Auto-DM people who comment a keyword on Instagram

n8n: new comment → look up the post’s config in Google Sheets → build and send the DM with the link.

by /u/cuebicai23 Sep 2026

Prompt for your agent

Goal: Send a DM with a link to everyone who comments a keyword.
Setup: agents used in source: n8n; tools/MCPs stated: n8n, Google Sheets, Instagram.
Steps:
1. Trigger on new comments; get the post/reel ID and the comment keyword.
2. Search Google Sheets for the matching configuration (message + link).
3. Build the DM and send it.
Rules: ask me before anything irreversible (sending, posting, paying, deleting); don’t invent data, results or tools I haven’t given you; tell me what you couldn’t verify.
Based on: /u/cuebicai — https://www.reddit.com/r/n8n/comments/1wnwmlo/built_an_n8n_workflow_to_automatically_dm_people/

Steps are from the source. Includes a “Based on” credit line.

I tried this

Tell the next builder. One anonymous answer each; click again to undo.

Agents, models and tools only what the source states

Agents
n8n
Tools
  • n8n
  • Google Sheets
  • Instagram

Sources & credit