mcp-toy
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@mcp-toy list available tools"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
mcp-toy
Toy project to explore the MCP capability
Following the example here.
MCP Servers
MCP servers can provide 3 main types of capabilities:
Resources- File-like data that can be read by clientsTools- Functions that can be called by LLMPrompts- Pre-written templates that can help users accomplish specific tasks
Claude desktop integration
Run mcp install server.py to load the MCP server to Claude, the corresponding config in ~/Library/Application\ Support/Claude/claude_desktop_config.json will be updated. Here is an example:
{
"mcpServers": {
"weather": {
"command": "uv",
"args": [
"run",
"--with",
"mcp[cli]",
"mcp",
"run",
"/Users/xiangshiyin/Documents/Coding/mcp-toy/server.py"
]
}
}
}Development mode
Run uv run mcp dev server.py to inspect the MCP server
Related MCP server: FastMCP Demo
References
Available Tools
1 toolget_forecastB
Get weather forecast for a location.
Args:
latitude: Latitude of the location
longitude: Longitude of the location
Inputs: latitude (required), longitude (required).
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
TDQS
Scored across 1 tool
Only one tool exists, so no ambiguity is possible. The tool has a clear, distinct purpose.
With a single tool, naming is inherently consistent. The name follows a clear verb_noun pattern.
A server with one trivial tool is an extreme mismatch for any real-world use case. Far too few tools to be useful.
The tool surface is severely incomplete for a weather domain. Missing basic operations like current conditions, historical data, or forecasts for multiple days.
Maintenance
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