docs(assistants): add ts/python/curl call tabs to appointment scheduling

Author: goosewin

fern/assistants/examples/appointment-scheduling.mdx

@@ -185,7 +185,78 @@ Use the Google Calendar integration for availability and booking, or your own AP
 
 ---
 
-## 4. Test and validate
+## 4. Make calls
+
+<Tabs>
+  <Tab title="TypeScript (Server SDK)">
+    ```typescript title="create web call"
+    import { VapiClient } from "@vapi-ai/server-sdk";
+
+    const vapi = new VapiClient({ token: process.env.VAPI_API_KEY! });
+
+    await vapi.calls.create({
+      transport: { type: "web" },
+      assistant: { assistantId: "your-assistant-id" }
+    });
+    ```
+
+    ```typescript title="create phone call"
+    await vapi.calls.create({
+      phoneNumberId: "your-phone-number-id",
+      customer: { number: "+15551234567" },
+      assistant: { assistantId: "your-assistant-id" }
+    });
+    ```
+  </Tab>
+
+  <Tab title="Python (Server SDK)">
+    ```python title="create web call"
+    import os
+    from vapi import Vapi
+
+    client = Vapi(token=os.getenv("VAPI_API_KEY"))
+
+    client.calls.create(
+        transport={"type": "web"},
+        assistant_id="your-assistant-id",
+    )
+    ```
+
+    ```python title="create phone call"
+    client.calls.create(
+        phone_number_id="your-phone-number-id",
+        customer={"number": "+15551234567"},
+        assistant_id="your-assistant-id",
+    )
+    ```
+  </Tab>
+
+  <Tab title="cURL (web)">
+    ```bash
+    curl -X POST "https://api.vapi.ai/call/web" \
+      -H "Authorization: Bearer $VAPI_API_KEY" \
+      -H "Content-Type: application/json" \
+      -d '{
+        "assistant": { "assistantId": "your-assistant-id" }
+      }'
+    ```
+  </Tab>
+
+  <Tab title="cURL (phone)">
+    ```bash
+    curl -X POST "https://api.vapi.ai/call" \
+      -H "Authorization: Bearer $VAPI_API_KEY" \
+      -H "Content-Type: application/json" \
+      -d '{
+        "assistant": { "assistantId": "your-assistant-id" },
+        "phoneNumberId": "your-phone-number-id",
+        "customer": { "number": "+15551234567" }
+      }'
+    ```
+  </Tab>
+</Tabs>
+
+## 5. Test and validate
 
 <Steps>
   <Step title="Attach a phone number">