diff --git a/plugins/grpc-ecosystem/openapiv3/source.yaml b/plugins/grpc-ecosystem/openapiv3/source.yaml
new file mode 100644
index 000000000..e28f7df43
--- /dev/null
+++ b/plugins/grpc-ecosystem/openapiv3/source.yaml
@@ -0,0 +1,4 @@
+source:
+  github:
+    owner: grpc-ecosystem
+    repository: grpc-gateway
diff --git a/plugins/grpc-ecosystem/openapiv3/v2.30.0/.dockerignore b/plugins/grpc-ecosystem/openapiv3/v2.30.0/.dockerignore
new file mode 100644
index 000000000..5d0f124ff
--- /dev/null
+++ b/plugins/grpc-ecosystem/openapiv3/v2.30.0/.dockerignore
@@ -0,0 +1,2 @@
+*
+!Dockerfile
diff --git a/plugins/grpc-ecosystem/openapiv3/v2.30.0/Dockerfile b/plugins/grpc-ecosystem/openapiv3/v2.30.0/Dockerfile
new file mode 100644
index 000000000..aff8dd8aa
--- /dev/null
+++ b/plugins/grpc-ecosystem/openapiv3/v2.30.0/Dockerfile
@@ -0,0 +1,15 @@
+# syntax=docker/dockerfile:1.24
+FROM --platform=$BUILDPLATFORM golang:1.26.6-trixie@sha256:b75d466dd608587fd66cca705a307ba65b889827d06ad61d6a75f0482b51b7c7 AS build
+
+ARG TARGETOS TARGETARCH
+ENV CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH
+
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go install -ldflags="-s -w" -trimpath github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv3@v2.30.0 \
+ && mv /go/bin/${GOOS}_${GOARCH}/protoc-gen-openapiv3 /go/bin/protoc-gen-openapiv3 || true
+
+FROM scratch
+COPY --from=build --link --chown=root:root /etc/passwd /etc/passwd
+COPY --from=build --link /go/bin/protoc-gen-openapiv3 /
+USER nobody
+ENTRYPOINT [ "/protoc-gen-openapiv3" ]
diff --git a/plugins/grpc-ecosystem/openapiv3/v2.30.0/buf.plugin.yaml b/plugins/grpc-ecosystem/openapiv3/v2.30.0/buf.plugin.yaml
new file mode 100644
index 000000000..0f8eeda55
--- /dev/null
+++ b/plugins/grpc-ecosystem/openapiv3/v2.30.0/buf.plugin.yaml
@@ -0,0 +1,7 @@
+version: v1
+name: buf.build/grpc-ecosystem/openapiv3
+plugin_version: v2.30.0
+source_url: https://github.com/grpc-ecosystem/grpc-gateway
+description: Generates OpenAPI v3 definitions for Protobuf services.
+spdx_license_id: BSD-3-Clause
+license_url: https://github.com/grpc-ecosystem/grpc-gateway/blob/v2.30.0/LICENSE
diff --git a/tests/plugins_test.go b/tests/plugins_test.go
index 9599db08a..cbf6a0fc9 100644
--- a/tests/plugins_test.go
+++ b/tests/plugins_test.go
@@ -89,6 +89,7 @@ exec docker run --log-driver=none --rm -i {{.ImageName}}:{{.Version}} "$@"
 	allowedEmptyPluginSums = map[string]map[string]bool{
 		"buf.build/bufbuild/validate-java":            {"eliza": true, "petapis": true},
 		"buf.build/grpc-ecosystem/gateway":            {"eliza": true, "petapis": true},
+		"buf.build/grpc-ecosystem/openapiv3":          {"eliza": true, "petapis": true},
 		"buf.build/community/mercari-grpc-federation": {"eliza": true, "petapis": true},
 		"buf.build/googlecloudplatform/bq-schema":     {"eliza": true, "petapis": true},
 	}
@@ -154,6 +155,8 @@ func TestGeneration(t *testing.T) {
 				if semver.Compare(toTest.PluginVersion, "v2.16.0") >= 0 {
 					testPluginWithImage(t, toTest, "grpc-gateway")
 				}
+			case "grpc-ecosystem/openapiv3":
+				testPluginWithImage(t, toTest, "grpc-gateway")
 			case "community/mercari-grpc-federation":
 				switch {
 				case semver.Compare(toTest.PluginVersion, "v1.4.1") >= 0:
diff --git a/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/eliza/plugin.sum b/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/eliza/plugin.sum
new file mode 100644
index 000000000..7d9c0f31d
--- /dev/null
+++ b/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/eliza/plugin.sum
@@ -0,0 +1 @@
+h1:47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=
diff --git a/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/grpc-gateway/plugin.sum b/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/grpc-gateway/plugin.sum
new file mode 100644
index 000000000..fa6459519
--- /dev/null
+++ b/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/grpc-gateway/plugin.sum
@@ -0,0 +1 @@
+h1:sDv/LdN7stRRvSCZnvvCnl7pXGppD04NgjjsDGgKboY=
diff --git a/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/petapis/plugin.sum b/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/petapis/plugin.sum
new file mode 100644
index 000000000..7d9c0f31d
--- /dev/null
+++ b/tests/testdata/buf.build/grpc-ecosystem/openapiv3/v2.30.0/petapis/plugin.sum
@@ -0,0 +1 @@
+h1:47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=