diff --git a/docs/reference/openapi.yaml b/docs/reference/openapi.yaml
index 0fd408fa1e..7dbf3da566 100644
--- a/docs/reference/openapi.yaml
+++ b/docs/reference/openapi.yaml
@@ -1104,6 +1104,42 @@ paths:
         "502":
           description: All upstream providers failed
 
+  /api/v1/ws:
+    get:
+      tags: [Chat]
+      summary: Chat completion over WebSocket (handshake + upgrade)
+      description: >-
+        OpenAI-compatible chat over a WebSocket connection. `GET` with
+        `?handshake=1` returns the connection descriptor (auth path, message
+        protocol and live-event channels) as JSON; a plain `GET` without an
+        Upgrade returns `426 Upgrade Required`. After upgrading, the client
+        exchanges JSON frames — `{type:"request", id, payload:{model, messages}}`
+        to start a completion and `{type:"cancel", id}` to abort it. A separate
+        live channel (default port `LIVE_WS_PORT=20129`, path `/live`) streams
+        dashboard events on the `requests`, `combo` and `credentials` topics with
+        a 15s heartbeat. Requires an API key.
+      security:
+        - BearerAuth: []
+      parameters:
+        - name: handshake
+          in: query
+          description: Set to `1` to receive the JSON connection descriptor instead of upgrading.
+          required: false
+          schema:
+            type: string
+            enum: ["1"]
+      responses:
+        "101":
+          description: WebSocket upgrade successful
+        "200":
+          description: Handshake descriptor (auth path, message protocol, live channels)
+        "401":
+          description: WebSocket auth required (no credential supplied)
+        "403":
+          description: Invalid WebSocket credential
+        "426":
+          description: Upgrade Required — connect via WebSocket or use `?handshake=1`
+
   /api/v1/providers/{provider}/chat/completions:
     post:
       tags: [Chat]
diff --git a/tests/unit/openapi-ws-endpoint.test.ts b/tests/unit/openapi-ws-endpoint.test.ts
new file mode 100644
index 0000000000..a6d4efc055
--- /dev/null
+++ b/tests/unit/openapi-ws-endpoint.test.ts
@@ -0,0 +1,32 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import yaml from "js-yaml";
+
+// Regression guard: the OpenAI-compatible chat WebSocket endpoint (/api/v1/ws)
+// must be documented in openapi.yaml so it shows up on the dashboard's
+// "API Endpoints" page (which renders /api/openapi/spec, parsed from this file).
+// The route (src/app/api/v1/ws/route.ts) shipped in v3.6.6 but was never listed
+// in the spec, so it was invisible in the endpoints reference.
+
+const ROOT = fileURLToPath(new URL("../../", import.meta.url));
+const spec = yaml.load(readFileSync(ROOT + "docs/reference/openapi.yaml", "utf8")) as {
+  paths: Record<string, Record<string, { tags?: string[]; security?: unknown[]; responses?: Record<string, unknown> }>>;
+};
+
+test("openapi.yaml documents the /api/v1/ws chat WebSocket endpoint", () => {
+  const entry = spec.paths["/api/v1/ws"];
+  assert.ok(entry, "/api/v1/ws must be present in openapi.yaml paths");
+  assert.ok(entry.get, "/api/v1/ws must document the GET (handshake/upgrade) operation");
+});
+
+test("/api/v1/ws is tagged, authenticated and documents the WS upgrade responses", () => {
+  const op = spec.paths["/api/v1/ws"].get;
+  assert.ok((op.tags ?? []).length > 0, "should be tagged so it groups on the endpoints page");
+  assert.ok(Array.isArray(op.security) && op.security.length > 0, "should require auth (BearerAuth)");
+  const responses = op.responses ?? {};
+  for (const code of ["101", "426"]) {
+    assert.ok(code in responses, `should document the ${code} WebSocket response`);
+  }
+});