--- title: "Mattermost API: connect it to your AI chat ยท Hypamoon" description: "The Mattermost API is open, signs in with a personal access token and sends webhooks. What your AI chat can build with it on Hypamoon, with sources." url: https://hypamoon.com/connect-to/mattermost --- 1. [Connect to](https://hypamoon.com/connect-to) 2. Mattermost Work and projects # Connect Mattermost to Hypamoon Yes. Mattermost has a public, versioned API and you create the key yourself, so your chat can write the adapter. Open ## The check Three questions about the API of Mattermost, answered from its own docs. **Public API docs**\ **Yes.** [Read the docs](https://docs.mattermost.com/api) **A key you create yourself**\ **Yes.** Use personal access tokens or a bot account on your own Mattermost server. [docs.mattermost.com](https://docs.mattermost.com/api) **Versions or a changelog**\ **Yes.** API v4, described as stable and semver tracked. [docs.mattermost.com](https://docs.mattermost.com/api) **How it signs in**\ Personal access token or bot token as a Bearer token. **Webhooks**\ **Yes.** It can tell your app when something changes. [docs.mattermost.com](https://docs.mattermost.com/api) **Hosting**\ Cloud and self-hosted ## What you can build Post an alert in a channel when something happens in another system, and answer questions from a channel with a bot. Your chat writes it as a Hypamoon adapter from the docs above. Reading starts after you click Allow in the portal, and every write waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - Your adapter uses a fixed key: you paste it once in the Hypamoon portal, never in the chat, and it only goes to the API host you allow. - If you host it yourself, the API of your own installation must be reachable over HTTPS from the internet, so the adapter can call it. ## Try it in your chat Fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for Mattermost. API docs: https://docs.mattermost.com/api. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Mattermost.%20API%20docs%3A%20https%3A%2F%2Fdocs.mattermost.com%2Fapi.%20Read%3A%20%5Bwhat%5D.%20Write%3A%20%5Bwhat%2C%20or%20nothing%5D.) In Claude, or another chat with the full Hypamoon connection; adapters are not in ChatGPT yet. You paste the key in the portal, never in the chat. [The full recipe](https://hypamoon.com/r/build-an-adapter) ## Sources Checked on 7 November 2026. - [docs.mattermost.com/api](https://docs.mattermost.com/api) Mattermost is a name of its owner, used here only to describe the software. This page is not an official integration and Hypamoon has no partnership with Mattermost. Found something that changed? Tell us at [support](https://hypamoon.com/support#contact). ## More in work and projects - [**Airtable** Open](https://hypamoon.com/connect-to/airtable) - [**Asana** Open](https://hypamoon.com/connect-to/asana) - [**Basecamp** Open](https://hypamoon.com/connect-to/basecamp) - [**ClickUp** Open](https://hypamoon.com/connect-to/clickup) - [**Confluence** Open](https://hypamoon.com/connect-to/confluence) - [**Google Workspace** Open](https://hypamoon.com/connect-to/google-workspace) - [**Harvest** Open](https://hypamoon.com/connect-to/harvest) - [**Jira** Open](https://hypamoon.com/connect-to/jira) - [**Microsoft 365** Open](https://hypamoon.com/connect-to/microsoft-365) - [**Miro** Open](https://hypamoon.com/connect-to/miro) - [**monday.com** Open](https://hypamoon.com/connect-to/monday-com) - [**Notion** Open](https://hypamoon.com/connect-to/notion) - [**Slack** Open](https://hypamoon.com/connect-to/slack) - [**Smartsheet** Open](https://hypamoon.com/connect-to/smartsheet) - [**Teamwork.com** Open](https://hypamoon.com/connect-to/teamwork-com) - [**Toggl Track** Open](https://hypamoon.com/connect-to/toggl-track) - [**Trello** Open](https://hypamoon.com/connect-to/trello) - [**Wrike** Open](https://hypamoon.com/connect-to/wrike) - [**Zoom** Open](https://hypamoon.com/connect-to/zoom) - [**Ultimo** Possible](https://hypamoon.com/connect-to/ultimo) - [**MOCO** Open](https://hypamoon.com/connect-to/moco) - [**awork** Open](https://hypamoon.com/connect-to/awork) - [**Bitrix24** Open](https://hypamoon.com/connect-to/bitrix24) - [**Gmail** Open](https://hypamoon.com/connect-to/gmail) - [**Google Sheets** Open](https://hypamoon.com/connect-to/google-sheets) - [**Google Docs** Open](https://hypamoon.com/connect-to/google-docs) - [**Google Meet** Open](https://hypamoon.com/connect-to/google-meet) - [**Outlook** Open](https://hypamoon.com/connect-to/outlook) - [**Microsoft Teams** Open](https://hypamoon.com/connect-to/microsoft-teams) - [**Microsoft Excel** Open](https://hypamoon.com/connect-to/microsoft-excel) - [**Microsoft Planner** Open](https://hypamoon.com/connect-to/microsoft-planner) - [**Coda** Open](https://hypamoon.com/connect-to/coda) - [**Discord** Open](https://hypamoon.com/connect-to/discord) - [**Clockify** Open](https://hypamoon.com/connect-to/clockify) - [**Zoho Projects** Open](https://hypamoon.com/connect-to/zoho-projects) - [**Float** Open](https://hypamoon.com/connect-to/float) - [**Productive** Open](https://hypamoon.com/connect-to/productive) - [**QuickBooks Time** Open](https://hypamoon.com/connect-to/quickbooks-time) - [**Podio** Possible](https://hypamoon.com/connect-to/podio) - [**Fireflies.ai** Open](https://hypamoon.com/connect-to/fireflies-ai) - [**Fathom** Open](https://hypamoon.com/connect-to/fathom) - [**Whereby** Open](https://hypamoon.com/connect-to/whereby) - [**GoTo Meeting** Open](https://hypamoon.com/connect-to/goto-meeting) - [**Guru** Open](https://hypamoon.com/connect-to/guru) - [**Todoist** Open](https://hypamoon.com/connect-to/todoist) - [**Paymo** Open](https://hypamoon.com/connect-to/paymo) - [**Staffbase** Open](https://hypamoon.com/connect-to/staffbase) - [**MeisterTask** Possible](https://hypamoon.com/connect-to/meistertask) - [**Haiilo** Unknown](https://hypamoon.com/connect-to/haiilo) - [**LumApps** Unknown](https://hypamoon.com/connect-to/lumapps) - [**Speakap** Possible](https://hypamoon.com/connect-to/speakap) - [**Flip** Open](https://hypamoon.com/connect-to/flip) - [**Google AppSheet** Open](https://hypamoon.com/connect-to/google-appsheet) [All 1094 tools](https://hypamoon.com/connect-to) ## Tool not listed? Ask the chat to check its API. The same three checks work for any software. Your chat reads the vendor's own docs and tells you what it found. Say this in your chat > Check if \[software\] has an open API that a Hypamoon adapter can use: public API docs, a key or token I can create myself without asking the vendor, and versions or a changelog. Link the pages you used. [Open in Claude](https://claude.ai/new?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) [Open in ChatGPT](https://chatgpt.com/?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) Fill in the name of your software. Checking needs no connection to Hypamoon. ## Ready to connect Mattermost? Connect your chat once, then ask it to build the adapter. [Start free](https://app.hypamoon.com/?mode=signup&utm_source=connect-to&utm_campaign=mattermost) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~mattermost#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~mattermost#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)