wehub-resource-sync
60e0ffc959
Upgrade checks / Notify on failure (push) Has been cancelled
Upgrade checks / Close issue on success (push) Has been cancelled
Schema Crash Test / Real-world schema crash test (232K schemas) (push) Has been cancelled
Run static analysis / static_analysis (push) Has been cancelled
Tests / Tests: Python 3.10 on ubuntu-latest (push) Has been cancelled
Tests / Tests: Python 3.13 on ubuntu-latest (push) Has been cancelled
Tests / Tests: Python 3.10 on windows-latest (push) Has been cancelled
Tests / Tests with lowest-direct dependencies (push) Has been cancelled
Tests / MCP conformance tests (push) Has been cancelled
Tests / Integration tests (push) Has been cancelled
Tests / Package install smoke (push) Has been cancelled
Upgrade checks / Static analysis (push) Has been cancelled
Upgrade checks / Tests: Python 3.10 on ubuntu-latest (push) Has been cancelled
Upgrade checks / Tests: Python 3.13 on ubuntu-latest (push) Has been cancelled
Upgrade checks / Tests: Python 3.10 on windows-latest (push) Has been cancelled
Upgrade checks / Integration tests (push) Has been cancelled
Update MCPServerConfig Schema / update-config-schema (push) Has been cancelled
Update SDK Documentation / update-sdk-docs (push) Has been cancelled
89 lines
2.6 KiB
Python
89 lines
2.6 KiB
Python
# /// script
|
|
# dependencies = ["anthropic", "fastmcp", "rich"]
|
|
# ///
|
|
"""
|
|
Server-Side Fallback Handler
|
|
|
|
Demonstrates configuring a sampling handler on the server. This ensures
|
|
sampling works even when the client doesn't provide a handler.
|
|
|
|
The server runs as an HTTP server that can be connected to by any MCP client.
|
|
|
|
Run:
|
|
uv run examples/sampling/server_fallback.py
|
|
|
|
Then connect with any MCP client (e.g., Claude Desktop) or test with:
|
|
curl http://localhost:8000/mcp/
|
|
"""
|
|
|
|
import asyncio
|
|
|
|
from rich.console import Console
|
|
from rich.panel import Panel
|
|
|
|
from fastmcp import FastMCP
|
|
from fastmcp.client.sampling.handlers.anthropic import AnthropicSamplingHandler
|
|
from fastmcp.server.context import Context
|
|
|
|
console = Console()
|
|
|
|
|
|
# Create server with a fallback sampling handler
|
|
# This handler is used when the client doesn't support sampling
|
|
mcp = FastMCP(
|
|
"Server with Fallback Handler",
|
|
sampling_handler=AnthropicSamplingHandler(default_model="claude-sonnet-4-5"),
|
|
sampling_handler_behavior="fallback", # Use only if client lacks sampling
|
|
)
|
|
|
|
|
|
@mcp.tool
|
|
async def summarize(text: str, ctx: Context) -> str:
|
|
"""Summarize the given text."""
|
|
console.print(f"[bold cyan]SERVER[/] Summarizing text ({len(text)} chars)...")
|
|
|
|
result = await ctx.sample(
|
|
messages=f"Summarize this text in 1-2 sentences:\n\n{text}",
|
|
system_prompt="You are a concise summarizer.",
|
|
max_tokens=150,
|
|
)
|
|
|
|
console.print("[bold cyan]SERVER[/] Summary complete")
|
|
return result.text or ""
|
|
|
|
|
|
@mcp.tool
|
|
async def translate(text: str, target_language: str, ctx: Context) -> str:
|
|
"""Translate text to the target language."""
|
|
console.print(f"[bold cyan]SERVER[/] Translating to {target_language}...")
|
|
|
|
result = await ctx.sample(
|
|
messages=f"Translate to {target_language}:\n\n{text}",
|
|
system_prompt=f"You are a translator. Output only the {target_language} translation.",
|
|
max_tokens=500,
|
|
)
|
|
|
|
console.print("[bold cyan]SERVER[/] Translation complete")
|
|
return result.text or ""
|
|
|
|
|
|
async def main():
|
|
console.print(
|
|
Panel.fit(
|
|
"[bold]Server-Side Fallback Handler Demo[/]\n\n"
|
|
"This server has a built-in Anthropic handler that activates\n"
|
|
"when clients don't provide their own sampling support.",
|
|
subtitle="server_fallback.py",
|
|
)
|
|
)
|
|
console.print()
|
|
console.print("[bold yellow]Starting HTTP server on http://localhost:8000[/]")
|
|
console.print("Connect with an MCP client or press Ctrl+C to stop")
|
|
console.print()
|
|
|
|
await mcp.run_http_async(host="localhost", port=8000)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
asyncio.run(main())
|