Check flagged expenses with historical rates
Turn a reaction on a dated expense into the historical rate context needed to keep finance follow-up moving.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
Get Historical Rates
Tool to get historical exchange rate data for a specific date. use when you need past currency rates for all or selected currencies.
Why this helps
A finance question may be acknowledged with a reaction but still lack the rate information needed to resolve it.
- Prompt a historical lookup for a dated expense that needs review.
- Keep acknowledged finance questions from stalling.
- Tie the rate check to the original Slack message.
Setup
Build it in a few focused steps.
- 1Connect Slack and Fixer to Notis once through the portal.
- 2Create an automation in the portal, or ask Notis to check historical rates when a team member reacts to a dated expense message.
- 3Use a single plain-language instruction to retrieve the historical rate for the expense date and stated currencies.
- 4Select the Slack message reaction added trigger and a channel for run reports, then test by reacting to one dated expense message.
Questions about this workflow
Does a reaction provide the expense date?
No. The reacted-to message needs to contain the date and currencies, or the prompt should ask Notis to flag missing details.
Can I limit which reactions start it?
The Slack reaction trigger supports optional filtering by channel and emoji name.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Fixer. A trigger fires from one place; an action lands in another.
Slack triggers
Fixer actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Get Historical Rates
Tool to get historical exchange rate data for a specific date. use when you need past currency rates for all or selected currencies.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Get Latest Exchange Rates
Tool to get real-time exchange rate data for all available or specified currencies. use when you need current forex rates before performing currency conversions.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Get Supported Symbols
Tool to retrieve all supported currency symbols and their full names. use when you need to display or validate available currencies before performing conversions.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Connect any two apps with Notis in the middle.
Slack and Fixer, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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