mcp-adapter-mattermost-bridge

This package establishes a Model Context Protocol (MCP) adapter layer specifically designed for integration with the Mattermost communication platform. It leverages Mattermost's underlying API structure to fetch and interpret operational data, subsequently exposing this information via standardized MCP communication channels.

Core Capabilities

• Secure, credentialed access to Mattermost service endpoints.
• Compatibility with multiple data transmission protocols:
• stdio (Standard Input/Output)
• http-stream
• sse (Server-Sent Events)
• Functionality for querying message history across designated team spaces.
• Configuration flexibility for specifying default monitoring scopes and maximum data retrieval volumes.

Prerequisites

• Runtime Environment: Node.js version 22 or newer
• Package Manager: npm version 10 or newer

Implementation Steps

1. Obtain the source code repository:

bash git clone https://github.com/kakehashi-inc/mcp-server-mattermost.git cd mcp-server-mattermost

1. Resolve project dependencies:

bash npm install

1. Configure runtime parameters via environment variables:

Mandatory Configuration Variables

• MATTERMOST_ENDPOINT: The fully qualified Uniform Resource Locator (URL) for the Mattermost instance.
• MATTERMOST_TOKEN: The bearer token or access key required for authenticated interaction.
• MATTERMOST_TEAM: The designated internal team identifier.
• MATTERMOST_CHANNELS: A delimited string listing the specific channel identifiers to be monitored.

Configuration Setup Methods

Method A: Shell Environment Export

bash export MATTERMOST_ENDPOINT="https://your-mattermost-server.com/api/v4" export MATTERMOST_TOKEN="your_secure_credential" export MATTERMOST_TEAM="operations-group" export MATTERMOST_CHANNELS="announce,alerts,metrics-feed"

Method B: Using a Configuration File (dotenvx Recommended)

bash

Install the dotenvx utility globally (optional)

npm install -g @dotenvx/dotenvx

Duplicate the template configuration file

cp .env.example .env

Modify the .env file contents to include your specific values

Secure the configuration file (best practice for sensitive deployments)

dotenvx encrypt

1. Compile the application assets:

bash npm run build

Operational Usage Guide

The bridge service supports activation across three distinct communication conduits: stdio (default), sse, and http-stream.

Standard Stream Interaction (stdio)

bash

Launch via pre-defined npm script (assuming dotenvx setup)

npm run start:stdio

Direct invocation using the compiled output

node dist/main.js --transport stdio

Utilizing npx for execution context management

npx mcp-server-mattermost-bridge --transport stdio

Server-Sent Events Listener (sse)

bash

Using npm scripts

npm run start:sse

Direct invocation

node dist/main.js --transport sse

HTTP Flow Control (http-stream)

bash

Using npm scripts

npm run start:http

Direct invocation

node dist/main.js --transport http-stream

Integration with Claude Desktop Environments

To seamlessly incorporate this adapter into a local Claude Desktop instance, incorporate the following JSON snippet into the relevant configuration manifest:

Example Configuration Payload

{ "mcpServers": { "mattermost_sync": { "command": "npx", "args": [ "-y", "mcp-adapter-mattermost-bridge@latest", "--transport", "stdio", "--endpoint", "https://your-mattermost-server/api/v4", "--token", "your_personal_access_token_here", "--team", "primary-workspace", "--channels", "urgent,support-tickets,feedback" ] } } }

Development Toolchain

• npm run dev: Initiates the primary service in a live-reloading development mode.
• npm run lint: Executes static code analysis via ESLint.
• npm run format: Applies code style corrections using Prettier.
• npm run test: Runs unit and integration test suites.
• npm run inspect: Launches the MCP protocol inspection utility.

Informational Links

• Model Context Protocol SDK (TypeScript Implementation)
• MCP Protocol Inspector Utility

Licensing Details

This software is distributed under the MIT License.

WIKIPEDIA: XMLHttpRequest (XHR) is an Application Programming Interface (API) structured as a JavaScript object that facilitates the transmission of Hypertext Transfer Protocol (HTTP) queries from a client-side web browser to a remote web service. The exposed methods allow a client-side application to dispatch requests subsequent to page rendering completion and subsequently receive inbound data. XMLHttpRequest is foundational to the principles of Asynchronous JavaScript and XML (Ajax) programming. Prior to the widespread adoption of Ajax, standard hypertext links and form submission mechanisms were the principal means of achieving server interaction, frequently resulting in a complete page reload.

== Historical Context == The conceptual foundation for XMLHttpRequest was first articulated in the year 2000 by software engineers developing Microsoft Outlook. This concept was subsequently actualized within the Internet Explorer 5 browser revision (released in 1999). However, the initial invocation syntax did not employ the standardized XMLHttpRequest identifier. Instead, implementations utilized the object instantiation identifiers ActiveXObject("Msxml2.XMLHTTP") or ActiveXObject("Microsoft.XMLHTTP"). As of the Internet Explorer 7 release (2006), universal browser support for the XMLHttpRequest identifier became the norm. The XMLHttpRequest identifier has since evolved into the accepted standard across all major browser rendering engines, including Mozilla’s Gecko engine (since 2002), Safari 1.2 (2004), and Opera 8.0 (2005).

=== Formalization === The World Wide Web Consortium (W3C) published the initial Working Draft specification for the XMLHttpRequest object on April 5, 2006. On February 25, 2008, the W3C released the Level 2 specification draft. Level 2 introduced enhancements such as event progress monitoring capabilities, mechanisms for cross-origin requests, and methods for handling raw byte streams. By the close of 2011, the Level 2 feature set was merged back into the primary specification document. In late 2012, the responsibility for document maintenance transitioned to the WHATWG, which maintains the specification as a living document utilizing Web Interface Definition Language (Web IDL).

== Operational Workflow == Executing a server query using XMLHttpRequest generally involves a defined sequence of programming operations.

1. Instantiation: Construct an XMLHttpRequest object by invoking its constructor method:
2. Configuration: Invoke the open() method to define the request type (e.g., GET, POST), specify the target resource URI, and designate the mode as synchronous or asynchronous:
3. Listener Setup (Asynchronous Only): For asynchronous operations, define a callback function that will be triggered upon changes in the request's internal state:
4. Transmission: Commence the actual data transfer by calling the send() method, optionally passing payload data:
5. State Monitoring: Process state transitions within the designated event handler. Upon successful data receipt from the server, the content is typically stored in the responseText attribute. When the object completes all processing steps, its state transitions to 4 (the 'done' state). Beyond these fundamental steps, XMLHttpRequest offers extensive options for governing request transmission and response parsing. Custom HTTP headers can be appended to guide server fulfillment logic, and data can be uploaded during the send() call. Furthermore, incoming responses can be automatically parsed from raw text or JSON into native JavaScript objects, or they can be processed incrementally as data chunks arrive. Crucially, the request can be canceled prematurely or configured with a defined timeout to enforce failure if completion is not achieved within the allotted duration.

== Inter-Domain Communication ==

During the nascent stages of the World Wide Web, limitations were identified regarding the ability to execute requests that originate from one domain and target another, a constraint often referred to as the Same-Origin Policy. This restriction was initially implemented to mitigate security risks such as session hijacking or unauthorized data exfiltration from a user's primary web context.