diff --git a/Dockerfile b/Dockerfile
index 1c1045e..f2ef304 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM continuumio/miniconda3:24.7.1-0
 
 RUN apt-get --allow-releaseinfo-change update && \
     apt-get install -y \
-        build-essential libpq-dev netbase \
+        build-essential libpq-dev netbase curl \
     && rm -rf /var/lib/apt/lists/*
 
 RUN conda install -y -q pip wheel
diff --git a/python/lsst/production/tools/__init__.py b/python/lsst/production/tools/__init__.py
index 94d523b..3907f2d 100644
--- a/python/lsst/production/tools/__init__.py
+++ b/python/lsst/production/tools/__init__.py
@@ -21,7 +21,7 @@
 
 from flask import Flask, render_template
 
-from . import tractTable, logs, bokeh
+from . import tractTable, logs, bokeh, cache
 
 
 def create_app():
@@ -32,6 +32,7 @@ def create_app():
     app.register_blueprint(logs.bp)
     app.register_blueprint(tractTable.bp)
     app.register_blueprint(bokeh.bp)
+    app.register_blueprint(cache.bp)
 
     @app.route("/")
     def index():
@@ -40,4 +41,4 @@ def index():
     return app
 
 
-__all__ = [tractTable, logs, bokeh, create_app]
+__all__ = [tractTable, logs, bokeh, create_app, cache]
diff --git a/python/lsst/production/tools/cache.py b/python/lsst/production/tools/cache.py
new file mode 100644
index 0000000..a557a2a
--- /dev/null
+++ b/python/lsst/production/tools/cache.py
@@ -0,0 +1,143 @@
+# This file is part of production-tools.
+#
+# Developed for the LSST Data Management System.
+# This product includes software developed by the LSST Project
+# (https://www.lsst.org).
+# See the COPYRIGHT file at the top-level directory of this distribution
+# for details of code ownership.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import os
+import sys
+
+import lsst.daf.butler as dafButler
+from flask import Blueprint, Flask, jsonify, request, abort
+import arq
+import time
+
+import json
+import gzip
+import urllib.parse
+import boto3
+import botocore
+
+bp = Blueprint("cache", __name__, url_prefix="/plot-navigator/cache", static_folder="../../../../static")
+
+
+# PUT /cache/  {repo: "", collection: ""}, return {jobId: ""}
+# GET /cache/job/<job_id>, return {status: ""}
+
+@bp.route("/", methods=["PUT"])
+async def index():
+    redis_settings = arq.connections.RedisSettings(host=os.getenv("REDIS_HOST"),
+                                                   port=os.getenv("REDIS_PORT"))
+
+    redis = await arq.create_pool(redis_settings)
+    print(f"cache.index() received request: {request}")
+    if request.method == 'PUT':
+
+        data = request.get_json()
+        arq_job = await redis.enqueue_job("cache_plots", data['repo'], data['collection'])
+        return jsonify({"jobId": arq_job.job_id})
+
+    else:
+        abort(400, description=f"Invalid HTTP Method {request.method}")
+
+@bp.route("/job/<job_id>")
+async def job(job_id):
+
+    redis_settings = arq.connections.RedisSettings(host=os.getenv("REDIS_HOST"),
+                                                   port=os.getenv("REDIS_PORT"))
+
+    redis = await arq.create_pool(redis_settings)
+    arq_job = arq.jobs.Job(job_id=job_id, redis=redis)
+
+    job_result = await arq_job.result_info()
+
+    return jsonify({"status": await arq_job.status(),
+                    "result": job_result.result if job_result is not None else ""})
+
+async def cache_plots(ctx, repo, collection):
+
+    butler = dafButler.Butler(repo)
+
+    try:
+        summary = summarize_collection(butler, collection)
+    except dafButler.MissingCollectionError as e:
+        return f"Error: {e}"
+
+    encoded_collection_name = urllib.parse.quote_plus(collection)
+    encoded_repo = urllib.parse.quote_plus(repo)
+    filename = f"{encoded_repo}/collection_{encoded_collection_name}.json.gz"
+
+    session = boto3.Session(profile_name='rubin-plot-navigator')
+    s3_client = session.client('s3', endpoint_url=os.getenv("S3_ENDPOINT_URL"))
+
+    json_string = json.dumps(summary)
+    json_gzipped = gzip.compress(json_string.encode())
+
+    try:
+        # response = s3_client.upload_fileobj(json_gzipped, 'rubin-plot-navigator', filename)
+        response = s3_client.put_object(Body=json_gzipped, Bucket='rubin-plot-navigator', Key=filename)
+    except botocore.exceptions.ClientError as e:
+        return f"Error: {e}"
+
+
+    n_plots = len(summary['tracts']) + len(summary['visits']) + len(summary['global'])
+    return f"Success: {n_plots} plots"
+
+class Worker:
+    functions = [cache_plots]
+    redis_settings = arq.connections.RedisSettings(host=os.getenv("REDIS_HOST"),
+                                                   port=os.getenv("REDIS_PORT"))
+
+
+def summarize_collection(butler, collection_name):
+
+    out = {}
+
+    summary = butler.registry.getCollectionSummary(collection_name)
+
+    tract_plot_types = [x for x in list(summary.dataset_types) if x.storageClass_name == "Plot" and 'tract' in x.dimensions]
+    visit_plot_types = [x for x in list(summary.dataset_types) if x.storageClass_name == "Plot" and 'visit' in x.dimensions]
+    detector_plot_types = [x for x in list(summary.dataset_types) if x.storageClass_name == "Plot" and 'detector' in x.dimensions and 'visit' not in x.dimensions]
+    global_plot_types = [x for x in list(summary.dataset_types) if x.storageClass_name == "Plot" and 'tract' not in x.dimensions and 'visit' not in x.dimensions]
+
+    tract_datasets = list(butler.registry.queryDatasets(tract_plot_types, collections=collection_name, findFirst=True))
+    out['tracts'] = {}
+    for plot_type in tract_plot_types:
+        ref_dicts = [{"dataId": json.dumps(dict(datasetRef.dataId.mapping)), "id": str(datasetRef.id)} for datasetRef in tract_datasets if datasetRef.datasetType == plot_type]
+        if(len(ref_dicts) > 0):
+            out['tracts'][plot_type.name] = ref_dicts
+
+    visit_datasets = list(butler.registry.queryDatasets(visit_plot_types, collections=collection_name, findFirst=True))
+    out['visits'] = {}
+    for plot_type in visit_plot_types:
+        ref_dicts = [{"dataId": json.dumps(dict(datasetRef.dataId.mapping)), "id": str(datasetRef.id)} for datasetRef in visit_datasets if datasetRef.datasetType == plot_type]
+        if(len(ref_dicts) > 0):
+            out['visits'][plot_type.name] = ref_dicts
+
+    global_datasets = list(butler.registry.queryDatasets(global_plot_types, collections=collection_name, findFirst=True))
+    out['global'] = {}
+    for plot_type in global_plot_types:
+        ref_dicts = [{"dataId": json.dumps(dict(datasetRef.dataId.mapping)), "id": str(datasetRef.id)} for datasetRef in global_datasets if datasetRef.datasetType == plot_type]
+        if(len(ref_dicts) > 0):
+            out['global'][plot_type.name] = ref_dicts
+
+    #print("Tract plots: {:d}".format(len(out['tracts'])))
+    #print("Visit plots: {:d}".format(len(out['visits'])))
+    #print("Global plots: {:d}".format(len(out['global'])))
+
+    return out
diff --git a/requirements.txt b/requirements.txt
index ba53ade..5c6ffda 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-flask>2
+flask[async]
 lsst-daf-butler
 lsst-efd-client
 lsst-pex-config
@@ -9,4 +9,5 @@ botocore
 eventlet
 bokeh
 numpy>=1.26.0
+arq