diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e75cc15f4e..24223d1d8d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -68,6 +68,7 @@ Docs: https://docs.openclaw.ai
 - Plugins/externalization: keep official external install docs, update examples, and live Codex npm checks on default npm tags instead of `@beta`. Thanks @vincentkoc.
 - Plugins/externalization: keep ACPX, Google Chat, and LINE publishable plugin dist trees out of the core npm package file list.
 - Plugins/ClawHub: fall back to version metadata when the artifact resolver route is missing and keep the Docker ClawHub fixture aligned with npm-pack artifact resolution, avoiding false version-not-found failures during plugin install validation. Thanks @vincentkoc.
+- Providers/openai-codex: honor `providerConfig.baseUrl` in the dynamic-model synthesis fallback so codex providers configured with a custom upstream (for example a forwarding proxy) no longer silently bypass the configured URL when the registry has no template row to clone for the requested model id. (#76428) Thanks @arniesaha.
 - Status/channels: show configured channels in `openclaw status` and config-only `openclaw channels status` output even when the Gateway is unreachable, avoiding empty Channels tables on WSL and other no-Gateway paths. Thanks @vincentkoc.
 - Plugins/ClawHub: explain unavailable explicit ClawHub ClawPack artifact downloads with a temporary npm install hint while ClawHub artifact routing rolls out. Thanks @vincentkoc.
 - Media: accept home-relative `MEDIA:~/...` attachment paths while preserving existing file-read policy, traversal checks, and media type validation. Fixes #73796. Thanks @fabkury.
diff --git a/extensions/openai/openai-codex-provider.test.ts b/extensions/openai/openai-codex-provider.test.ts
index c74085b83e6..75965a61041 100644
--- a/extensions/openai/openai-codex-provider.test.ts
+++ b/extensions/openai/openai-codex-provider.test.ts
@@ -405,6 +405,43 @@ describe("openai codex provider", () => {
     });
   });
 
+  it("honors providerConfig.baseUrl in the gpt-5.5 synthesis fallback", () => {
+    const provider = buildOpenAICodexProviderPlugin();
+
+    const model = provider.resolveDynamicModel?.({
+      provider: "openai-codex",
+      modelId: "gpt-5.5",
+      modelRegistry: createSingleModelRegistry(createCodexTemplate({}), null) as never,
+      providerConfig: { baseUrl: "http://proxy.local:30400" },
+    });
+
+    expect(model).toMatchObject({
+      id: "gpt-5.5",
+      api: "openai-codex-responses",
+      baseUrl: "http://proxy.local:30400",
+    });
+  });
+
+  it("honors providerConfig.baseUrl in the gpt-5.4 synthesis fallback", () => {
+    const provider = buildOpenAICodexProviderPlugin();
+    const emptyRegistry = { find: () => null };
+
+    const model = provider.resolveDynamicModel?.({
+      provider: "openai-codex",
+      modelId: "gpt-5.4",
+      modelRegistry: emptyRegistry as never,
+      providerConfig: { baseUrl: "http://proxy.local:30400" },
+    });
+
+    expect(model).toMatchObject({
+      id: "gpt-5.4",
+      api: "openai-codex-responses",
+      baseUrl: "http://proxy.local:30400",
+      contextWindow: 1_050_000,
+      maxTokens: 128_000,
+    });
+  });
+
   it("resolves gpt-5.4-pro from a gpt-5.4 runtime template when legacy codex rows are absent", () => {
     const provider = buildOpenAICodexProviderPlugin();
 
diff --git a/extensions/openai/openai-codex-provider.ts b/extensions/openai/openai-codex-provider.ts
index 462e5dbc2b7..4bbe2747e75 100644
--- a/extensions/openai/openai-codex-provider.ts
+++ b/extensions/openai/openai-codex-provider.ts
@@ -172,6 +172,7 @@ function normalizeCodexTransport(model: ProviderRuntimeModel): ProviderRuntimeMo
 function resolveCodexForwardCompatModel(ctx: ProviderResolveDynamicModelContext) {
   const trimmedModelId = ctx.modelId.trim();
   const lower = normalizeLowercaseStringOrEmpty(trimmedModelId);
+  const synthBaseUrl = ctx.providerConfig?.baseUrl ?? OPENAI_CODEX_BASE_URL;
 
   if (lower === OPENAI_CODEX_GPT_55_MODEL_ID) {
     const model = ctx.modelRegistry.find(PROVIDER_ID, trimmedModelId) as
@@ -188,7 +189,7 @@ function resolveCodexForwardCompatModel(ctx: ProviderResolveDynamicModelContext)
         name: trimmedModelId,
         api: "openai-codex-responses",
         provider: PROVIDER_ID,
-        baseUrl: OPENAI_CODEX_BASE_URL,
+        baseUrl: synthBaseUrl,
         reasoning: true,
         input: ["text", "image"],
         cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
@@ -264,7 +265,7 @@ function resolveCodexForwardCompatModel(ctx: ProviderResolveDynamicModelContext)
           : trimmedModelId,
       api: "openai-codex-responses",
       provider: PROVIDER_ID,
-      baseUrl: OPENAI_CODEX_BASE_URL,
+      baseUrl: synthBaseUrl,
       reasoning: true,
       input: ["text", "image"],
       cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },