diff --git a/containers/api-proxy/providers/gemini.js b/containers/api-proxy/providers/gemini.js
index 23db14ad0..8b39a3253 100644
--- a/containers/api-proxy/providers/gemini.js
+++ b/containers/api-proxy/providers/gemini.js
@@ -15,7 +15,7 @@
  * All configuration lives in GOOGLE_PROVIDER_SPECS.gemini (google-provider-specs.js).
  */
 
-const { createGoogleProviderAdapter } = require('./google-adapter');
+const { makeGoogleProviderFactory } = require('./google-adapter');
 
 /**
  * Create the Google Gemini provider adapter.
@@ -24,6 +24,6 @@ const { createGoogleProviderAdapter } = require('./google-adapter');
  * @param {{ bodyTransform?: ((body: Buffer) => (Buffer | null | Promise<Buffer | null>))|null }} [deps={}] - Injected dependencies
  * @returns {import('./index').ProviderAdapter}
  */
-const createGeminiAdapter = createGoogleProviderAdapter.bind(null, 'gemini');
+const createGeminiAdapter = makeGoogleProviderFactory('gemini');
 
 module.exports = { createGeminiAdapter };
diff --git a/containers/api-proxy/providers/google-adapter.js b/containers/api-proxy/providers/google-adapter.js
index d82a51465..1cd51cbf9 100644
--- a/containers/api-proxy/providers/google-adapter.js
+++ b/containers/api-proxy/providers/google-adapter.js
@@ -126,4 +126,14 @@ function createGoogleProviderAdapter(providerKey, env, deps = {}) {
   });
 }
 
-module.exports = { createGoogleApiKeyAdapter, createGoogleProviderAdapter };
+/**
+ * Create a named Google provider adapter factory.
+ *
+ * @param {string} providerKey - Key into GOOGLE_PROVIDER_SPECS (e.g. 'gemini')
+ * @returns {(env: Record<string, string|undefined>, deps?: { bodyTransform?: ((body: Buffer) => (Buffer | null | Promise<Buffer | null>))|null }) => import('./index').ProviderAdapter}
+ */
+function makeGoogleProviderFactory(providerKey) {
+  return (env, deps = {}) => createGoogleProviderAdapter(providerKey, env, deps);
+}
+
+module.exports = { createGoogleApiKeyAdapter, createGoogleProviderAdapter, makeGoogleProviderFactory };
diff --git a/containers/api-proxy/providers/google-adapter.test.js b/containers/api-proxy/providers/google-adapter.test.js
index 7406ed86d..6cf84e7c3 100644
--- a/containers/api-proxy/providers/google-adapter.test.js
+++ b/containers/api-proxy/providers/google-adapter.test.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const { createGoogleProviderAdapter } = require('./google-adapter');
+const { createGoogleProviderAdapter, makeGoogleProviderFactory } = require('./google-adapter');
 const { GOOGLE_PROVIDER_SPECS } = require('./google-provider-specs');
 const { createGeminiAdapter } = require('./gemini');
 const { createVertexAdapter } = require('./vertex');
@@ -10,6 +10,13 @@ describe('createGoogleProviderAdapter', () => {
     expect(() => createGoogleProviderAdapter('bogus', {})).toThrow(/Unknown Google provider spec: bogus/);
   });
 
+  it('creates reusable provider factories from provider keys', () => {
+    const createGemini = makeGoogleProviderFactory('gemini');
+    expect(createGemini({ GEMINI_API_KEY: 'key' }).getAuthHeaders()).toEqual({
+      'x-goog-api-key': 'key',
+    });
+  });
+
   it('derives gemini ports, targets and messages from the spec', () => {
     const adapter = createGoogleProviderAdapter('gemini', {});
     expect(adapter.name).toBe('gemini');
diff --git a/containers/api-proxy/providers/vertex.js b/containers/api-proxy/providers/vertex.js
index 21056b2d2..43c86fc44 100644
--- a/containers/api-proxy/providers/vertex.js
+++ b/containers/api-proxy/providers/vertex.js
@@ -17,7 +17,7 @@
  * All configuration lives in GOOGLE_PROVIDER_SPECS.vertex (google-provider-specs.js).
  */
 
-const { createGoogleProviderAdapter } = require('./google-adapter');
+const { makeGoogleProviderFactory } = require('./google-adapter');
 
 /**
  * Create the Google Vertex AI provider adapter.
@@ -26,6 +26,6 @@ const { createGoogleProviderAdapter } = require('./google-adapter');
  * @param {{ bodyTransform?: ((body: Buffer) => (Buffer | null | Promise<Buffer | null>))|null }} [deps={}] - Injected dependencies
  * @returns {import('./index').ProviderAdapter}
  */
-const createVertexAdapter = createGoogleProviderAdapter.bind(null, 'vertex');
+const createVertexAdapter = makeGoogleProviderFactory('vertex');
 
 module.exports = { createVertexAdapter };