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
Nodes: Sort: Date:
Generate procurement category strategies with OpenAI, Google Docs, and Gmail
Quick Overview This workflow is triggered by a webhook, pulls category spend plus supplier and market data via HTTP requests, uses OpenAI to generate a procurement category strategy, writes it into a ...
0
Oct 03, 2026
Track loan applications and send SLA alerts with Sheets, Gmail, Slack and Gemini
Quick overview This workflow monitors a Google Sheets loan application tracker, alerts the team in Slack for SLA breaches, escalates high-value loans by Gmail, sends Gemini-generated status update ema ...
0
Oct 03, 2026
Reply to LINE inquiries with Claude Haiku 4.5 and Gmail staff approval
Quick overview This workflow receives LINE Messaging API webhooks, drafts customer replies with Anthropic Claude using n8n Data Tables for stock and visit availability, and emails the draft to staff i ...
0
Oct 03, 2026
Triage customer feedback emails into deduplicated Linear issues with OpenAI
Quick overview This workflow monitors a Gmail inbox for unread customer feedback, uses OpenAI to triage and deduplicate requests against existing Linear issues, and then creates a new issue, adds a co ...
0
Oct 03, 2026
Generate UGC e-commerce video ads with GPT-4o Vision, Gemini 2.5 Pro and Sora 2
Quick overview This workflow collects a product image URL and product name from an n8n form, uses OpenAI Vision to build an ideal UGC creator persona, uses Google Gemini to generate three 12‑second ...
0
Oct 03, 2026
Write and send personalized cold email sequences with Gemini, Google Sheets and Gmail
Quick overview Turn any lead list into cold emails that sound written by hand. AI reads each lead's website, writes the email and a follow-up from your offer brief, and a quality check stops spammy co ...
0
Oct 02, 2026
Chase unpaid invoices with Google Sheets, Gmail, and Claude
Quick overview This workflow runs on a schedule or manually to read unpaid invoices from Google Sheets, checks recent client email history in Gmail, uses Anthropic Claude to decide whether to send or ...
0
Built by Hassan Hassan
Oct 02, 2026
Handle WhatsApp HVAC reception with Gemini, Claude, and Meta WhatsApp API
Quick overview This workflow acts as a WhatsApp AI receptionist: it receives text, voice notes, and photos via WhatsApp Cloud API, transcribes audio and describes images through OpenRouter, then uses ...
0
Built by Hassan Hassan
Oct 02, 2026
Track and store open job listings with Firecrawl, OpenAI, and Airtable
Quick overview This workflow runs weekly to keep an Airtable jobs database up to date by validating or discovering each organisation’s career page with Firecrawl, extracting open roles with OpenAI, ...
0
Oct 02, 2026
Run a RAG Messenger chatbot with Facebook, Google Drive, Supabase, OpenAI and OpenRouter
Quick overview This workflow powers a Facebook Messenger chatbot that batches incoming user messages, answers with an OpenRouter chat model using RAG retrieval from a Supabase vector store, and keeps ...
0
Built by MADIAD MADIAD
Oct 02, 2026
Debug AI agent tool calls with OpenRouter, calculator and webhook
Quick overview This workflow gives a support agent a Calculator tool and a simulated order lookup tool, so you can compare a correct calculation, a found order and an empty lookup that still reports s ...
0
Oct 02, 2026
Tag and log AI refund decisions as searchable execution data with OpenRouter
Quick overview This workflow applies a demo refund policy, asks an AI agent to explain the decision, and saves the case and the final decision as custom execution data so you can find the run later. I ...
0
Oct 02, 2026
Detect silent refund reply failures with OpenRouter and webhook logs
Quick overview This workflow shows how a support agent can send a confident refund reply even when the order data behind it is missing or incomplete, and how to catch that with saved executions and a ...
0
Oct 02, 2026
Clean travel photos by removing people with Google Gemini and Google Drive
Quick overview This workflow provides an upload form that analyzes travel photos with Google Gemini, removes all people or only unselected people, then uploads the cleaned images to Google Drive and r ...
0
Oct 02, 2026
Score journalist requests and draft press pitches with Apify, OpenAI, Google Sheets and Telegram
Quick overview This workflow runs every morning to pull open journalist requests via Apify, score each request with OpenAI against your expertise, log all scores to Google Sheets, and send high-scorin ...
0
Oct 02, 2026
Reply to Facebook comments using RAG with Google Drive, Supabase, OpenAI and Postgres
Quick overview This workflow creates a Facebook Messenger chatbot that answers questions using a Supabase vector knowledge base built from PDFs in Google Drive, using OpenRouter for chat responses, Op ...
0
Built by MADIAD MADIAD
Oct 02, 2026
Route critical lab results using Google Sheets, Slack, Gmail, Gemini, and Twilio
Quick overview A lab result routing workflow that notifies the ordering physician by severity, using thresholds you control. Critical results trigger an immediate Slack and SMS alert with acknowledgme ...
0
Oct 02, 2026
Run budget-capped client AI agents with OpenAI and n8n data tables
Quick overview For agencies and freelancers who run one AI agent for several paying clients. Each client has a monthly budget, a pause switch and its own instructions in an n8n Data table. A run start ...
0
Oct 02, 2026
Triage and route Gmail leads with Groq, Notion CRM, and Twilio calls
Quick Overview This workflow checks unread Gmail messages every hour, uses Groq-hosted LLM prompts to triage importance and route emails to the right manager, then updates a Notion CRM database, forwa ...
0
Oct 02, 2026
Send daily JLPT kanji-safe lessons to Microsoft Teams with Sheets and Claude
Quick overview This workflow runs daily, reads your learned kanji and JLPT grammar lists from Google Sheets, uses an AWS Bedrock chat model to generate and proofread a lesson constrained to known kanj ...
0
Built by Sukhman Sukhman
Oct 02, 2026