MCP-WTIT
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-WTITwhat time is it in Tokyo right now?"
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-WTIT (What Time Is It?)
A Model Context Protocol (MCP) server that provides current time in ISO8601 format with timezone support.
๐ Features
โฐ Get current time with detailed information (ISO8601, timestamp, timezone)
๐ Support for all IANA timezones
๐ฏ Optional milliseconds precision
๐๏ธ Clean Architecture design
๐ฆ ESModules with TypeScript 5.6+
โ Comprehensive test coverage
๐ง Type-safe with strict TypeScript configuration
Related MCP server: DateTime MCP Server
๐ Requirements
Node.js 18.0.0 or higher
npm or yarn
๐ ๏ธ Installation
As a global package
# Install globally
npm install -g mcp-wtit
# Run the server
mcp-wtitAs a dependency
# Install as a dependency
npm install mcp-wtitFrom source
# Clone the repository
git clone https://github.com/yorifuji/mcp-wtit.git
cd mcp-wtit
# Install dependencies
npm install
# Build the project
npm run build
# Run the server
npm start๐ฆ Quick Start
For MCP Clients (Claude Desktop, etc.)
Add to your MCP client configuration:
If installed globally:
{
"mcpServers": {
"mcp-wtit": {
"command": "mcp-wtit"
}
}
}If installed locally:
{
"mcpServers": {
"mcp-wtit": {
"command": "node",
"args": ["./node_modules/mcp-wtit/dist/index.js"]
}
}
}From source:
{
"mcpServers": {
"mcp-wtit": {
"command": "node",
"args": ["/path/to/mcp-wtit/dist/index.js"]
}
}
}Debug with MCP Inspector
MCP Inspector provides a web-based interface to test and debug your MCP server:
# Build the project first
npm run build
# Run with MCP Inspector
npm run inspectThis will:
Start the MCP Inspector on http://localhost:6274
Automatically open your browser
Connect to the MCP server with debug capabilities
In the Inspector, you can:
View available tools and their schemas
Test tool calls with different parameters
Monitor request/response communication
Debug server behavior in real-time
For Development
# Run in development mode
npm run dev
# Run tests
npm test
# Run tests with coverage
npm run test:coverage
# Lint code
npm run lint
# Type check
npm run typecheck๐ API Documentation
Tools
get_current_time
Get the current time with detailed information.
Parameters:
includeMilliseconds(boolean, optional): Include milliseconds in ISO8601 format (default: true)timezone(string, optional): Timezone for the time (default: "UTC")
Response:
{
"iso8601": "2024-01-15T10:30:45.123Z",
"timestamp": 1705315845123,
"timezone": "UTC"
}๐๏ธ Architecture
This project follows Clean Architecture principles:
src/
โโโ domain/ # Business logic (no dependencies)
โโโ application/ # Use cases
โโโ infrastructure/ # External interfaces (MCP)
โโโ shared/ # Shared types and utilities
โโโ di/ # Dependency injectionSee Architecture Documentation for details.
๐งช Testing
Tests are located in the tests/ directory and use Vitest:
# Run all tests
npm test
# Run tests in watch mode
npm run test:watch
# Generate coverage report
npm run test:coverage๐ฆ Scripts
Script | Description |
| Build the TypeScript project |
| Run in development mode |
| Run the built server |
| Debug with MCP Inspector |
| Run tests |
| Run tests in watch mode |
| Run tests with coverage report |
| Run ESLint |
| Run ESLint and fix issues |
| Run TypeScript type checking |
๐ค Contributing
Fork the repository
Create your feature branch (
git checkout -b feature/amazing-feature)Commit your changes (
git commit -m 'Add some amazing feature')Push to the branch (
git push origin feature/amazing-feature)Open a Pull Request
๐ License
This project is licensed under the MIT License - see the LICENSE file for details.
๐ Acknowledgments
Built for the Model Context Protocol
Inspired by Clean Architecture principles
๐ฆ NPM Package
Published on npm: mcp-wtit
Available Tools
1 toolget_current_timeC
Get the current time with detailed information including ISO8601 format, timestamp, and timezone
| Name | Required | Description | Default |
|---|---|---|---|
| includeMilliseconds | No | Include milliseconds in the ISO8601 format (default: true) | |
| timezone | No | Timezone for the time (default: UTC). Examples: "UTC", "America/New_York", "Asia/Tokyo" | UTC |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. While it mentions the output format details, it doesn't describe whether this is a read-only operation, whether it has side effects, rate limits, authentication requirements, or error conditions. For a tool with zero annotation coverage, this represents a significant gap in behavioral transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that communicates the core functionality and output details. It's appropriately sized for this simple tool, though it could be slightly more structured by separating purpose from output format details.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple time retrieval tool with 2 optional parameters and 100% schema coverage, the description is minimally adequate. However, without annotations or an output schema, it should ideally provide more context about the return format, error handling, and behavioral characteristics to be truly complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 100% schema description coverage, the input schema already fully documents both parameters (includeMilliseconds and timezone) with descriptions and defaults. The tool description adds no additional parameter information beyond what's in the schema, so it meets the baseline expectation but doesn't provide extra value.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose ('Get the current time') and specifies what information it provides ('detailed information including ISO8601 format, timestamp, and timezone'). It distinguishes itself from potential generic time tools by listing specific output details. However, without sibling tools, we cannot assess differentiation from alternatives.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus alternatives, prerequisites, or typical use cases. It simply states what the tool does without context about when it's appropriate or what problems it solves.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
1 tool update
- First observed
get_current_time
TDQS
Scored across 1 tool
With only one tool, there is no possibility of ambiguity or overlap between tools. The tool's purpose is clearly distinct as it is the only one available.
A single tool inherently has perfect naming consistency since there are no other tools to compare against. The name 'get_current_time' follows a clear verb_noun pattern.
One tool is too few for most server purposes, as it severely limits functionality and scope. This feels thin and inadequate for handling time-related operations beyond just getting the current time.
The server's domain appears to be time-related, but with only a single tool for getting the current time, there are significant gaps. Missing operations like time conversion, scheduling, or date calculations make the surface severely incomplete.
Maintenance
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