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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Gate personal data before external sends with Jev, Google Sheets, Gmail, Telegram and gpt-6-luna
A payload only leaves your network when the gate says so. This workflow scores every outbound record for personal data before it reaches an external partner API, then blocks, allows or holds the send, ...
0
Oct 05, 2026
Score and route incidents with Jev Classification, Google Sheets, Gmail, Telegram, and GPT-6-Luna
A production incident report lands on a webhook and the right person is paged while everyone else is still reading the alert. This n8n workflow has Jev Classification score each incident for severity, ...
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Oct 05, 2026
Triage trust and safety reports with Jev Classification, Google Sheets, Gmail and Telegram
Triage trust and safety reports for a moderation team without losing the ones that matter. This workflow takes every report from your form webhook, sorts it into a policy category with Jev Classificat ...
0
Oct 05, 2026
Split and track WhatsApp restaurant bills with WAHA, Gemini and Sheets
Quick overview This workflow runs a WhatsApp bill-splitting bot using WAHA, Google Gemini for receipt OCR, OpenRouter for funny bill and reminder messages, and Google Sheets to track sessions, contact ...
0
Oct 05, 2026
Triage tender bids with OpenAI and Google Sheets
Tenders arrive and somebody has to decide whether they are worth the paperwork. This workflow takes each incoming tender, has gpt-6-luna score the fit out of 100 and flag the risks, logs the decision ...
0
Oct 05, 2026
Triage tender bid decisions with GPT-6 Luna and Google Sheets
Tenders arrive and somebody has to decide whether they are worth the paperwork. This workflow takes each incoming tender, has gpt-6-luna score the fit out of 100 and flag the risks, logs the decision ...
0
Oct 05, 2026
Track prior authorization requests and chase payer responses with OpenAI and Google Sheets
Prior authorization requests rarely fail loudly. They sit at the payer while the procedure date gets closer. This workflow logs every request as it leaves the clinic, has gpt-6-luna score packet compl ...
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Oct 05, 2026
Track retail layaway plans and payment reminders with gpt-6-luna and Google Sheets
Layaway plans are easy to start and easy to lose track of, which is where the money quietly walks out of the store. This workflow logs each new plan to Google Sheets, emails the customer their payment ...
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Oct 05, 2026
Track HVAC maintenance agreements and automate reminders with Google Sheets, Gmail, and OpenAI
Maintenance agreements only pay off when someone remembers the next service date. This n8n workflow takes a new agreement from a webhook, has gpt-6-luna write the welcome email, logs it to Google Shee ...
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Oct 05, 2026
Manage farm box shares and weekly harvest emails with gpt-6-luna, Google Sheets and Gmail
Farm box members change their plans, and someone has to catch every skip, pause and pickup swap before the next delivery. This n8n workflow takes each change request from a form, has gpt-6-luna classi ...
0
Oct 05, 2026
Track menu food costs and flag margin erosion with GPT-6-luna, Google Sheets and Gmail
Food cost creep is quiet. A supplier puts up the price of chicken, nobody updates the recipe card, and the damage only shows up at month end. This n8n workflow keeps every recipe cost current, recompu ...
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Oct 05, 2026
Approve pet boarding bookings and send vaccine reminders with Gmail, Sheets and OpenAI
Boarding bookings only get approved when the vaccination records actually hold up. This n8n workflow takes boarding requests from a form, checks rabies, DHPP and bordetella expiry dates against the st ...
0
Oct 05, 2026
Triage tender bid decisions with GPT-6-Luna and Google Sheets
Tenders arrive and somebody has to decide whether they are worth the paperwork. This workflow takes each incoming tender, has gpt-6-luna score the fit out of 100 and flag the risks, logs the decision ...
0
Oct 05, 2026
Collect and escalate security patrol reports with gpt-6-luna, Google Sheets, and Gmail
Patrol reports that reach the right person before the shift ends. This workflow takes guard reports from an n8n Form, has gpt-6-luna grade the severity and write a summary a supervisor can read in ten ...
0
Oct 05, 2026
Audit AI citation gaps with ChatGPT, Perplexity, Google Sheets, and Slack
Quick overview This weekly workflow audits how often your brand is named versus cited by link in ChatGPT (with web search) and Perplexity, then identifies which external pages win those citations, cla ...
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Oct 05, 2026
Register warranties and send GPT-4o-mini reminders with GoHighLevel and Sheets
Quick overview This workflow captures warranty registrations from an n8n Form or a webhook, saves each product to a Google Sheets warranty registry, and upserts the buyer into GoHighLevel with tags, n ...
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Built by Rahul Joshi Rahul Joshi
Oct 05, 2026
Triage construction project risk with Google Sheets, Open-Meteo, Gemini, and Gmail
Quick overview Youtube Video: https://youtu.be/Fh0QR48f9is This workflow runs every weekday morning, reads active construction projects and related data from Google Sheets, pulls a 7-day forecast fro ...
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Built by iamvaar iamvaar
Oct 05, 2026
Chase client documents with WhatsApp, Gmail, Google Sheets and GPT-4o-mini
Quick overview This workflow collects client document requests for a CA firm, creates a Google Drive folder and Google Sheets tracker entry, and sends upload links via WhatsApp Cloud API and Gmail, th ...
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Built by Rahul Joshi Rahul Joshi
Oct 05, 2026
Investigate fuel tank variances with Google Sheets, Gemini, and Slack
Quick overview Youtube Video: https://youtu.be/XHT46n4b1lg This workflow receives a shift-close webhook and reconciles fuel tank wet-stock in Google Sheets, optionally using Google Gemini to explain ...
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Built by iamvaar iamvaar
Oct 05, 2026
Triage irrigation incidents with Google Gemini, Open-Meteo, and Slack alerts
Quick overview This workflow ingests irrigation telemetry via a webhook, enriches it with hyperlocal weather from Open-Meteo, uses Google Gemini to classify incident severity and generate remediation ...
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Built by iamvaar iamvaar
Oct 05, 2026