AI-native automation
Automate work across
eFax and 
Slackwith Caddi AI Agents.
Automate anything you do across eFax, Slack, and the rest of your tools. Sign in, show or tell Caddi what you want, and it runs end to end. No workflow builder.
How to connect eFax and Slack
Connect eFax to Caddi
Allow1Sign in to eFax
One click with your own eFax login. No API keys.
Connect Slack to Caddi
Allow2Sign in to Slack
The same click again. Both tools are connected.
Send channel message in Slack when fax received in eFax.
ScreenshareType it3Show or tell it
Screenshare the job, or type it in chat. Change it any time.
- Running
14 done1 for review
4Watch it run
Caddi does the work and flags anything unsure for review.
What Caddi is and how it works
An AI teammate that runs your back-office loops.
- Doesn't break. Caddi reads intent, so when fields move or UIs change, your loop keeps running.
- Taught like a new hire. Walk Caddi through the work once. Tweak it later by chat, with no workflow builder to re-architect.
SOC 2 attested · Human-in-the-loop · Full audit trail · 150+ tools across legal, finance, and operations
Practical ways to use eFax and Slack together
- 01
Send channel message in Slack when fax received in eFax.
Caddi watches eFax for fax received and send channel message in Slack. No copy-paste, no missed records.
- 02
Send fax in eFax when new message in channel in Slack.
Caddi watches Slack for new message in channel and send fax in eFax so the two systems stay in lockstep.
- 03
Send direct message in Slack from eFax events.
When fax delivered happens in eFax, Caddi send direct message in Slack with the right context attached.
Actions Caddi can take across eFax and Slack
- eFax
Fax received
Triggers when an inbound fax arrives.
- eFax
Fax delivered
Triggers when an outbound fax is delivered.
- eFax
Fax failed
Triggers when an outbound fax fails to send.
- eFax
Send fax
Send a document to a fax number.
- eFax
Download fax
Fetch the image and details of a received fax.
- eFax
Search faxes
Find sent or received faxes by date or number.
- Slack
New message in channel
Triggers when a new message is posted to a channel.
- Slack
New mention
Triggers when the bot or a user is @-mentioned.
- Slack
New reaction added
Triggers when a reaction is added to a message.
- Slack
Send channel message
Post a message to a Slack channel.
- Slack
Send direct message
Send a DM to a user.
- Slack
Upload file
Upload a file to a channel or DM.
- Slack
Set channel topic
Update a channel's topic.
Common questions
How does Caddi connect eFax and Slack?
eFax and Slack just run together. You teach Caddi the way you'd teach a new hire: walk it through how you use them today, with no workflow builder to wire up. Caddi turns that walkthrough into a verified loop and runs it against eFax and Slack end-to-end.
Do I need engineering help?
No. Whoever does the work today walks Caddi through it on a call, the same way they'd train a new hire. Caddi builds the loop. No code, no IT ticket.
Is my data safe?
Yes. Caddi is SOC 2 attested. The AI watches and builds the automation, and once the loop ships it runs as deterministic code, repeatable and logged, with any model step scoped and reviewable.
Can Caddi connect eFax and Slack to other tools too?
Yes. Most Caddi loops span 3–6 tools. Once the first eFax + Slack loop is live, Caddi suggests other tools and other workflows to fold in.
How fast can it go live?
Typical first loops ship within a week of that first walkthrough. The Caddi team reviews every loop before it runs in production.
Ready to automate eFax and Slack?
Drop your work email and we'll show you Caddi running end-to-end against eFax, Slack, and the rest of your stack.
Or skip the demo: sign up free and build it yourself.