diff --git a/attached_assets/Pasted--Why-you-re-getting-the-ImportError-fastmcp-2-0-renamed-FastClientSession-Cl-1745142391066.txt b/attached_assets/Pasted--Why-you-re-getting-the-ImportError-fastmcp-2-0-renamed-FastClientSession-Cl-1745142391066.txt new file mode 100644 index 00000000..8c95135e --- /dev/null +++ b/attached_assets/Pasted--Why-you-re-getting-the-ImportError-fastmcp-2-0-renamed-FastClientSession-Cl-1745142391066.txt @@ -0,0 +1,105 @@ +### 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. 🚀 \ No newline at end of file