Update Brex budgets from Slack approval reactions
Make a lightweight approval signal actionable so a budget update does not wait for someone to revisit the thread.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
Update Budget
Update budget details.
Why this helps
A decision marked in Slack can still require a separate memory-intensive step to update the budget.
- Turn a deliberate reaction into a clear follow-through cue.
- Reduce the need to remember an approved budget update later.
- Keep action connected to the message being approved.
Setup
Build it in a few focused steps.
- 1Connect Slack and Brex to Notis once in the portal.
- 2Create the automation in the portal, or ask Notis conversationally.
- 3In one prompt, tell Notis which approval reaction means update an identified Brex budget and what confirmation context is required.
- 4Select the Slack message reaction added trigger, with the relevant channel or emoji filter if available, and choose a report channel.
- 5Test on one real budget request using the agreed approval reaction.
Questions about this workflow
Can any emoji trigger a budget update?
Use a deliberate approval reaction and specify it clearly in the instruction and trigger settings.
What if the message does not identify a budget?
Require a clear budget reference in the prompt so ambiguous reactions do not lead to an update.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Brex. A trigger fires from one place; an action lands in another.
Slack triggers
Brex actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Create Budget
Create a new budget for departments or projects.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Create Card
Create a new card and assign it to a user.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Create Department
Create a new department.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Create Expense
Create a new expense.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Create Location
Create a new location.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Create Job Title
Create a new job title.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Create User
Create a new user in the brex account.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Create Vendor Card
Create a new vendor card.
Connect any two apps with Notis in the middle.
Slack and Brex, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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No card. Works with personal or business Brex.