diff --git a/documentation/GUIDE__AE_API_V3_for_Frontend.md b/documentation/GUIDE__AE_API_V3_for_Frontend.md
index b7e32d2..5b005a3 100644
--- a/documentation/GUIDE__AE_API_V3_for_Frontend.md
+++ b/documentation/GUIDE__AE_API_V3_for_Frontend.md
@@ -293,6 +293,73 @@ Frontend guidance:
 
 ---
 
+## Axonius Zoom CSV Upload (Temporary — Apr 2026)
+
+Purpose: Staff-only quick upload to upsert Event Person + Event Badge records from a Zoom Events registrant CSV.
+
+- **Endpoint:** `POST /event/{event_id}/badge/import/zoom_csv`
+- **Auth:** include `x-aether-api-key` (if required) and account context via `x-account-id: <ACCOUNT_ID>`. Admin bypass (`x-no-account-id: bypass`) or `?jwt=<token>` are accepted per site policy.
+- **Request:** `multipart/form-data` with single file field `file` (Zoom CSV). Query params:
+  - `begin_at` (int, default `0`)
+  - `end_at` (int, default `20000`)
+  - `return_detail` (bool, default `false`)
+  - Delimiter is auto-detected; Zoom CSV layout: row 1 = metadata, row 2 = blank, row 3 = headers (the backend skips the first two rows).
+
+Behavior / notes:
+- The handler forces `Registrant email` to be used as the `external_id`. `Unique identifier` is used as `external_registration_id` only when it is meaningful (placeholders like `N/A`, `NA`, `UNKNOWN` are ignored).
+- Per-ticket custom fields are parsed (Organization, Job title, Phone, Address lines, City, State/Province, Postal/Zip, Country, etc.).
+- Marketing-consent values are mapped to `agree_to_tc` and `allow_tracking`.
+- TEMP AXONIUS MAPPING: the import temporarily defaults `event_badge_template_id` to `21` and `event_badge_template_id_random` to `RKYp2HcQm9o`. Ticket-name → `badge_type_code` mapping is applied for some labels (e.g., contains "sponsor" → `sponsor`; contains "attend"/"attendee" → `attendee`). This mapping is temporary (April 2026) — surface this to staff.
+- Rows missing `Registrant email` are skipped.
+- The server upserts via existing backend methods and creates/updates `event_person`, `event_person_profile`, and `event_badge` records as needed.
+
+Frontend guidance:
+- UI must be staff-only and should validate an `event_id` is selected.
+- For large files, use `begin_at`/`end_at` to process in chunks.
+- Prefer `return_detail=false` for large imports to reduce payload size.
+
+Common errors:
+- `403` — missing/invalid account context or API key.
+- `404` — event not found.
+- `500` — file save or processing error.
+
+Example curl (replace placeholders):
+```bash
+curl -v -X POST "https://api.example.com/event/<EVENT_ID>/badge/import/zoom_csv?begin_at=0&end_at=20000&return_detail=false" \
+  -H "x-aether-api-key: <API_KEY>" \
+  -H "x-account-id: <ACCOUNT_ID>" \
+  -F "file=@/path/to/zoom_export.csv"
+```
+
+Sample success (summary mode, `return_detail=false`):
+```json
+{
+  "data": [
+    {
+      "event_id": "xK9mP3qRtL2",
+      "event_id_random": "xK9mP3qRtL2",
+      "external_id": "alice@example.com",
+      "given_name": "Alice",
+      "family_name": "Smith",
+      "email": "alice@example.com"
+    }
+  ],
+  "meta": {
+    "status_code": 200,
+    "status_name": "OK",
+    "success": true,
+    "data_type": "list",
+    "data_list_count": 1
+  }
+}
+```
+
+Sample success (detailed, `return_detail=true`) — `data` contains full `event_person` objects with nested `event_badge` (may include temporary `event_badge_template_id`: `21` and `event_badge_template_id_random`: `RKYp2HcQm9o`).
+
+Paste this section into the guide as a temporary Axonius-specific note (April 2026). Consider linking staff to a sample Zoom CSV for QA.
+
+---
+
 ## 7. User Actions (`/v3/action/user/`)
 
 Stateful user account operations that are not standard CRUD. All require `x-aether-api-key`.