Estimate Fal.ai generation costs from Slack
Before you start a media-generation job, send the Fal.ai endpoint and planned number of units in a private Slack message and get an estimate to review.
Trigger
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Action
Estimate Pricing
Tool to estimate pricing for fal.ai model endpoints. Use when you need to calculate expected costs for API calls or unit-based usage across one or more endpoints.
Why this helps
It is easy to start a generation workflow without first checking the expected cost for the chosen model and volume.
- Review an expected price before submitting any generation request.
- Avoid extra back-and-forth by requiring the endpoint and usage volume up front.
Setup
Build it in a few focused steps.
- 1Connect Slack and Fal.ai to Notis once in the portal.
- 2Create the automation in the portal or ask Notis for it in plain language.
- 3Tell Notis to estimate pricing only when a private Slack DM explicitly requests it and includes a Fal.ai endpoint and planned usage units; do not submit a generation job.
- 4Select Slack Direct Message Received and keep run reports in a private channel.
- 5Test with a known endpoint and representative usage volume, then review the estimate before any separate generation step.
Questions about this workflow
Does this generate an image, video, or audio file?
No. The listed Fal.ai action only estimates pricing. It does not submit a model request or generate media.
Can it estimate without an endpoint and usage volume?
No. The instruction should ask for the missing model endpoint or units rather than guessing.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Fal.ai. A trigger fires from one place; an action lands in another.
Slack triggers
Fal.ai actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Cancel Queue Request
Tool to cancel a queued or in-progress request in fal.ai's queue system. Use when you need to stop a request before it completes. Note that cancellation only succeeds if the request hasn't started processing; if already completed, returns an error status. Even with successful cancellation, the request may still execute if it was near the front of the queue.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Estimate Pricing
Tool to estimate pricing for fal.ai model endpoints. Use when you need to calculate expected costs for API calls or unit-based usage across one or more endpoints.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Get JWKS for Webhook Verification
Tool to retrieve public keys for webhook signature verification. Returns a JSON Web Key Set containing ED25519 public keys. Use when you need to verify webhook signatures from fal.ai. The keys are cacheable but should be refreshed at least every 24 hours.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Get Models
Tool to discover and search fal.ai model endpoints. Use when you need to list all models, find specific models by ID, or search by category/query. Supports pagination and optional expansion of OpenAPI schemas.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Get Model Pricing
Tool to retrieve unit pricing for model endpoints. Returns pricing information including unit price, billing unit, and currency. Use when you need to check costs for specific fal.ai models.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Get Queue Request Result
Tool to retrieve the final result of a completed queue request. Use when you need to get the output of a model request that was submitted to the queue and has finished processing. Only works after request status transitions to COMPLETED.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Get Queue Request Status With Logs
Tool to retrieve the current status of a queued request with detailed logging information. Use when you need to monitor a queued request's progress and access execution logs for debugging or tracking purposes. Logs include timestamps, severity levels, and detailed messages about request processing.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Check Queue Request Status
Tool to check the status of a queued request in fal.ai. Use when you need to monitor the progress of an async request. Returns different information based on status: queue position when IN_QUEUE, logs when IN_PROGRESS or COMPLETED.
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When this happens · Trigger
Do this · Action
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