Integration
Connect Mattermost and PostStack
When New Channel fires in Mattermost, your agent runs Add a contact in PostStack, or Contact Updated (instant) in PostStack to Post Message in Mattermost. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want Mattermost and PostStack to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiOne connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.
Set it up in your client
Claude Code
Run this in the directory you want to work in.
claude mcp add --transport http -s project apiant-ai https://mcp.apiant.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)Claude, web and desktop
Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.
Setup guide (opens in a new tab)Cursor
Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.
Setup guide (opens in a new tab)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)Codex and the ChatGPT desktop app
Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.
Setup guide (opens in a new tab)Any other MCP client
Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.
Setup guide (opens in a new tab)Example flows
What Mattermost and PostStack can do together
From Mattermost to PostStack
When New Channel in Mattermost
then Add a contact in PostStack
From PostStack to Mattermost
Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships.
Everything your agent can do with Mattermost and PostStack
Triggers and actions 9 triggers · 57 actions
- New Channel
Triggers when a new public channel is created in a Mattermost team.
- New user
Triggers when a new user joins the selected Mattermost team.
- Add direct channel
Creates (or returns the existing) direct message channel between two users.
- Add Reaction
Adds an emoji reaction to a Mattermost post.
- Add user
Creates a new user account on the Mattermost server and returns the created user.
- Add User to Channel
Adds a user to a Mattermost channel.
- Add user to team
Adds a user to a team, making them a team member.
- Create Channel
Creates a public or private channel in a Mattermost team.
- Delete channel
Deletes (archives) a Mattermost channel, or permanently deletes it when requested.
- Delete Post
Deletes a Mattermost post.
- Delete reaction
Removes a user's emoji reaction from a post.
- Find channels by name
Searches a team's public channels (and channels you belong to) whose name or display name matches a search term, and returns the matching channels.
- Find posts by terms
Searches the posts in a team for the given search terms and returns the matching posts.
- Find User by Email
Finds a Mattermost user by email address.
- Find user by username
Finds a Mattermost user by their username and returns the user's profile.
- Get channel
Returns a Mattermost channel's details (name, display name, team, type, purpose and header) by its channel ID.
- Get Post
Returns a single Mattermost post by its ID.
- Get team
Returns a Mattermost team by its ID.
- Get user
Returns a Mattermost user's profile by their user ID.
- List channels
Returns the public channels on a Mattermost team.
- List posts
Returns the most recent posts in a Mattermost channel, newest first, optionally limited to posts changed since a time or before/after a given post.
- List Teams
Returns the Mattermost teams you belong to.
- List users
Returns users on the Mattermost server, optionally limited to a team, channel or group, or filtered by role and active status.
- Pin post
Pins a post to the channel it was posted in.
- Post Message
Posts a new message to a Mattermost channel, optionally as a reply in a thread.
- Remove user from channel
Removes a user from a channel.
- Update channel
Updates a channel's name, display name, purpose, header or other settings. Only the fields you fill in are changed.
- Update Post
Changes the text of an existing Mattermost post.
- Contact Deleted (instant)
Fires when a contact is deleted (event: contact.deleted).
- Contact Updated (instant)
Fires when a contact is updated (event: contact.updated).
- Email Bounced (instant)
Fires when an email bounces (event: email.bounced).
- Email Delivered (instant)
Fires when an email is delivered (event: email.delivered).
- New Contact (instant)
Fires when a contact is created (event: contact.created).
- New Inbound Email
Polls for newly received inbound emails.
- New Sent Email (instant)
Fires when an email is sent (event: email.sent).
- Add a broadcast
Create a new marketing broadcast.
- Add a contact
Create a new contact.
- Add a segment
Create a new manual contact segment.
- Add a template
Create a new email template.
- Add contacts to segment
Add contacts to an existing segment.
- Add suppression
Add an address to the suppression list.
- Cancel broadcast
Cancel an in-flight broadcast.
- Cancel email
Cancel a scheduled or queued email before it sends.
- Delete a contact
Delete a contact.
- Delete a template
Delete an email template.
- Get a contact
Fetch one contact by ID.
- Get a template
Fetch one email template by ID.
- Get broadcast
Retrieve one broadcast by its public id, including the HTML and text bodies that the list endpoint omits.
- Get email
Fetch one sent or queued email by ID.
- Get email events
Get the delivery event timeline for one email.
- Get inbound email
Fetch one received inbound email by ID.
- Import contacts
Bulk-import a CSV list of contacts.
- List broadcasts
List marketing broadcasts.
- List contacts
List contacts in the account.
- List emails
List sent, queued, and scheduled emails.
- List inbound emails
List emails received via inbound parsing.
- List segments
List contact segments.
- List suppressed addresses
List addresses on the suppression list.
- List templates
List email templates.
- Send an email
Send a transactional email through PostStack.
- Send broadcast
Start sending a broadcast to its recipients.
- Send emails in batch
Send up to 100 emails in a single request.
- Update a contact
Update an existing contact's fields.
- Update a template
Update an email template, creating a new version.
- Update email
Reschedule a queued email's send time.
- Validate email address
Check whether an email address is valid and deliverable.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
Reviews
What our customers say
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Questions
Mattermost and PostStack, answered
What can start an automation from Mattermost?
Any of Mattermost's 2 triggers in the catalog, including New Channel and New user. Describe the moment in plain language and your agent picks the right one.
What can your agent do in PostStack when something happens in Mattermost?
Any of PostStack's 31 actions, including Send an email, Send broadcast, Send emails in batch and Update a contact. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from PostStack to Mattermost?
Yes. When something happens in PostStack, your agent can act in Mattermost too. This page covers both directions: PostStack's triggers and Mattermost's actions are listed here as well.
Do I have to build a connector for Mattermost or PostStack?
No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running.
Can my AI client use Mattermost and PostStack without building an automation?
Yes. With your AI client connected to APIANT, ask it to do something in either app once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running. One connection covers both.
What happens when something fails?
Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.
Is there a free plan?
Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.