Segment Typeform NPS into MailerLite, alert detractors in Slack

Build a code workflow that routes every new Typeform NPS or feedback survey response into MailerLite with deterministic segmentation, and pings a Slack channel for any detractor.

Trigger: Typeform webhook. Use Typeform's Create or Update Webhook operation to register the workflow's incoming URL against the survey form, so the workflow runs whenever a new response is submitted.

From the webhook payload, extract three things: the respondent email, the NPS score (the numeric answer), and the free-text comment (the follow-up text answer). Also capture the response submitted_at timestamp as the survey date.

Step 1. Call MailerLite's Create or Update Subscriber with the email. Pass custom fields for nps_score, nps_comment, and survey_date. This upserts on email, so repeat respondents update in place instead of duplicating.

Step 2. Bucket the score deterministically: 9 or 10 is promoter, 7 or 8 is passive, 6 or below is detractor. Then call MailerLite's Assign Subscriber to Group with the matching group ID so downstream MailerLite automations (thank-you for promoters, win-back for detractors) fire correctly. The three group IDs should be configurable inputs on the workflow.

Step 3. If the bucket is detractor, call Slack's Send a Message into a customer success channel. The message should include the email, the score, and the verbatim comment, formatted clearly so a CSM can read it at a glance and reach out the same day. The Slack channel ID should also be a configurable input.

Promoters and passives should not produce a Slack message; they are handled entirely by the MailerLite automations attached to their group.

Keep the code path strictly deterministic: no LLM calls, no scoring agent. The score-to-bucket mapping, the field mapping, and the routing rule are all fixed logic.