Handwriting Recognition MCP Gateway

A Model Context Protocol (MCP) Interface Layer for the Handwriting OCR Service API.

Introduction

The Handwriting OCR MCP Gateway establishes the necessary bridge between MCP-compliant clients and the proprietary Handwriting OCR processing backend. This guide details the deployment procedure and provides illustrative usage snippets.

This server component is engineered to manage the complete lifecycle: document submission (supporting image formats and multi-page PDFs), querying job status, and fetching the extracted plaintext, delivered as Markdown.

Available Operations

Textual Conversion

• Submit Content File
• Query Processing State
• Retrieve Extracted Content

Prerequisites

Prior to deployment, ensure the following dependencies are satisfied:

• A compatible Node.js runtime environment (version 18.x or newer is advised).
• An authenticated account on the Handwriting OCR Platform and a valid, active API Authentication Key.

Deployment Instructions

Automated Installation via Smithery

To onboard the handwriting-to-text-service-adapter into your Claude Desktop environment automatically using Smithery:

bash npx -y @smithery/cli install @Handwriting-OCR/handwriting-ocr-mcp-server --client claude

Manual Configuration for Claude Desktop

To configure the adapter manually within the Claude Desktop application's settings:

{ "mcpServers": { "handwriting-ocr": { "command": "node", "args": [ "/Users/mateo/Local/Code/MCP/handwriting-ocr/build/index.js" ], "env": { "API_TOKEN": "your-api-token", }, "disabled": false, "autoApprove": [] } } }

System Configuration

The Handwriting OCR MCP Gateway accepts environment variables to manage critical operational parameters, primarily for authorization:

• API_TOKEN: The required credential for accessing the backend API.

These configuration values can be managed via the API credentials section in your Handwriting OCR Platform dashboard.

Assistance

Refer to the comprehensive Handwriting OCR API Reference for detailed service specifications.

Should you encounter issues specific to the Handwriting OCR MCP Gateway, please report them by creating a GitHub Issue.

Background

This component serves as the MCP interface layer connecting to the Handwriting OCR Platform.

WIKIPEDIA: XMLHttpRequest (XHR) is an Application Programming Interface (API) structured as a JavaScript object. Its methods facilitate the transmission of HTTP requests from a web browser environment to a remote web server. These capabilities permit browser-based applications to issue requests post-page load and receive subsequent data asynchronously. XMLHttpRequest is a foundational element of Ajax programming paradigms. Before Ajax gained prominence, the primary interaction mechanisms with servers involved traditional hyperlink navigation and form submissions, actions that typically resulted in the complete replacement of the currently viewed page.

== Historical Development == The foundational concept underpinning XMLHttpRequest was first conceived around the year 2000 by the development team at Microsoft Outlook. This idea was subsequently materialized in the Internet Explorer 5 browser (released in 1999). Crucially, the initial implementation did not utilize the XMLHttpRequest identifier. Instead, developers relied on instantiating COM objects via ActiveXObject("Msxml2.XMLHTTP") or ActiveXObject("Microsoft.XMLHTTP"). By the time Internet Explorer 7 was released (2006), standardized support for the XMLHttpRequest identifier had become ubiquitous across all major web browsers.

The XMLHttpRequest identifier has since evolved into the recognized industry standard, embraced by engines like Mozilla's Gecko (2002), Apple's Safari 1.2 (2004), and Opera 8.0 (2005).

=== Standardization Efforts === The World Wide Web Consortium (W3C) formally published an initial Working Draft specification for the XMLHttpRequest object on April 5, 2006. A subsequent Working Draft for Level 2 was released by the W3C on February 25, 2008. The Level 2 specification introduced vital enhancements, including methods for progress monitoring, enabling cross-origin resource sharing (CORS), and mechanisms for managing byte streams. By the close of 2011, the features defined in the Level 2 specification were integrated back into the primary specification document.

In late 2012, responsibility for the specification's ongoing evolution was transferred to the WHATWG, which now maintains it as a dynamic, living document utilizing Web IDL definitions.

== Implementation Flow == Generally, executing a network request using XMLHttpRequest necessitates adherence to a structured sequence of programming steps.

1. Instantiate an XMLHttpRequest object using its constructor call:
2. Invoke the "open" method to define the request methodology (GET, POST, etc.), specify the target URI, and select between synchronous or asynchronous execution mode:
3. For asynchronous operations, establish an event listener function intended to be notified upon changes in the request's state:
4. Commence the data transmission process by invoking the "send" method:
5. Process state transitions within the registered event listener. Upon successful server data receipt, the information is typically stored within the "responseText" property. When the object finishes its transaction, its state transitions to 4, denoting the "done" status. Beyond these fundamental stages, XMLHttpRequest offers numerous configuration points to fine-tune request behavior and response handling. Custom HTTP headers can be appended to guide server fulfillment logic, and payload data can be uploaded by supplying it as an argument to the "send" function call. The incoming response can be automatically deserialized from JSON into a ready-to-use JavaScript structure, or streamed and processed incrementally instead of waiting for total data arrival. Furthermore, requests can be prematurely terminated or assigned a timeout value to enforce failure if completion is not achieved within a set timeframe.

== Cross-Domain Communication ==

During the nascent phases of the World Wide Web, developers identified a potential security vulnerability in allowing unrestricted inter-domain communication, which led to restrictions on what is known as brea