diff --git a/extensions/minimax/openclaw.plugin.json b/extensions/minimax/openclaw.plugin.json
index 211a25ac72c..9484fe65fb4 100644
--- a/extensions/minimax/openclaw.plugin.json
+++ b/extensions/minimax/openclaw.plugin.json
@@ -6,7 +6,7 @@
   "autoEnableWhenConfiguredProviders": ["minimax", "minimax-portal"],
   "nonSecretAuthMarkers": ["minimax-oauth"],
   "providerAuthEnvVars": {
-    "minimax": ["MINIMAX_API_KEY"],
+    "minimax": ["MINIMAX_CODE_PLAN_KEY", "MINIMAX_CODING_API_KEY", "MINIMAX_API_KEY"],
     "minimax-portal": ["MINIMAX_OAUTH_TOKEN", "MINIMAX_API_KEY"]
   },
   "providerAuthChoices": [
diff --git a/src/infra/provider-usage.auth.plugin.test.ts b/src/infra/provider-usage.auth.plugin.test.ts
index 93380d99f75..4cc79ee4235 100644
--- a/src/infra/provider-usage.auth.plugin.test.ts
+++ b/src/infra/provider-usage.auth.plugin.test.ts
@@ -263,6 +263,37 @@ describe("resolveProviderAuths plugin boundary", () => {
     expect(ensureAuthProfileStoreMock).not.toHaveBeenCalled();
   });
 
+  it("keeps plugin usage auth when provider-owned usage env credentials exist", async () => {
+    resolveProviderUsageAuthWithPluginMock.mockResolvedValueOnce({
+      token: "plugin-minimax-token",
+    });
+
+    await withTempHome(async (homeDir) => {
+      await expect(
+        resolveProviderAuths({
+          providers: ["minimax"],
+          skipPluginAuthWithoutCredentialSource: true,
+          env: {
+            HOME: homeDir,
+            MINIMAX_CODE_PLAN_KEY: "code-plan-key",
+          },
+        }),
+      ).resolves.toEqual([
+        {
+          provider: "minimax",
+          token: "plugin-minimax-token",
+        },
+      ]);
+    });
+
+    expect(resolveProviderUsageAuthWithPluginMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        provider: "minimax",
+      }),
+    );
+    expect(ensureAuthProfileStoreMock).not.toHaveBeenCalled();
+  });
+
   it("does not overlay external auth profiles while checking the skip gate", async () => {
     hasAnyAuthProfileStoreSourceMock.mockReturnValue(true);
 
diff --git a/src/secrets/provider-env-vars.ts b/src/secrets/provider-env-vars.ts
index c8dc009dd95..dd7e8deb32d 100644
--- a/src/secrets/provider-env-vars.ts
+++ b/src/secrets/provider-env-vars.ts
@@ -210,8 +210,6 @@ export function getProviderEnvVars(
   return Array.isArray(envVars) ? [...envVars] : [];
 }
 
-const EXTRA_PROVIDER_AUTH_ENV_VARS = ["MINIMAX_CODE_PLAN_KEY", "MINIMAX_CODING_API_KEY"] as const;
-
 // OPENCLAW_API_KEY authenticates the local OpenClaw bridge itself and must
 // remain available to child bridge/runtime processes.
 export function listKnownProviderAuthEnvVarNames(params?: ProviderEnvVarLookupParams): string[] {
@@ -219,7 +217,6 @@ export function listKnownProviderAuthEnvVarNames(params?: ProviderEnvVarLookupPa
     ...new Set([
       ...Object.values(resolveProviderAuthEnvVarCandidates(params)).flatMap((keys) => keys),
       ...Object.values(resolveProviderEnvVars(params)).flatMap((keys) => keys),
-      ...EXTRA_PROVIDER_AUTH_ENV_VARS,
     ]),
   ];
 }