### Why you’re getting the `ImportError`

`fastmcp` ≥ ​2.0 renamed **`FastClientSession`** → **`Client`** and moved it into the top‑level package.  
So

```python
from fastmcp import FastClientSession          # 🚫 no longer exists
```

now raises the exact error you see.

---

### Quick fix ‑ patch the import

Open **`swarms/tools/mcp_integration.py`** and replace the first import block:

```python
# OLD
from fastmcp import FastClientSession as ClientSession
```

with

```python
# NEW – works with fastmcp ≥ 2.0
from fastmcp import Client as ClientSession
```

*(If you need to stay on fastmcp 1.x, install the old version instead:  
`pip install "fastmcp<2"` and keep your original import.)*

---

### Minimal working smoke‑test

```python
# examples/mcp_example/mcp_client.py
import asyncio
from swarms import Agent
from swarms.prompts.agent_prompts import MATH_AGENT_PROMPT
from swarms.tools.mcp_integration import MCPServerSseParams

# 1. describe the remote MCP server you want to hit
server = MCPServerSseParams(
    url="http://localhost:6274",                 # or any public MCP SSE endpoint
    headers={"Content-Type": "application/json"}
)

# 2. create a Swarms agent and hand it the server list
math_agent = Agent(
    agent_name="Math‑MCP‑Tester",
    system_prompt=MATH_AGENT_PROMPT,
    max_loops=1,
    mcp_servers=[server],        # <‑‑ now recognised
    output_type="final",
)

# 3. run a call that should trigger the server’s “add” tool
result = math_agent.run("Use the add tool to add 2 and 2")
print("🟢 RESULT:", result)
```

---

### Extra housekeeping

1. **Expose `mcp_servers`**  
   In your current `Agent.__init__` the assignment line is commented out:

   ```python
   # self.mcp_servers = mcp_servers      # <- uncomment
   ```

   Make sure the attribute exists before it is accessed in `handle_tool_init()`.

2. **Python < 3.11 + `NotRequired`**  
   Keep

   ```python
   from typing_extensions import NotRequired
   ```
   (You already changed this – good.)

3. **Install / upgrade fastmcp**

   ```bash
   pip install -U fastmcp           # latest 2.x
   # or, for the old API:
   # pip install "fastmcp<2"
   ```

---

### What if you don’t have your own server yet?

Until you spin up the Browserbase example (or any other MCP server), you can test against the **FastMCP public demo**:

```python
demo = MCPServerSseParams(url="https://demo.fastmcp.io/sse")
```

It exposes trivial arithmetic tools (`add`, `multiply`, …) that match the smoke‑test above.

That’s all you need to get your Swarms agent talking to an existing MCP server without touching server‑side code. 🚀