diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40e1cdc9ee5..123388dc53f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,7 @@ Docs: https://docs.openclaw.ai
 - Slack/message actions: send media before the follow-up Block Kit message when Slack `send` includes a file plus presentation or interactive controls, so file attachments are no longer rejected. Fixes #51458. Thanks @HirokiKobayashi-R.
 - Slack/DMs: honor `dmHistoryLimit` for fresh 1:1 Slack DM sessions by backfilling recent conversation history before the current reply. Fixes #64427. Thanks @brantley-creator.
 - Slack/DMs: keep top-level direct messages on the stable DM session even when `replyToMode` targets Slack thread replies, preserving context across DM turns. Fixes #58832. Thanks @daye-jjeong.
+- Slack/delivery: preserve Slack Web API missing-scope details in outbound delivery errors, so queued retry state identifies the OAuth scope to add. Fixes #62391. Thanks @alexey-pelykh.
 - Slack/mentions: resolve `<!subteam^...>` user-group mentions through Slack `usergroups.users.list` and treat them as explicit mentions only when the bot user is a member, so mention-gated agent channels wake for real user-group mentions without config-only allowlists. Fixes #73827. Thanks @CG-Intelligence-Agent-Jack.
 - Slack/message tool: let `read` fetch an exact Slack message timestamp, including a specific thread reply when paired with `threadId`, instead of returning only the parent thread or recent channel history. Fixes #53943. Thanks @zomars.
 - Web search: point missing-key errors to `web_fetch` for known URLs and the browser tool for interactive pages. Thanks @zhaoyang97.
diff --git a/extensions/slack/src/send.identity-fallback.test.ts b/extensions/slack/src/send.identity-fallback.test.ts
index 0b421419eaf..1f6d1be5007 100644
--- a/extensions/slack/src/send.identity-fallback.test.ts
+++ b/extensions/slack/src/send.identity-fallback.test.ts
@@ -25,7 +25,7 @@ function buildMissingScopeError(overrides?: {
   scopes?: string[];
   acceptedScopes?: string[];
 }): SlackMissingScopeError {
-  const err = new Error("missing_scope") as SlackMissingScopeError;
+  const err = new Error("An API error occurred: missing_scope") as SlackMissingScopeError;
   const response_metadata =
     overrides?.scopes || overrides?.acceptedScopes
       ? {
@@ -131,7 +131,7 @@ describe("sendMessageSlack customize-scope fallback", () => {
         client,
         identity: { username: "Bot" },
       }),
-    ).rejects.toBe(err);
+    ).rejects.toThrow("An API error occurred: missing_scope (needed: channels:history)");
 
     expect(client.chat.postMessage).toHaveBeenCalledTimes(1);
     expect(vi.mocked(logVerbose)).not.toHaveBeenCalled();
@@ -148,9 +148,51 @@ describe("sendMessageSlack customize-scope fallback", () => {
         cfg: SLACK_TEST_CFG,
         client,
       }),
-    ).rejects.toBe(err);
+    ).rejects.toThrow("An API error occurred: missing_scope (needed: chat:write.customize)");
 
     expect(client.chat.postMessage).toHaveBeenCalledTimes(1);
     expect(vi.mocked(logVerbose)).not.toHaveBeenCalled();
   });
+
+  it("preserves Slack missing-scope details for delivery queue recovery", async () => {
+    const client = createSlackSendTestClient();
+    vi.mocked(client.chat.postMessage).mockRejectedValueOnce(
+      buildMissingScopeError({
+        needed: "im:write",
+        scopes: ["chat:write", "users:read"],
+        acceptedScopes: ["im:write", "mpim:write"],
+      }),
+    );
+
+    await expect(
+      sendMessageSlack("channel:C123", "hello", {
+        token: "xoxb-test",
+        cfg: SLACK_TEST_CFG,
+        client,
+      }),
+    ).rejects.toThrow(
+      "An API error occurred: missing_scope (needed: im:write; granted: chat:write, users:read; accepted: im:write, mpim:write)",
+    );
+  });
+
+  it("preserves Slack missing-scope details while opening DMs", async () => {
+    const client = createSlackSendTestClient();
+    vi.mocked(client.conversations.open).mockRejectedValueOnce(
+      buildMissingScopeError({
+        needed: "im:write",
+        scopes: ["chat:write"],
+      }),
+    );
+
+    await expect(
+      sendMessageSlack("user:U123", "hello", {
+        token: "xoxb-test",
+        cfg: SLACK_TEST_CFG,
+        client,
+      }),
+    ).rejects.toThrow(
+      "An API error occurred: missing_scope (needed: im:write; granted: chat:write)",
+    );
+    expect(client.chat.postMessage).not.toHaveBeenCalled();
+  });
 });
diff --git a/extensions/slack/src/send.ts b/extensions/slack/src/send.ts
index f790989449f..bec06cb5e06 100644
--- a/extensions/slack/src/send.ts
+++ b/extensions/slack/src/send.ts
@@ -70,32 +70,96 @@ type SlackSendOpts = {
   blocks?: (Block | KnownBlock)[];
 };
 
+type SlackWebApiErrorData = {
+  error?: unknown;
+  needed?: unknown;
+  response_metadata?: {
+    scopes?: unknown;
+    acceptedScopes?: unknown;
+  };
+};
+
+type SlackWebApiError = Error & {
+  data?: SlackWebApiErrorData;
+};
+
 function hasCustomIdentity(identity?: SlackSendIdentity): boolean {
   return Boolean(identity?.username || identity?.iconUrl || identity?.iconEmoji);
 }
 
-function isSlackCustomizeScopeError(err: unknown): boolean {
-  if (!(err instanceof Error)) {
-    return false;
+function normalizeSlackApiString(value: unknown): string | undefined {
+  return typeof value === "string" && value.trim() ? value.trim() : undefined;
+}
+
+function normalizeSlackScopeList(value: unknown): string[] {
+  if (!Array.isArray(value)) {
+    return [];
   }
-  const maybeData = err as Error & {
-    data?: {
-      error?: string;
-      needed?: string;
-      response_metadata?: { scopes?: string[]; acceptedScopes?: string[] };
-    };
-  };
-  const code = normalizeLowercaseStringOrEmpty(maybeData.data?.error);
+  return value.flatMap((scope) => {
+    const normalized = normalizeSlackApiString(scope);
+    return normalized ? [normalized] : [];
+  });
+}
+
+function getSlackWebApiErrorData(err: unknown): SlackWebApiErrorData | undefined {
+  if (!(err instanceof Error)) {
+    return undefined;
+  }
+  const data = (err as SlackWebApiError).data;
+  if (!data || typeof data !== "object") {
+    return undefined;
+  }
+  return data;
+}
+
+function formatSlackWebApiErrorMessage(err: unknown): string | undefined {
+  if (!(err instanceof Error)) {
+    return undefined;
+  }
+  const data = getSlackWebApiErrorData(err);
+  const code = normalizeSlackApiString(data?.error);
+  if (!code) {
+    return undefined;
+  }
+  const details: string[] = [];
+  const needed = normalizeSlackApiString(data?.needed);
+  if (needed) {
+    details.push(`needed: ${needed}`);
+  }
+  const scopes = normalizeSlackScopeList(data?.response_metadata?.scopes);
+  if (scopes.length) {
+    details.push(`granted: ${scopes.join(", ")}`);
+  }
+  const acceptedScopes = normalizeSlackScopeList(data?.response_metadata?.acceptedScopes);
+  if (acceptedScopes.length) {
+    details.push(`accepted: ${acceptedScopes.join(", ")}`);
+  }
+  return `${err.message || `An API error occurred: ${code}`}${
+    details.length ? ` (${details.join("; ")})` : ""
+  }`;
+}
+
+function enrichSlackWebApiError(err: unknown): unknown {
+  const message = formatSlackWebApiErrorMessage(err);
+  if (!message || !(err instanceof Error) || message === err.message) {
+    return err;
+  }
+  return new Error(message);
+}
+
+function isSlackCustomizeScopeError(err: unknown): boolean {
+  const data = getSlackWebApiErrorData(err);
+  const code = normalizeLowercaseStringOrEmpty(normalizeSlackApiString(data?.error));
   if (code !== "missing_scope") {
     return false;
   }
-  const needed = normalizeLowercaseStringOrEmpty(maybeData.data?.needed);
+  const needed = normalizeLowercaseStringOrEmpty(normalizeSlackApiString(data?.needed));
   if (needed?.includes("chat:write.customize")) {
     return true;
   }
   const scopes = [
-    ...(maybeData.data?.response_metadata?.scopes ?? []),
-    ...(maybeData.data?.response_metadata?.acceptedScopes ?? []),
+    ...normalizeSlackScopeList(data?.response_metadata?.scopes),
+    ...normalizeSlackScopeList(data?.response_metadata?.acceptedScopes),
   ].map((scope) => normalizeLowercaseStringOrEmpty(scope));
   return scopes.includes("chat:write.customize");
 }
@@ -401,6 +465,22 @@ async function sendMessageSlackQueued(params: {
   token: string;
   recipient: SlackRecipient;
   blocks?: (Block | KnownBlock)[];
+}): Promise<SlackSendResult> {
+  try {
+    return await sendMessageSlackQueuedInner(params);
+  } catch (err) {
+    throw enrichSlackWebApiError(err);
+  }
+}
+
+async function sendMessageSlackQueuedInner(params: {
+  trimmedMessage: string;
+  opts: SlackSendOpts;
+  cfg: OpenClawConfig;
+  account: ReturnType<typeof resolveSlackAccount>;
+  token: string;
+  recipient: SlackRecipient;
+  blocks?: (Block | KnownBlock)[];
 }): Promise<SlackSendResult> {
   const { opts, cfg, account, token, recipient, blocks, trimmedMessage } = params;
   const client = opts.client ?? getSlackWriteClient(token);