# Oo Mattermost

> Mattermost (mattermost.com). Use this skill for ANY Mattermost request — reading, creating, and updating data. Whenever a task involves Mattermost, use this skill instead of calling the API directly.

- Skill: `oomol-lab/oo-mattermost` (Agent Skill)
- Install (CLI): `npx skillmds@latest add oomol-lab/oo-mattermost`
- Raw SKILL.md: https://api.skillmd.com/api/skills/oomol-lab/oo-mattermost/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: oomol-lab (https://skillmd.com/u/oomol-lab)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/oomol-lab/oo-mattermost

---


# Mattermost

Operate **Mattermost** through your OOMOL-connected account. This skill calls the `mattermost` connector with the [oo CLI](https://github.com/oomol-lab/oo-cli); OOMOL injects credentials server-side, so you never handle raw tokens.

## Running an action

Assume the user has already installed the oo CLI, signed in, and connected Mattermost. **Do not run `oo auth login` or open the connection URL proactively — just run the action.** Fall back to [First-time setup](#first-time-setup) only when a command actually fails with an auth or connection error.

**1. Inspect the contract** to get the authoritative input/output schema before building a payload:

```bash
oo connector schema "mattermost" --action "<action_name>"
```

**2. Run the action** with a JSON payload that matches the input schema:

```bash
oo connector run "mattermost" --action "<action_name>" --data '<json>' --json
```

- `--data` takes a JSON object string or `@path/to/file.json`; omit it to send `{}`.
- The response is `{ "data": ..., "meta": { "executionId": "..." } }`; the execution id lives under `meta.executionId`.

Each action is listed below with a one-line description; actions that change state carry a `[write]` or `[destructive]` tag. Before constructing `--data`, fetch the action's live schema with `oo connector schema` to get its authoritative input fields.

## Available actions

- `create_post` — Create a Mattermost post in a channel. [write]
- `get_channel` — Retrieve one Mattermost channel by ID.
- `get_current_user` — Get the Mattermost user associated with the Personal Access Token.
- `get_team` — Retrieve one Mattermost team by ID.
- `list_channel_posts` — List Mattermost posts in a channel.
- `list_team_channels` — List public Mattermost channels in a team.
- `list_user_teams` — List Mattermost teams visible to the current user.

## Safety

- Untagged actions are reads (get / list / search) — safe to run directly.
- **Actions tagged `[write]` change Mattermost state — confirm the exact payload and effect with the user before running.**
- **Actions tagged `[destructive]` remove or overwrite data — always confirm the target and get explicit approval first.**

## First-time setup

These are **one-time** steps — do not repeat them on every call. Run a step only when a command fails for the matching reason.

- **`oo: command not found`** — install the oo CLI (other platforms: <https://cli.oomol.com/install-guide.md>):

  ```bash
  curl -fsSL https://cli.oomol.com/install.sh | bash    # macOS / Linux
  ```

  ```powershell
  irm https://cli.oomol.com/install.ps1 | iex           # Windows PowerShell
  ```

- **Not signed in / authentication error** — sign in to your OOMOL account once:

  ```bash
  oo auth login
  ```

- **`scope_missing` / `credential_expired` / `app_not_ready` / `app_not_found`** — Mattermost is not connected, or the connection expired or lacks a scope. Connect once (auth type: API key) at:

  ```text
  https://console.oomol.com/app-connections?provider=mattermost
  ```

- **HTTP 402 / `OOMOL_INSUFFICIENT_CREDIT`** — billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

## Resources

- Mattermost homepage: https://mattermost.com