Get a clear Slack alert when Brex spend needs attention
Send a Brex spend exception into Slack with the key details and a practical next step, so it is easier to act without reopening several tabs.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Post message to channel
Deprecated: posts a message to a slack channel, direct message, or private channel. use `send message` instead.
Why this helps
Spend exceptions can disappear into a queue while the team is focused elsewhere, leaving founders to remember which transaction needs review.
- Bring a flagged spend item into the team's existing conversation space.
- Summarize the merchant, amount, and relevant context in one message.
- Make the requested follow-up visible without manually rewriting transaction details.
Setup
Build it in a few focused steps.
- 1Connect Brex and Slack once in the Notis portal.
- 2Create an automation in Automations, New Automation, and give it a clear name.
- 3In one instruction, ask Notis to review the incoming Brex spend exception and post its key details and next step in Slack.
- 4Choose a webhook trigger and select where Notis should send run reports.
- 5Test with one real Brex spend exception and check the Slack message for accuracy.
Questions about this workflow
What starts this automation?
A Notis webhook starts it when an HTTP request arrives. Brex does not expose a trigger event in this workflow context, so the webhook payload must provide the spend exception or transaction details.
Does the automation approve or change the Brex transaction?
No. This workflow posts a Slack message for review and follow-up; it does not approve, reject, or modify Brex data.
What if the webhook does not include a merchant or amount?
Notis can only summarize details present in the request or otherwise provided to it. Include the needed transaction context in the webhook payload.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Brex to Slack. A trigger fires from one place; an action lands in another.
Brex triggers
Slack actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Add a custom emoji to a Slack team
Deprecated: adds a custom emoji to a slack workspace given a unique name and an image url. use `add emoji` instead.
Add an emoji alias
Adds an alias for an existing custom emoji in a slack enterprise grid organization.
Add a remote file
Adds a reference to an external file (e.g., google drive, dropbox) to slack for discovery and sharing, requiring a unique `external id` and an `external url` accessible by slack.
Add a star to an item
Stars a channel, file, file comment, or a specific message in slack.
Add call participants
Registers new participants added to a slack call.
Add emoji
Adds a custom emoji to a slack workspace given a unique name and an image url; subject to workspace emoji limits.
Add reaction to message
Adds a specified emoji reaction to an existing message in a slack channel, identified by its timestamp; does not remove or retrieve reactions.
Connect any two apps with Notis in the middle.
Brex and Slack, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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