diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0495091d633..d5496b9aaac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ Docs: https://docs.openclaw.ai
 ### Fixes
 
 - Exec/YOLO: stop rejecting gateway-host exec in `security=full` plus `ask=off` mode via the Python/Node script preflight hardening path, so promptless YOLO exec once again runs direct interpreter stdin and heredoc forms such as `node <<'NODE' ... NODE`.
+- Anthropic/plugins: scope Anthropic `api: "anthropic-messages"` defaulting to Anthropic-owned providers, so `openai-codex` and other providers without an explicit `api` no longer get rewritten to the wrong transport. Fixes #64534.
 - fix(qqbot): add SSRF guard to direct-upload URL paths in uploadC2CMedia and uploadGroupMedia [AI-assisted]. (#69595) Thanks @pgondhi987.
 - fix(gateway): enforce allowRequestSessionKey gate on template-rendered mapping sessionKeys. (#69381) Thanks @pgondhi987.
 - Webchat/images: treat inline image attachments as media for empty-turn gating while still ignoring metadata-only blank turns. (#69474) Thanks @Jaswir.
diff --git a/extensions/anthropic/config-defaults.ts b/extensions/anthropic/config-defaults.ts
index ddad9dd5829..201263b6699 100644
--- a/extensions/anthropic/config-defaults.ts
+++ b/extensions/anthropic/config-defaults.ts
@@ -159,6 +159,16 @@ export function normalizeAnthropicProviderConfig<T extends { api?: string; model
   return { ...providerConfig, api: ANTHROPIC_PROVIDER_API };
 }
 
+export function normalizeAnthropicProviderConfigForProvider<
+  T extends { api?: string; models?: unknown[] },
+>(params: { provider: string; providerConfig: T }): T {
+  const provider = normalizeProviderId(params.provider);
+  if (provider !== "anthropic" && provider !== CLAUDE_CLI_BACKEND_ID) {
+    return params.providerConfig;
+  }
+  return normalizeAnthropicProviderConfig(params.providerConfig);
+}
+
 export function applyAnthropicConfigDefaults(params: {
   config: OpenClawConfig;
   env: NodeJS.ProcessEnv;
diff --git a/extensions/anthropic/index.test.ts b/extensions/anthropic/index.test.ts
index fe4453c9044..2371394c4c5 100644
--- a/extensions/anthropic/index.test.ts
+++ b/extensions/anthropic/index.test.ts
@@ -100,6 +100,36 @@ describe("anthropic provider replay hooks", () => {
     });
   });
 
+  it("defaults Claude CLI provider api through plugin config normalization", async () => {
+    const provider = await registerSingleProviderPlugin(anthropicPlugin);
+
+    expect(
+      provider.normalizeConfig?.({
+        provider: "claude-cli",
+        providerConfig: {
+          models: [{ id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" }],
+        },
+      } as never),
+    ).toMatchObject({
+      api: "anthropic-messages",
+    });
+  });
+
+  it("does not default non-Anthropic provider api through plugin config normalization", async () => {
+    const provider = await registerSingleProviderPlugin(anthropicPlugin);
+    const providerConfig = {
+      baseUrl: "https://chatgpt.com/backend-api/codex",
+      models: [{ id: "gpt-5.4", name: "GPT-5.4" }],
+    };
+
+    expect(
+      provider.normalizeConfig?.({
+        provider: "openai-codex",
+        providerConfig,
+      } as never),
+    ).toBe(providerConfig);
+  });
+
   it("applies Anthropic pruning defaults through plugin hooks", async () => {
     const provider = await registerSingleProviderPlugin(anthropicPlugin);
 
diff --git a/extensions/anthropic/provider-policy-api.test.ts b/extensions/anthropic/provider-policy-api.test.ts
index daa6b84b29b..b1beddbcaf8 100644
--- a/extensions/anthropic/provider-policy-api.test.ts
+++ b/extensions/anthropic/provider-policy-api.test.ts
@@ -35,6 +35,34 @@ describe("anthropic provider policy public artifact", () => {
     });
   });
 
+  it("normalizes Claude CLI provider config", () => {
+    expect(
+      normalizeConfig({
+        provider: "claude-cli",
+        providerConfig: {
+          baseUrl: "https://api.anthropic.com",
+          models: [createModel("claude-sonnet-4-6", "Claude Sonnet 4.6")],
+        },
+      }),
+    ).toMatchObject({
+      api: "anthropic-messages",
+    });
+  });
+
+  it("does not normalize non-Anthropic provider config", () => {
+    const providerConfig = {
+      baseUrl: "https://chatgpt.com/backend-api/codex",
+      models: [createModel("gpt-5.4", "GPT-5.4")],
+    };
+
+    expect(
+      normalizeConfig({
+        provider: "openai-codex",
+        providerConfig,
+      }),
+    ).toBe(providerConfig);
+  });
+
   it("applies Anthropic API-key defaults without loading the full provider plugin", () => {
     const nextConfig = applyConfigDefaults({
       config: {
diff --git a/extensions/anthropic/provider-policy-api.ts b/extensions/anthropic/provider-policy-api.ts
index 21e25abf660..912ad48810c 100644
--- a/extensions/anthropic/provider-policy-api.ts
+++ b/extensions/anthropic/provider-policy-api.ts
@@ -1,11 +1,11 @@
 import type { ModelProviderConfig } from "openclaw/plugin-sdk/provider-model-types";
 import {
   applyAnthropicConfigDefaults,
-  normalizeAnthropicProviderConfig,
+  normalizeAnthropicProviderConfigForProvider,
 } from "./config-defaults.js";
 
 export function normalizeConfig(params: { provider: string; providerConfig: ModelProviderConfig }) {
-  return normalizeAnthropicProviderConfig(params.providerConfig);
+  return normalizeAnthropicProviderConfigForProvider(params);
 }
 
 export function applyConfigDefaults(params: Parameters<typeof applyAnthropicConfigDefaults>[0]) {
diff --git a/extensions/anthropic/register.runtime.ts b/extensions/anthropic/register.runtime.ts
index e695f2870cd..cfc870484de 100644
--- a/extensions/anthropic/register.runtime.ts
+++ b/extensions/anthropic/register.runtime.ts
@@ -34,7 +34,7 @@ import {
 } from "./cli-shared.js";
 import {
   applyAnthropicConfigDefaults,
-  normalizeAnthropicProviderConfig,
+  normalizeAnthropicProviderConfigForProvider,
 } from "./config-defaults.js";
 import { anthropicMediaUnderstandingProvider } from "./media-understanding-provider.js";
 import { buildAnthropicReplayPolicy } from "./replay-policy.js";
@@ -483,7 +483,8 @@ export function buildAnthropicProvider(): ProviderPlugin {
         },
       }),
     ],
-    normalizeConfig: ({ providerConfig }) => normalizeAnthropicProviderConfig(providerConfig),
+    normalizeConfig: ({ provider, providerConfig }) =>
+      normalizeAnthropicProviderConfigForProvider({ provider, providerConfig }),
     applyConfigDefaults: ({ config, env }) => applyAnthropicConfigDefaults({ config, env }),
     resolveDynamicModel: (ctx) => resolveAnthropicForwardCompatModel(ctx),
     resolveSyntheticAuth: ({ provider }) =>