Request a phone check with a Slack reaction
Mark a message for a Callerapi lookup with a reaction, so a number check can happen without another written request.
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 Phone Number Information
Tool to retrieve detailed information about a specific phone number, including reputation, business and carrier details, and ftc complaints. use when the number is in e.164 format and set hlr=true to include hlr data (adds 1-3 seconds to response).
Why this helps
When you are moving fast, writing a separate instruction for every follow-up creates friction and makes requests easier to forget.
- Use a familiar reaction as a signal for a lookup.
- Limit lookups to messages marked for attention through your prompt.
- Keep the original message as the context for the check.
Setup
Build it in a few focused steps.
- 1Connect Slack and Callerapi to Notis once through the portal.
- 2Create a new automation and write a plain-language prompt specifying the reaction and E.164 number lookup.
- 3Choose Message Reaction Added as the trigger and select the reaction if the trigger offers filtering.
- 4Choose a channel for run reports, then test by reacting to a message containing a real E.164 number.
Questions about this workflow
Can I choose which reaction starts the lookup?
The trigger supports optional emoji filtering. State the intended reaction in your prompt and select it in the trigger if available.
Does the reaction trigger read DMs?
Use this workflow for a message reaction event in Slack. The trigger description does not specify DM coverage.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Callerapi. A trigger fires from one place; an action lands in another.
Slack triggers
Callerapi actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Get Phone Number Information
Tool to retrieve detailed information about a specific phone number, including reputation, business and carrier details, and ftc complaints. use when the number is in e.164 format and set hlr=true to include hlr data (adds 1-3 seconds to response).
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Get User Information
Tool to retrieve information about the authenticated user, including email and credit usage details. use after authentication to fetch credits spent, monthly allocation, and credits left.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
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 Callerapi, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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