Bridge two-way SMS conversations between Android and Slack with Relayion
UnknownUnknown. This template uses community nodes we can't verify statically. Uses community nodes that can't be verified statically (unverified community packages are off by default in 3.0). Static check, last run 2026-10-19.
What this workflow does
This workflow has 12 nodes and runs on Relayion events (inbound.received) (plus 1 other trigger). Along the way it connects Slack and Relayion (community). It also calls slack.com over HTTP.
How it runs
Trigger: On Relayion events (inbound.received) (plus 1 other trigger).
- Set Slack Channel ID (Edit Fields (Set)): sets 1 field: slackChannelId
- Check If Threaded Reply (If): checks a condition and branches into true / false
- Prepare Slack Message Text (Edit Fields (Set)): sets or maps fields
- Fetch Slack Thread Messages (HTTP Request): calls slack.com
- Post Message to Slack (Slack): uses Slack
- Extract Phone and Reply Details (Code): runs custom JavaScript code
- Relay SMS Reply (Relayion): uses Relayion
- If: checks a condition and branches into true / false
- Post Success Reaction (Slack): work with reaction
- Post Failure Reaction (Slack): work with reaction
Services it uses
HTTP calls to: slack.com
Before you upgrade to n8n 3.0
We can't fully verify this one: it relies on 2 community packages, and n8n 3.0 turns unverified community packages off by default (N8N_UNVERIFIED_PACKAGES_ENABLED=false).
- Check that n8n-nodes-relayion is verified or supports 3.0 (used in When SMS Received).
- Check that n8n-nodes-relayion is verified or supports 3.0 (used in Relay SMS Reply).
- Also check Slack Trigger requires a signing secret on the Slack API credential.
Nodes used (8)
- Relayion Trigger
n8n-nodes-relayion.relayionTrigger - Edit Fields (Set)
n8n-nodes-base.set - Slack Trigger
n8n-nodes-base.slackTrigger - If
n8n-nodes-base.if - HTTP Request
n8n-nodes-base.httpRequest - Code
n8n-nodes-base.code - Relayion
n8n-nodes-relayion.relayion - Slack
n8n-nodes-base.slack
From the author
Quick overview This workflow uses Relayion and Slack to mirror inbound SMS messages into a Slack channel and let teammates reply in a Slack thread to send an SMS back to the original sender, adding a ✅ or ❌ reaction to confirm whether the outgoing text was…