Templates / Send PDF document summaries with CoreNexis OCR, GPT-4.1-mini, GPT-4o-mini and Gmail

Send PDF document summaries with CoreNexis OCR, GPT-4.1-mini, GPT-4o-mini and Gmail

Needs changes

by isaWOW ✓ · 70 views · created 2026-05-26 · Document Extraction, AI Summarization

Needs changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.

What this workflow does

This AI workflow has 19 nodes and runs when someone submits an n8n form (“PDF Document Summarizer — Powered by CoreNexis”). Along the way it connects OpenAI Chat Model and Gmail. It also calls api.corenexis.com over HTTP.

How it runs

Trigger: When someone submits an n8n form (“PDF Document Summarizer — Powered by CoreNexis”).

2. Code — Prepare PDF Data (Code): runs custom JavaScript code
3. HTTP — CoreNexis OCR Submit (HTTP Request): calls api.corenexis.com (POST)
4. Code — Get Job ID (Code): runs custom JavaScript code
5. Wait — 4 Seconds (Wait): waits 4 seconds
6. HTTP — Poll OCR Status (HTTP Request): calls an HTTP API
7. Code — Merge Status (Code): runs custom JavaScript code
8. IF — Still Processing? (If): checks a condition and branches into true / false
9. Wait — 1 Minute Retry (Wait): waits 1 minutes
10. IF — OCR Completed? (If): checks a condition and branches into true / false
11. HTTP — Download Extracted Text (HTTP Request): calls an HTTP API

…plus 6 more steps. See the full node list below.

Services it uses

OpenAI Chat Model Gmail

HTTP calls to: api.corenexis.com

Before you upgrade to n8n 3.0

1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:

AI Agent v1 (old agent modes) in 13. AI Agent — Generate Document Summary (v1.7), 15. AI Agent — Generate HTML Email (v1.7): replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.

Rather not rewrite it? Many of these flows can be rebuilt in Make (free plan).

Removed in 3.0	Replace with
AI Agent v1 (old agent modes) 13. AI Agent — Generate Document Summary (v1.7), 15. AI Agent — Generate HTML Email (v1.7)	Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.

Nodes used (8)

n8n Form Triggern8n-nodes-base.formTrigger
Coden8n-nodes-base.code
HTTP Requestn8n-nodes-base.httpRequest
Waitn8n-nodes-base.wait
Ifn8n-nodes-base.if
AI Agent@n8n/n8n-nodes-langchain.agent
OpenAI Chat Model@n8n/n8n-nodes-langchain.lmChatOpenAi
Gmailn8n-nodes-base.gmail

From the author

Quick overview Upload any PDF through a form and this workflow extracts the full text using CoreNexis OCR, generates a structured 5-section summary with GPT-4.1-mini, converts it into a branded HTML email with GPT-4o-mini, and delivers it to your inbox…
Excerpt from isaWOW's description on n8n.io.

View the original on n8n.io → Check your own copy

Send PDF document summaries with CoreNexis OCR, GPT-4.1-mini, GPT-4o-mini and Gmail

What this workflow does

How it runs

Services it uses

Before you upgrade to n8n 3.0

Nodes used (8)

From the author

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