diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f5c74cc491..6f88d299f45 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -219,6 +219,7 @@ Docs: https://docs.openclaw.ai
 - Agents/usage normalization: normalize missing or partial assistant usage snapshots before compaction accounting so `openclaw agent --json` no longer crashes when provider payloads omit `totalTokens` or related usage fields. (#34977) thanks @sp-hk2ldn.
 - Venice/default model refresh: switch the built-in Venice default to `kimi-k2-5`, update onboarding aliasing, and refresh Venice provider docs/recommendations to match the current private and anonymized catalog. (from #12964) Fixes #20156. Thanks @sabrinaaquino and @vincentkoc.
 - Agents/skill API write pacing: add a global prompt guardrail that treats skill-driven external API writes as rate-limited by default, so runners prefer batched writes, avoid tight request loops, and respect `429`/`Retry-After`. Thanks @vincentkoc.
+- Google Chat/multi-account webhook auth fallback: when `channels.googlechat.accounts.default` carries shared webhook audience/path settings (for example after config normalization), inherit those defaults for named accounts while preserving top-level and per-account overrides, so inbound webhook verification no longer fails silently for named accounts missing duplicated audience fields. Fixes #38369.
 
 ## 2026.3.2
 
diff --git a/extensions/googlechat/src/accounts.test.ts b/extensions/googlechat/src/accounts.test.ts
new file mode 100644
index 00000000000..18256688971
--- /dev/null
+++ b/extensions/googlechat/src/accounts.test.ts
@@ -0,0 +1,131 @@
+import type { OpenClawConfig } from "openclaw/plugin-sdk/googlechat";
+import { describe, expect, it } from "vitest";
+import { resolveGoogleChatAccount } from "./accounts.js";
+
+describe("resolveGoogleChatAccount", () => {
+  it("inherits shared defaults from accounts.default for named accounts", () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        googlechat: {
+          accounts: {
+            default: {
+              audienceType: "app-url",
+              audience: "https://example.com/googlechat",
+              webhookPath: "/googlechat",
+            },
+            andy: {
+              serviceAccountFile: "/tmp/andy-sa.json",
+            },
+          },
+        },
+      },
+    };
+
+    const resolved = resolveGoogleChatAccount({ cfg, accountId: "andy" });
+    expect(resolved.config.audienceType).toBe("app-url");
+    expect(resolved.config.audience).toBe("https://example.com/googlechat");
+    expect(resolved.config.webhookPath).toBe("/googlechat");
+    expect(resolved.config.serviceAccountFile).toBe("/tmp/andy-sa.json");
+  });
+
+  it("prefers top-level and account overrides over accounts.default", () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        googlechat: {
+          audienceType: "project-number",
+          audience: "1234567890",
+          accounts: {
+            default: {
+              audienceType: "app-url",
+              audience: "https://default.example.com/googlechat",
+              webhookPath: "/googlechat-default",
+            },
+            april: {
+              webhookPath: "/googlechat-april",
+            },
+          },
+        },
+      },
+    };
+
+    const resolved = resolveGoogleChatAccount({ cfg, accountId: "april" });
+    expect(resolved.config.audienceType).toBe("project-number");
+    expect(resolved.config.audience).toBe("1234567890");
+    expect(resolved.config.webhookPath).toBe("/googlechat-april");
+  });
+
+  it("does not inherit disabled state from accounts.default for named accounts", () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        googlechat: {
+          accounts: {
+            default: {
+              enabled: false,
+              audienceType: "app-url",
+              audience: "https://example.com/googlechat",
+            },
+            andy: {
+              serviceAccountFile: "/tmp/andy-sa.json",
+            },
+          },
+        },
+      },
+    };
+
+    const resolved = resolveGoogleChatAccount({ cfg, accountId: "andy" });
+    expect(resolved.enabled).toBe(true);
+    expect(resolved.config.enabled).toBeUndefined();
+    expect(resolved.config.audienceType).toBe("app-url");
+  });
+
+  it("does not inherit default-account credentials into named accounts", () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        googlechat: {
+          accounts: {
+            default: {
+              serviceAccountRef: {
+                source: "env",
+                provider: "test",
+                id: "default-sa",
+              },
+              audienceType: "app-url",
+              audience: "https://example.com/googlechat",
+            },
+            andy: {
+              serviceAccountFile: "/tmp/andy-sa.json",
+            },
+          },
+        },
+      },
+    };
+
+    const resolved = resolveGoogleChatAccount({ cfg, accountId: "andy" });
+    expect(resolved.credentialSource).toBe("file");
+    expect(resolved.credentialsFile).toBe("/tmp/andy-sa.json");
+    expect(resolved.config.audienceType).toBe("app-url");
+  });
+
+  it("does not inherit dangerous name matching from accounts.default", () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        googlechat: {
+          accounts: {
+            default: {
+              dangerouslyAllowNameMatching: true,
+              audienceType: "app-url",
+              audience: "https://example.com/googlechat",
+            },
+            andy: {
+              serviceAccountFile: "/tmp/andy-sa.json",
+            },
+          },
+        },
+      },
+    };
+
+    const resolved = resolveGoogleChatAccount({ cfg, accountId: "andy" });
+    expect(resolved.config.dangerouslyAllowNameMatching).toBeUndefined();
+    expect(resolved.config.audienceType).toBe("app-url");
+  });
+});
diff --git a/extensions/googlechat/src/accounts.ts b/extensions/googlechat/src/accounts.ts
index 537c898d77e..f597efbece4 100644
--- a/extensions/googlechat/src/accounts.ts
+++ b/extensions/googlechat/src/accounts.ts
@@ -71,8 +71,22 @@ function mergeGoogleChatAccountConfig(
 ): GoogleChatAccountConfig {
   const raw = cfg.channels?.["googlechat"] ?? {};
   const { accounts: _ignored, defaultAccount: _ignored2, ...base } = raw;
+  const defaultAccountConfig = resolveAccountConfig(cfg, DEFAULT_ACCOUNT_ID) ?? {};
   const account = resolveAccountConfig(cfg, accountId) ?? {};
-  return { ...base, ...account } as GoogleChatAccountConfig;
+  if (accountId === DEFAULT_ACCOUNT_ID) {
+    return { ...base, ...defaultAccountConfig } as GoogleChatAccountConfig;
+  }
+  const {
+    enabled: _ignoredEnabled,
+    dangerouslyAllowNameMatching: _ignoredDangerouslyAllowNameMatching,
+    serviceAccount: _ignoredServiceAccount,
+    serviceAccountRef: _ignoredServiceAccountRef,
+    serviceAccountFile: _ignoredServiceAccountFile,
+    ...defaultAccountShared
+  } = defaultAccountConfig;
+  // In multi-account setups, allow accounts.default to provide shared defaults
+  // (for example webhook/audience fields) while preserving top-level and account overrides.
+  return { ...defaultAccountShared, ...base, ...account } as GoogleChatAccountConfig;
 }
 
 function parseServiceAccount(value: unknown): Record<string, unknown> | null {