diff --git a/extensions/ringcentral/src/api.ts b/extensions/ringcentral/src/api.ts
index ff711f6a7..1ff88776b 100644
--- a/extensions/ringcentral/src/api.ts
+++ b/extensions/ringcentral/src/api.ts
@@ -6,6 +6,7 @@ import type {
   RingCentralPost,
   RingCentralUser,
   RingCentralAttachment,
+  RingCentralAdaptiveCard,
 } from "./types.js";
 
 // Team Messaging API endpoints
@@ -164,6 +165,60 @@ export async function downloadRingCentralAttachment(params: {
   };
 }
 
+// Adaptive Cards API
+export async function sendRingCentralAdaptiveCard(params: {
+  account: ResolvedRingCentralAccount;
+  chatId: string;
+  card: RingCentralAdaptiveCard;
+  fallbackText?: string;
+}): Promise<{ cardId?: string } | null> {
+  const { account, chatId, card, fallbackText } = params;
+  const platform = await getRingCentralPlatform(account);
+
+  const body = {
+    ...card,
+    type: "AdaptiveCard",
+    $schema: card.$schema ?? "http://adaptivecards.io/schemas/adaptive-card.json",
+    version: card.version ?? "1.3",
+    ...(fallbackText ? { fallbackText } : {}),
+  };
+
+  const response = await platform.post(`${TM_API_BASE}/chats/${chatId}/adaptive-cards`, body);
+  const result = (await response.json()) as { id?: string };
+  return result ? { cardId: result.id } : null;
+}
+
+export async function updateRingCentralAdaptiveCard(params: {
+  account: ResolvedRingCentralAccount;
+  cardId: string;
+  card: RingCentralAdaptiveCard;
+  fallbackText?: string;
+}): Promise<{ cardId?: string }> {
+  const { account, cardId, card, fallbackText } = params;
+  const platform = await getRingCentralPlatform(account);
+
+  const body = {
+    ...card,
+    type: "AdaptiveCard",
+    $schema: card.$schema ?? "http://adaptivecards.io/schemas/adaptive-card.json",
+    version: card.version ?? "1.3",
+    ...(fallbackText ? { fallbackText } : {}),
+  };
+
+  const response = await platform.put(`${TM_API_BASE}/adaptive-cards/${cardId}`, body);
+  const result = (await response.json()) as { id?: string };
+  return { cardId: result.id };
+}
+
+export async function deleteRingCentralAdaptiveCard(params: {
+  account: ResolvedRingCentralAccount;
+  cardId: string;
+}): Promise<void> {
+  const { account, cardId } = params;
+  const platform = await getRingCentralPlatform(account);
+  await platform.delete(`${TM_API_BASE}/adaptive-cards/${cardId}`);
+}
+
 export async function probeRingCentral(
   account: ResolvedRingCentralAccount,
 ): Promise<{ ok: boolean; error?: string; elapsedMs: number }> {
diff --git a/extensions/ringcentral/src/config-schema.ts b/extensions/ringcentral/src/config-schema.ts
index 3281611a5..373e1b796 100644
--- a/extensions/ringcentral/src/config-schema.ts
+++ b/extensions/ringcentral/src/config-schema.ts
@@ -42,6 +42,7 @@ const RingCentralAccountSchemaBase = z
     allowBots: z.boolean().optional(),
     botExtensionId: z.string().optional(),
     selfOnly: z.boolean().optional(),
+    useAdaptiveCards: z.boolean().optional(), // Use Adaptive Cards for code blocks (default: false)
   })
   .strict();
 
diff --git a/extensions/ringcentral/src/markdown.test.ts b/extensions/ringcentral/src/markdown.test.ts
index 93faa8bc3..ba0acf059 100644
--- a/extensions/ringcentral/src/markdown.test.ts
+++ b/extensions/ringcentral/src/markdown.test.ts
@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { toRingCentralMarkdown, needsMarkdownConversion } from "./markdown.js";
+import { toRingCentralMarkdown, needsMarkdownConversion, hasCodeBlocks, markdownToAdaptiveCard } from "./markdown.js";
 
 describe("toRingCentralMarkdown", () => {
   it("converts single underscore italic to asterisk", () => {
@@ -119,3 +119,50 @@ describe("needsMarkdownConversion", () => {
     expect(needsMarkdownConversion("*italic* and **bold**")).toBe(false);
   });
 });
+
+describe("hasCodeBlocks", () => {
+  it("returns true for text with code blocks", () => {
+    expect(hasCodeBlocks("```\ncode\n```")).toBe(true);
+    expect(hasCodeBlocks("```js\nconst x = 1;\n```")).toBe(true);
+  });
+
+  it("returns false for text without code blocks", () => {
+    expect(hasCodeBlocks("plain text")).toBe(false);
+    expect(hasCodeBlocks("`inline code`")).toBe(false);
+  });
+});
+
+describe("markdownToAdaptiveCard", () => {
+  it("converts simple text to adaptive card", () => {
+    const result = markdownToAdaptiveCard("Hello world");
+    expect(result.type).toBe("AdaptiveCard");
+    expect(result.version).toBe("1.3");
+    expect(result.body).toHaveLength(1);
+    expect(result.body[0].type).toBe("TextBlock");
+    expect(result.body[0].text).toBe("Hello world");
+  });
+
+  it("converts code blocks with monospace font", () => {
+    const result = markdownToAdaptiveCard("```js\nconst x = 1;\n```");
+    expect(result.body).toHaveLength(1);
+    expect(result.body[0].fontType).toBe("Monospace");
+    expect(result.body[0].text).toBe("const x = 1;");
+  });
+
+  it("handles mixed text and code blocks", () => {
+    const result = markdownToAdaptiveCard("Some text\n\n```\ncode\n```\n\nMore text");
+    expect(result.body).toHaveLength(3);
+    expect(result.body[0].text).toBe("Some text");
+    expect(result.body[1].fontType).toBe("Monospace");
+    expect(result.body[1].text).toBe("code");
+    expect(result.body[2].text).toBe("More text");
+  });
+
+  it("converts headings with bold styling", () => {
+    const result = markdownToAdaptiveCard("# Title");
+    expect(result.body).toHaveLength(1);
+    expect(result.body[0].weight).toBe("Bolder");
+    expect(result.body[0].size).toBe("Medium");
+    expect(result.body[0].text).toBe("Title");
+  });
+});
diff --git a/extensions/ringcentral/src/markdown.ts b/extensions/ringcentral/src/markdown.ts
index 9df29d5d4..e2711782a 100644
--- a/extensions/ringcentral/src/markdown.ts
+++ b/extensions/ringcentral/src/markdown.ts
@@ -85,3 +85,74 @@ export function needsMarkdownConversion(text: string): boolean {
     /^#{1,6}\s+.+$/m.test(text)
   );
 }
+
+/**
+ * Check if text contains code blocks that would benefit from Adaptive Card formatting
+ */
+export function hasCodeBlocks(text: string): boolean {
+  return /```[\s\S]*?```/.test(text);
+}
+
+/**
+ * Convert markdown text to an Adaptive Card structure.
+ * This preserves code blocks with proper formatting.
+ */
+export function markdownToAdaptiveCard(text: string): {
+  type: "AdaptiveCard";
+  $schema: string;
+  version: string;
+  body: Array<{ type: string; text?: string; wrap?: boolean; fontType?: string; size?: string; weight?: string }>;
+} {
+  const body: Array<{ type: string; text?: string; wrap?: boolean; fontType?: string; size?: string; weight?: string }> = [];
+  
+  // Split by code blocks
+  const parts = text.split(/(```[\s\S]*?```)/g);
+  
+  for (const part of parts) {
+    if (!part.trim()) continue;
+    
+    if (part.startsWith("```")) {
+      // Extract language and code
+      const match = part.match(/```(\w*)\n?([\s\S]*?)\n?```/);
+      if (match) {
+        const [, , code] = match;
+        // Add code block with monospace font
+        body.push({
+          type: "TextBlock",
+          text: code.trim(),
+          wrap: true,
+          fontType: "Monospace",
+        });
+      }
+    } else {
+      // Regular text - convert markdown
+      const converted = toRingCentralMarkdown(part.trim());
+      if (converted) {
+        // Check if it's a heading (starts with **)
+        const headingMatch = converted.match(/^\*\*(.+)\*\*$/);
+        if (headingMatch && !converted.includes("\n")) {
+          body.push({
+            type: "TextBlock",
+            text: headingMatch[1],
+            wrap: true,
+            size: "Medium",
+            weight: "Bolder",
+          });
+        } else {
+          body.push({
+            type: "TextBlock",
+            text: converted,
+            wrap: true,
+          });
+        }
+      }
+    }
+  }
+
+  return {
+    type: "AdaptiveCard",
+    $schema: "http://adaptivecards.io/schemas/adaptive-card.json",
+    version: "1.3",
+    body,
+  };
+}
diff --git a/extensions/ringcentral/src/types.ts b/extensions/ringcentral/src/types.ts
index 961c88cab..0d15559f8 100644
--- a/extensions/ringcentral/src/types.ts
+++ b/extensions/ringcentral/src/types.ts
@@ -53,6 +53,56 @@ export type RingCentralMention = {
   name?: string;
 };
 
+// Adaptive Cards types (Microsoft Adaptive Card schema v1.3)
+export type RingCentralAdaptiveCardElement = {
+  type: string;
+  text?: string;
+  size?: "Small" | "Default" | "Medium" | "Large" | "ExtraLarge";
+  weight?: "Lighter" | "Default" | "Bolder";
+  color?: "Default" | "Dark" | "Light" | "Accent" | "Good" | "Warning" | "Attention";
+  wrap?: boolean;
+  url?: string;
+  altText?: string;
+  columns?: RingCentralAdaptiveCardElement[];
+  items?: RingCentralAdaptiveCardElement[];
+  width?: string | number;
+  style?: string;
+  isVisible?: boolean;
+  id?: string;
+  // Input elements
+  label?: string;
+  placeholder?: string;
+  value?: string;
+  isRequired?: boolean;
+  // Action elements
+  title?: string;
+  data?: Record<string, unknown>;
+  [key: string]: unknown;
+};
+
+export type RingCentralAdaptiveCardAction = {
+  type: "Action.Submit" | "Action.OpenUrl" | "Action.ShowCard" | "Action.ToggleVisibility";
+  title?: string;
+  url?: string;
+  data?: Record<string, unknown>;
+  card?: RingCentralAdaptiveCard;
+  targetElements?: Array<string | { elementId: string; isVisible?: boolean }>;
+};
+
+export type RingCentralAdaptiveCard = {
+  type?: "AdaptiveCard";
+  $schema?: string;
+  version?: string;
+  body?: RingCentralAdaptiveCardElement[];
+  actions?: RingCentralAdaptiveCardAction[];
+  fallbackText?: string;
+  speak?: string;
+  lang?: string;
+  verticalContentAlignment?: "Top" | "Center" | "Bottom";
+  backgroundImage?: string | { url: string; fillMode?: string };
+  minHeight?: string;
+};
+
 export type RingCentralWebhookEvent = {
   uuid?: string;
   event?: string;
@@ -113,6 +163,7 @@ export type RingCentralAccountConfig = {
   botExtensionId?: string;
   replyToMode?: "off" | "all";
   selfOnly?: boolean; // JWT mode: only accept messages from the JWT user in Personal chat (default: true)
+  useAdaptiveCards?: boolean; // Use Adaptive Cards for messages with code blocks (default: false)
 };
 
 export type RingCentralConfig = RingCentralAccountConfig & {