aid: mattermost
name: Mattermost
description: >-
  Mattermost is an open-source collaboration platform for technical teams
  that combines secure team messaging, workflow automation, voice/video
  calling, and integrations as a self-hosted Slack alternative. The
  Mattermost REST API exposes full programmatic control over users,
  teams, channels, posts, files, integrations, plugins, and webhooks.
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Messaging
  - Collaboration
  - Team Chat
  - Open Source
  - DevOps
  - Self-Hosted
url: https://raw.githubusercontent.com/api-evangelist/mattermost/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.19'
apis:
  - aid: mattermost:rest-api
    name: Mattermost REST API
    description: >-
      REST API v4 for managing users, teams, channels, posts, threads,
      files, integrations, plugins, webhooks, slash commands, and
      OAuth applications. Authentication uses Personal Access Tokens
      or session tokens via Bearer authentication.
    humanURL: https://api.mattermost.com/
    baseURL: https://your-mattermost-server.com/api/v4
    tags:
      - Messaging
      - Users
      - Teams
      - Channels
      - Posts
      - Webhooks
      - Integrations
    properties:
      - type: Documentation
        url: https://api.mattermost.com/
      - type: API Reference
        url: https://developers.mattermost.com/integrate/reference/rest-api/
      - type: OpenAPI Source
        url: https://github.com/mattermost/mattermost-api-reference
      - type: Developer Guide
        url: https://developers.mattermost.com/contribute/more-info/server/rest-api/
common:
  - type: Website
    url: https://mattermost.com
  - type: Documentation
    url: https://docs.mattermost.com
  - type: Developer Portal
    url: https://developers.mattermost.com/
  - type: GitHub Organization
    url: https://github.com/mattermost
  - type: Sign Up
    url: https://mattermost.com/sign-up/
  - type: Pricing
    url: https://mattermost.com/pricing/
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com