# Mattermost S MCP

> Use this tool when you need to send automated messages to Mattermost channels, enabling seamless communication and integration with other systems. It solves problems of manual notification and information sharing by providing a simple YAML configuration for multiple webhook channels. With input support for MCP protocol and output to Mattermost channels, use it when automating notifications or integrating with Claude Desktop is required.

Canonical page: https://skillsregistry.net/skills/in2out-mattermost-s-mcp  
JSON: https://api.skillsregistry.net/v1/skills/in2out-mattermost-s-mcp

## Description

Enables sending messages to Mattermost channels through webhooks via MCP protocol. Supports multiple webhook channels with simple YAML configuration and integrates seamlessly with Claude Desktop.

## Trust

- **Trust score (0–1):** 0.60
- **Verification tier:** unverified

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** communication
- **Updated:** 2026-04-22

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/v8b53jok1y)
- **Repository:** <https://github.com/in2out/mattermost-s-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "in2out-mattermost-s-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/in2out-mattermost-s-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/in2out-mattermost-s-mcp/pull`

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