diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 446aca9c..cdaf0431 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -155,6 +155,11 @@ jobs:
               --api server-server \
               -r "$RELEASE" \
               -o spec/server-server-api/api.json
+          scripts/dump-openapi.py \
+              --base-url "https://spec.matrix.org${{ needs.calculate-baseurl.outputs.baseURL }}" \
+              --api identity \
+              -r "$RELEASE" \
+              -o spec/identity-service-api/api.json
           tar -czf openapi.tar.gz spec
       - name: "📤 Artifact upload"
         uses: actions/upload-artifact@v4
diff --git a/changelogs/internal/newsfragments/2172.clarification b/changelogs/internal/newsfragments/2172.clarification
new file mode 100644
index 00000000..53f01c68
--- /dev/null
+++ b/changelogs/internal/newsfragments/2172.clarification
@@ -0,0 +1 @@
+GitHub actions are now building the OpenAPI `spec/identity-service-api/api.json` file.