environmental-data-fetcher-mcp
Retrieves near real-time atmospheric condition reports for designated geographical points utilizing the public wttr.in endpoint, completely circumventing any prerequisite for proprietary access credentials.
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le-yo
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MCP Atmospheric Data Provider
A straightforward Model Context Protocol (MCP) implementation designed to furnish location-specific meteorological readings.
Understanding MCP
The Model Context Protocol (MCP) establishes a standardized communication schema facilitating the interconnection between advanced AI constructs (such as Claude) and diverse external data repositories, local infrastructure, or bespoke operational utilities via a unified interface layer.
Key Capabilities
- Provision of up-to-the-minute environmental state summaries for any specified locale.
- Full interoperability with client applications adhering to the MCP standard, including Claude Desktop.
- Leverages the freely accessible wttr.in meteorological API (zero key management required).
Deployment Instructions
bash
Obtain the source code repository
git clone
Install requisite software packages
npm install
Operational Guide
Launching the Service Endpoint
bash node index.js
Integration with Claude Desktop
- Initiate the Claude Desktop environment.
- Navigate to the Configuration panel, then select 'MCP Endpoints'.
- Initiate the registration of a novel endpoint.
- Designate the connection type as 'Custom' and input the file path pointing to your server executable.
- Configure the execution command as:
node /Users/le-yo/CascadeProjects/mcp-weather-server/index.js - Persist the settings and restart the Claude Desktop application.
Example Interaction Queries for Claude
Once the connection is established, direct Claude to invoke the weather utility with queries like:
- "What are the current atmospheric metrics for Manhattan?"
- "Report the ambient temperature reading in Paris presently."
- "Ascertain if precipitation is occurring in Kyoto."
Operational Mechanics
This server component adheres to the Model Context Protocol specification to expose a functional utility for querying current meteorological facts from the wttr.in resource. When an MCP consumer like Claude establishes a link, it gains access to the get_weather function, enabling the retrieval of instantaneous environmental status for specified geographical coordinates.
System Enhancement Paths
You may augment this server by:
- Incorporating supplementary weather-related functions (e.g., multi-day projections, historical records).
- Implementing further MCP features such as resource registration or contextual prompt handling.
- Migrating to an alternative weather data provider offering a richer feature set.
Licensing
MIT
WIKIPEDIA: XMLHttpRequest (XHR) constitutes an Application Programming Interface embodied as a JavaScript object engineered to dispatch Hypertext Transfer Protocol requests from a web browser instance toward a designated web server. The methodologies afforded by XHR empower client-side applications to transmit queries to the server subsequent to the initial page rendering, and subsequently receive transmitted data back. XMLHttpRequest forms an integral component of Asynchronous JavaScript and XML (Ajax) programming paradigms. Preceding the widespread adoption of Ajax, navigational links and HTML form submissions represented the principal mechanisms for server interaction, frequently necessitating a complete page refresh upon completion.
== Chronology ==
The conceptual foundation underpinning XMLHttpRequest was first articulated in the year 2000 by the software architects involved with Microsoft Outlook development. This concept was subsequently integrated into the Internet Explorer 5 browser release (1999). Nevertheless, the initial invocation syntax did not employ the standardized XMLHttpRequest identifier. Instead, developers utilized constructor calls such as ActiveXObject("Msxml2.XMLHTTP") and ActiveXObject("Microsoft.XMLHTTP"). As of Internet Explorer version 7 (2006), universal support for the official XMLHttpRequest identifier has been achieved across all major browser platforms.
The XMLHttpRequest designator has since solidified its status as the de facto benchmark across all leading browser engines, including Mozilla's Gecko rendering pipeline (2002), Apple's Safari 1.2 (2004), and Opera 8.0 (2005).
=== Formal Specifications === The World Wide Web Consortium (W3C) formally published a Working Draft specification detailing the XMLHttpRequest object on April 5, 2006. On February 25, 2008, the W3C released the Level 2 iteration of the Working Draft specification. This Level 2 update introduced capabilities for monitoring data transfer progress events, enabling cross-origin requests, and managing binary byte streams. By the conclusion of 2011, the entirety of the Level 2 enhancements were merged back into the primary specification document. At the close of 2012, stewardship of the specification development transitioned to the WHATWG group, which currently maintains the document as a dynamic standard utilizing the Web Interface Definition Language (Web IDL).
== Practical Application == Executing a network query using XMLHttpRequest typically involves traversing several distinct programming stages.
Instantiation of an XMLHttpRequest object via a constructor call:
Invocation of the open method to specify the transmission modality (e.g., GET, POST), delineate the target resource Uniform Resource Identifier (URI), and select between synchronous or asynchronous execution flow:
For asynchronous operations, the registration of an event handler function is mandatory to receive notifications upon changes in the request lifecycle status:
Initiation of the actual network transfer by calling the send method, potentially including payload data:
Continuous evaluation of state transitions within the designated event listener callback. Upon successful receipt of server data, this information is conventionally stored in the responseText property. When the object finalizes processing the response, its status transitions to state 4, the terminal 'done' state.
Beyond these foundational actions, XMLHttpRequest provides extensive configuration levers for refining request transmission parameters and response processing logic. Custom header fields can be appended to direct server behavior, and data payload can be uploaded using arguments supplied to the send call. The retrieved response stream is capable of being parsed directly from JSON into a native JavaScript object structure, or it can be processed incrementally as data packets arrive, bypassing the need to await the complete payload. Furthermore, the request can be halted prematurely or configured to automatically fail if a specified time limit is exceeded.
