diff --git a/client/index.html b/client/index.html
index 2e6c82fee..cd49d006c 100644
--- a/client/index.html
+++ b/client/index.html
@@ -46,7 +46,7 @@
diff --git a/dev_docs/developer_guidelines.md b/dev_docs/developer_guidelines.md
index c29d0839f..9af8c454f 100644
--- a/dev_docs/developer_guidelines.md
+++ b/dev_docs/developer_guidelines.md
@@ -58,6 +58,24 @@ Puppeteer is a dependency for e2e tests, but it's not used for running Explorer
If you want to actually run e2e tests, then you'll need to set up Chromium to enable Puppeteer. [This blog post](https://broddin.be/2022/09/19/fixing-the-chromium-binary-is-not-available-for-arm64/) should show you how to do that on an M1/M2 machine.
+### Mocking the dataset-metadata endpoint
+
+The dataset-metadata endpoint requires using data-portal. A true local build would require running an instance of data-portal locally. An easier solution that works for most use cases is to just mock the response of dataset-metadata. To do this, you can update the `DatasetMetadataAPI` class in `server/app/api/v3.py` to:
+
+```
+class DatasetMetadataAPI(DatasetResource):
+ @cache_control(public=True, no_store=True, max_age=0)
+ @rest_get_dataset_explorer_location_data_adaptor
+ def get(self, data_adaptor):
+ with open("server/tests/fixtures/liver_dataset_metadata_response.json", "r") as file:
+ mock_response = json.load(file)
+
+ json_response = json.dumps(mock_response)
+ return Response(json_response, content_type='application/json')
+```
+
+Note that you'll need to `import json` and also add `Response` to the `flask` import. This will mock the expected response to the `liver.cxg` dataset that is in the `example-dataset/` directory. After updating the mock response, you can build the backend + frontend the same way you normally would.
+
### Before you request a PR review...
Please lint and format your code before requesting a PR review.
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diff --git a/server/tests/fixtures/liver_dataset_metadata_response.json b/server/tests/fixtures/liver_dataset_metadata_response.json
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--- /dev/null
+++ b/server/tests/fixtures/liver_dataset_metadata_response.json
@@ -0,0 +1,1422 @@
+{
+ "metadata": {
+ "collection_contact_email": "tallulandrews@gmail.com",
+ "collection_contact_name": "Tallulah Andrews",
+ "collection_datasets": [
+ {
+ "assay": [
+ {
+ "label": "10x 3' v2",
+ "ontology_term_id": "EFO:0009899"
+ },
+ {
+ "label": "10x 3' v3",
+ "ontology_term_id": "EFO:0009922"
+ }
+ ],
+ "cell_count": 73295,
+ "cell_type": [
+ {
+ "label": "B cell",
+ "ontology_term_id": "CL:0000236"
+ },
+ {
+ "label": "Kupffer cell",
+ "ontology_term_id": "CL:0000091"
+ },
+ {
+ "label": "blood vessel endothelial cell",
+ "ontology_term_id": "CL:0000071"
+ },
+ {
+ "label": "centrilobular region hepatocyte",
+ "ontology_term_id": "CL:0019029"
+ },
+ {
+ "label": "cholangiocyte",
+ "ontology_term_id": "CL:1000488"
+ },
+ {
+ "label": "endothelial cell of pericentral hepatic sinusoid",
+ "ontology_term_id": "CL:0019022"
+ },
+ {
+ "label": "erythroid lineage cell",
+ "ontology_term_id": "CL:0000764"
+ },
+ {
+ "label": "hepatic stellate cell",
+ "ontology_term_id": "CL:0000632"
+ },
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+ },
+ {
+ "family": "Regev",
+ "given": "Aviv"
+ },
+ {
+ "family": "McGilvray",
+ "given": "Ian D."
+ },
+ {
+ "family": "Bader",
+ "given": "Gary D."
+ },
+ {
+ "family": "MacParland",
+ "given": "Sonya A."
+ }
+ ],
+ "is_preprint": false,
+ "journal": "Hepatology Communications",
+ "published_at": 1648771200.0,
+ "published_day": 1,
+ "published_month": 4,
+ "published_year": 2022
+ },
+ "collection_url": "https://cellxgene.cziscience.com/collections/44531dd9-1388-4416-a117-af0a99de2294",
+ "dataset_id": "90c609bd-1439-4cbf-935f-201ecadf0297",
+ "dataset_name": "Healthy human liver: B cells"
+ }
+}
\ No newline at end of file