlWithParams, {
-        method: 'GET',
-        cache: "no-store",
-    }).then(async (response) => {
-        if (response.status === 200) {
-            return await response.json();
-        }
-        return null;
-    });
+    return fetchWithEtag(apiUrlWithParams);
 }
 
 /**
@@ -171,24 +172,17 @@ export const fetchTrackById = async (summitId, trackId, accessToken = null) => {
     let apiUrl = URI(`${process.env.GATSBY_SUMMIT_API_BASE_URL}/api/public/v1/summits/${summitId}/tracks/${trackId}`);
 
     const fields = [
-        "id", "name", "code", "order", "parent_id", "color","text_color",
+        "id", "name", "code", "order", "parent_id", "color", "text_color",
         "subtracks.id", "subtracks.name", "subtracks.code", "subtracks.order",
         "subtracks.parent_id", "subtracks.color", "subtracks.text_color",
     ];
-    const relations = ['subtracks','subtracks.none'];
+    const relations = ['subtracks', 'subtracks.none'];
     const expand = ['subtracks']
 
     apiUrl.addQuery('fields', fields.join(','));
     apiUrl.addQuery('relations', relations.join(','));
     apiUrl.addQuery('expand', expand.join(','));
 
-    return fetch(apiUrl.toString(), {
-        method: 'GET',
-        cache: "no-store",
-    }).then(async (response) => {
-        if (response.status === 200) {
-            return await response.json();
-        }
-        return null;
-    });
-}
+    const url = apiUrl.toString();
+    return fetchWithEtag(url);
+}
\ No newline at end of file
diff --git a/src/workers/sync_strategies/activity_synch_strategy.js b/src/workers/sync_strategies/activity_synch_strategy.js
index 2bd649bc..7bd5f5e7 100644
--- a/src/workers/sync_strategies/activity_synch_strategy.js
+++ b/src/workers/sync_strategies/activity_synch_strategy.js
@@ -1,5 +1,5 @@
 import AbstractSynchStrategy from "./abstract_synch_strategy";
-import {fetchEventById, fetchStreamingInfoByEventId} from "../../actions/fetch-entities-actions";
+import {clearEtagCacheForUrl, fetchEventById, fetchStreamingInfoByEventId} from "../../actions/fetch-entities-actions";
 import {insertSorted, intCheck, rebuildIndex} from "../../utils/arrayUtils";
 import {
     BUCKET_EVENTS_DATA_KEY,
@@ -161,8 +161,10 @@ class ActivitySynchStrategy extends AbstractSynchStrategy{
         switch (entity_operator) {
             case 'INSERT':
             case 'UPDATE':{
+                clearEtagCacheForUrl(`/v1/summits/${this.summit.id}/events/${entity_id}/published`);
                 let entity = await fetchEventById(this.summit.id, entity_id, this.accessToken);
                 if(this.accessToken && this._shouldFetchStreamingInfo(this.currentLocation)) {
+                    clearEtagCacheForUrl(`/v1/summits/${this.summit.id}/events/${entity_id}/published/streaming-info`)
                     const streaming_info = await fetchStreamingInfoByEventId(this.summit.id, entity_id, this.accessToken);
                     if(streaming_info) entity = {...entity, ...streaming_info};
                 }
diff --git a/src/workers/sync_strategies/activity_type_synch_strategy.js b/src/workers/sync_strategies/activity_type_synch_strategy.js
index 4a0f796b..ce2cc7a0 100644
--- a/src/workers/sync_strategies/activity_type_synch_strategy.js
+++ b/src/workers/sync_strategies/activity_type_synch_strategy.js
@@ -1,5 +1,5 @@
 import AbstractSynchStrategy from "./abstract_synch_strategy";
-import {fetchEventTypeById} from "../../actions/fetch-entities-actions";
+import {clearEtagCacheForUrl, fetchEventTypeById} from "../../actions/fetch-entities-actions";
 import {
     BUCKET_EVENTS_DATA_KEY,
     BUCKET_SUMMIT_DATA_KEY,
@@ -17,6 +17,8 @@ class ActivityTypeSynchStrategy extends AbstractSynchStrategy{
 
         const {entity_operator, entity_id} = payload;
 
+        clearEtagCacheForUrl(`/v1/summits/${this.summit.id}/event-types/${entity_id}`);
+
         const entity = await fetchEventTypeById(this.summit.id, entity_id, this.accessToken);
 
         if (entity_operator === 'UPDATE') {
diff --git a/src/workers/sync_strategies/speaker_synch_strategy.js b/src/workers/sync_strategies/speaker_synch_strategy.js
index 2e843e29..12c104a3 100644
--- a/src/workers/sync_strategies/speaker_synch_strategy.js
+++ b/src/workers/sync_strategies/speaker_synch_strategy.js
@@ -1,5 +1,5 @@
 import AbstractSynchStrategy from "./abstract_synch_strategy";
-import {fetchSpeakerById} from "../../actions/fetch-entities-actions";
+import {clearEtagCacheForUrl, fetchSpeakerById} from "../../actions/fetch-entities-actions";
 import {
     BUCKET_SUMMIT_DATA_KEY,
     BUCKET_EVENTS_DATA_KEY,
@@ -23,6 +23,7 @@ class SpeakerSynchStrategy extends AbstractSynchStrategy {
         const {entity_operator, entity_id} = payload;
         if (entity_operator === 'UPDATE') {
 
+            clearEtagCacheForUrl(`/v1/summits/${this.summit.id}/speakers/${entity_id}`);
 
             const entity = await fetchSpeakerById(this.summit.id, entity_id, this.accessToken);
 
diff --git a/src/workers/sync_strategies/summit_synch_strategy.js b/src/workers/sync_strategies/summit_synch_strategy.js
index a0e3471e..2deccfad 100644
--- a/src/workers/sync_strategies/summit_synch_strategy.js
+++ b/src/workers/sync_strategies/summit_synch_strategy.js
@@ -1,5 +1,5 @@
 import AbstractSynchStrategy from "./abstract_synch_strategy";
-import {fetchSummitById} from "../../actions/fetch-entities-actions";
+import {clearEtagCacheForUrl, fetchSummitById} from "../../actions/fetch-entities-actions";
 import {
     BUCKET_SUMMIT_DATA_KEY,
     saveFile
@@ -17,6 +17,8 @@ class SummitSynchStrategy extends AbstractSynchStrategy {
 
         const {entity_operator} = payload;
 
+        clearEtagCacheForUrl(`/v1/summits/${this.summit.id}?`);
+
         let entity = await fetchSummitById(this.summit.id, this.accessToken);
 
         let eventsData = [...this.allEvents];
diff --git a/src/workers/sync_strategies/track_synch_strategy.js b/src/workers/sync_strategies/track_synch_strategy.js
index 71efcd78..abf65476 100644
--- a/src/workers/sync_strategies/track_synch_strategy.js
+++ b/src/workers/sync_strategies/track_synch_strategy.js
@@ -1,5 +1,5 @@
 import AbstractSynchStrategy from "./abstract_synch_strategy";
-import {fetchTrackById} from "../../actions/fetch-entities-actions";
+import {clearEtagCacheForUrl, fetchTrackById} from "../../actions/fetch-entities-actions";
 import {
     BUCKET_EVENTS_DATA_KEY,
     BUCKET_EVENTS_IDX_DATA_KEY,
@@ -159,6 +159,7 @@ class TrackSynchStrategy extends AbstractSynchStrategy {
         switch (entity_operator) {
             case 'INSERT':
             case 'UPDATE':{
+                clearEtagCacheForUrl(`/v1/summits/${this.summit.id}/tracks/${entity_id}`);
                 const entity = await fetchTrackById(this.summit.id, entity_id, this.accessToken);
                 if (!entity) return Promise.reject('TrackSynchStrategy::process entity not found.');
                 return this._handleUpsert(entity, payload);
diff --git a/src/workers/sync_strategies/venue_room_synch_strategy.js b/src/workers/sync_strategies/venue_room_synch_strategy.js
index 91f27b48..edb856aa 100644
--- a/src/workers/sync_strategies/venue_room_synch_strategy.js
+++ b/src/workers/sync_strategies/venue_room_synch_strategy.js
@@ -1,5 +1,5 @@
 import AbstractSynchStrategy from "./abstract_synch_strategy";
-import { fetchLocationById } from "../../actions/fetch-entities-actions";
+import { clearEtagCacheForUrl, fetchLocationById } from "../../actions/fetch-entities-actions";
 import {
     BUCKET_EVENTS_DATA_KEY,
     BUCKET_EVENTS_IDX_DATA_KEY,
@@ -20,6 +20,8 @@ class VenueRoomSynchStrategy extends AbstractSynchStrategy{
 
         const {entity_operator, entity_id} = payload;
 
+        clearEtagCacheForUrl(`/v1/summits/${this.summit.id}/locations/${entity_id}`);
+
         const entity = await fetchLocationById(this.summit.id, entity_id, 'floor,venue' , this.accessToken);
 
         let eventsData = [...this.allEvents];