Browse 7,043 n8n workflow templates in the Langchain category. These ready-to-use automations connect apps and services with n8n — no coding required. Click any workflow to explore its nodes and import it directly into n8n.

7,043 workflows in Langchain
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Send AI-written multi-channel ad performance PDFs with GA4, Google Ads, Meta and GoHighLevel
Quick overview This workflow runs monthly and builds a multi-channel client performance report by pulling KPIs from Google Analytics 4, Google Ads, and Meta Ads, generating an OpenAI executive summary ...
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Built by Rahul Joshi Rahul Joshi
Oct 01, 2026
Detect Meta Ads spend anomalies and creative fatigue with OpenAI and Slack
Quick overview This workflow runs daily and pulls Meta Ads account and ad insights from the Meta Graph API, detects spend/performance anomalies and creative fatigue, uses OpenAI (gpt-4o-mini) to propo ...
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Built by Rahul Joshi Rahul Joshi
Oct 01, 2026
Qualify IndiaMART and JustDial leads with OpenAI, GoHighLevel and WATI
Quick overview This workflow captures new leads from IndiaMART and JustDial webhooks, normalizes and deduplicates them, uses OpenAI (gpt-4o-mini) to qualify and draft a reply, then creates/updates the ...
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Built by Rahul Joshi Rahul Joshi
Oct 01, 2026
Query and edit UnoPim product catalogs with OpenAI GPT-4o and Slack
Quick overview A chat window for your UnoPim catalog. An OpenAI GPT-4o agent answers questions about your products and writes catalog data back through six UnoPim tools. Every reply is then routed by ...
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Built by UnoPim UnoPim
Oct 01, 2026
Create Veo 3.1 social videos from Google Sheets with Gemini and PostWire
Quick Overview This workflow runs daily, pulls the next “ready” video idea from Google Sheets, uses Google Gemini to write a Veo prompt and platform-specific captions, generates an 8‑second vert ...
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Built by PostWire PostWire
Oct 01, 2026
Reply to missed calls and book appointments with Twilio, Google, and GPT-4o
Quick overview Never miss a lead again: this workflow texts back missed callers via Twilio SMS and turns voice AI call summaries into Google Calendar bookings — with Sheets logging and owner alerts. ...
0
Oct 01, 2026
Screen contact activity from CSV with MCP client and OpenAI gpt-4o-mini
Quick Overview This workflow manually processes a contacts CSV, fetches website/Facebook/Instagram page text via an MCP browser endpoint, then uses OpenAI to classify each contact as active, inactive, ...
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Sep 30, 2026
Reply to property enquiries with Gmail, Google Sheets and GPT-4o
Quick overview This workflow polls a Gmail inbox for new property enquiries, uses OpenAI (GPT-4o) to extract applicant details and draft a personalised reply, matches the enquiry to a property list in ...
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Built by Ali Amin Ali Amin
Sep 30, 2026
Automate car service reminders and replies with Google Sheets, Gemini and Gmail
Quick overview This workflow runs every morning, reads auto repair customer data from Google Sheets, uses Google Gemini to draft service-due reminder emails, and sends them via Gmail (or a test copy t ...
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Built by Anna Cole Anna Cole
Sep 30, 2026
Detect contract compliance violations with Notion, Google Sheets and Groq
Quick overview This workflow runs daily to compare procurement transactions in Google Sheets against active contract terms stored in Notion, flags pricing/SLA/volume violations with calculated leakage ...
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Sep 30, 2026
Create human-approved Instagram posts with Gemini, Telegram, and Instagram
Quick Overview This workflow collects an Instagram post request via an authenticated n8n form, uses Google Gemini to draft a caption from a submitted image and verified facts, sends the draft to Teleg ...
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Sep 30, 2026
Answer procurement questions by role using Groq and Google Sheets
Quick overview This workflow receives procurement questions via n8n Chat or a webhook, looks up role and procurement records in Google Sheets, and uses Groq-hosted LLM agents to generate a role-restri ...
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Sep 30, 2026
Label search intent from Google SERPs with DataForSEO, OpenRouter and Sheets
Quick overview Reads pending keywords from Google Sheets, pulls Google's top 10 with DataForSEO (optionally page content, search volume and traffic per URL), groups the results into search intents wit ...
0
Sep 30, 2026
Build and deploy tested workflows from chat with Claude Sonnet
Quick overview Describe an automation in one sentence in chat. Claude turns it into an n8n workflow. The workflow is checked against n8n's own node catalog, tested or reviewed, and saved to your insta ...
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Sep 30, 2026
Run an English website chatbot with OpenAI GPT-5 and Qdrant
Quick Overview This workflow exposes a secured webhook that powers an English website chatbot, using OpenAI for intent detection and responses and Qdrant (with optional Cohere reranking) to retrieve r ...
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Built by Paolo Ronco Paolo Ronco
Sep 30, 2026
Turn YouTube comments into audience insights with YouTube API and Google Gemini
Quick overview Paste a public YouTube video URL and use Gemini to mine real viewer comments for recurring questions, problems, objections, tutorial requests, content opportunities, and product or serv ...
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Sep 30, 2026
Batch structured AI calls via OpenRouter, Data Tables, and webhooks
Quick overview Give an AI coding agent one authenticated webhook for structured LLM batches. The agent prepares prompts and JSON schemas in a script; n8n processes the first 50 calls in parallel, retu ...
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Sep 30, 2026
Post a daily multi-topic news digest to Slack and Google Sheets with Webz.io and GPT-4.1-mini
Quick overview This workflow runs daily at 08:00 to search Webz.io news for multiple topics, uses OpenAI GPT-4.1-mini to curate a structured digest, posts the digest to Slack, and archives each select ...
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Built by Webz.io Webz.io
Sep 30, 2026
Provide plant care chat and photo analysis with LINE and Google Gemini
Quick overview This workflow turns a LINE Official Account into a plant care assistant that can analyze plant photos and answer follow-up questions, using Google Gemini for AI responses and n8n Data T ...
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Sep 30, 2026
Reply to Facebook comments with OpenRouter, Supabase, Postgres and Google Drive
Quick overview This workflow auto-replies to Facebook Page comments using an OpenRouter-powered AI Agent with Postgres chat memory and a Supabase vector knowledge base, while keeping that knowledge ba ...
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Built by MADIAD MADIAD
Sep 30, 2026