`, and `
` for formatting
+ - JSON output enabled to directly parse response
+ - Key Expressions: Injects aggregated articles string into prompt using `{{ $json.aggregatedArticles }}`
+ - Inputs: Aggregated prompt string from Code node
+ - Outputs: JSON containing `subject` and `body` keys with newsletter content
+ - Edge Cases:
+ - API key or quota issues with OpenAI
+ - Unexpected output format or parsing errors if GPT response deviates from JSON spec
+ - Version Requirement: Node supporting Langchain and OpenAI API v1.8+
+
+---
+
+#### 2.5 Newsletter Delivery
+
+**Overview:**
+Sends the AI-generated newsletter as an HTML email via Gmail to configured recipients.
+
+**Nodes Involved:**
+- Send Newsletter via Gmail
+
+**Node Details:**
+
+- **Send Newsletter via Gmail**
+ - Type: Gmail
+ - Role: Sends the newsletter email using OAuth2 authentication
+ - Configuration:
+ - Recipient email address configured in `sendTo` field (should be updated by user)
+ - Email subject and HTML body dynamically mapped from GPT node’s JSON output (`subject` and `body`)
+ - Attribution disabled for clean formatting
+ - Inputs: JSON with newsletter content from GPT node
+ - Outputs: Standard Gmail node output (success/failure info)
+ - Credentials: Gmail OAuth2 account configured
+ - Edge Cases:
+ - Authentication failure or expired token
+ - Invalid recipient email
+ - Gmail API rate limits or sending restrictions
+ - Version Requirement: Node version 2.1+
+
+---
+
+### 3. Summary Table
+
+| Node Name | Node Type | Functional Role | Input Node(s) | Output Node(s) | Sticky Note |
+|--------------------------------------------|----------------------------|----------------------------------------------|------------------------------------|------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------|
+| Start Workflow Manually | Manual Trigger | Entry point to start workflow manually | - | Get Website URLs from Google Sheet | ### 🌐 Get Website Content Using Dumpling AI: This section starts with a manual trigger, then fetches URLs from Google Sheets. |
+| Get Website URLs from Google Sheet | Google Sheets | Reads article URLs from Google Sheets | Start Workflow Manually | Crawl and Extract Site Content with Dumpling AI | |
+| Crawl and Extract Site Content with Dumpling AI | HTTP Request | Calls Dumpling AI crawl API to extract content | Get Website URLs from Google Sheet | Split Extracted Results into Individual Items | |
+| Split Extracted Results into Individual Items | SplitOut | Splits array of articles into individual items | Crawl and Extract Site Content with Dumpling AI | Map Title, URL, and Page Text | |
+| Map Title, URL, and Page Text | Set | Maps and cleans article fields | Split Extracted Results into Individual Items | Combine Articles into Single Prompt Format | |
+| Combine Articles into Single Prompt Format | Code | Aggregates all articles into one formatted string | Map Title, URL, and Page Text | Generate HTML Newsletter with Subject Using GPT-4o | ### 🧠 Summarize and Email AI-Generated Newsletter: Formats articles for GPT-4o summarization and sends email via Gmail. |
+| Generate HTML Newsletter with Subject Using GPT-4o | OpenAI (Langchain) | Generates newsletter subject and HTML body | Combine Articles into Single Prompt Format | Send Newsletter via Gmail | |
+| Send Newsletter via Gmail | Gmail | Sends AI-generated newsletter via email | Generate HTML Newsletter with Subject Using GPT-4o | - | |
+| Sticky Note | Sticky Note | Describes Dumpling AI crawling block | - | - | ### 🌐 Get Website Content Using Dumpling AI: This section starts with a manual trigger, then fetches URLs from Google Sheets. |
+| Sticky Note1 | Sticky Note | Describes AI summarization and email sending | - | - | ### 🧠 Summarize and Email AI-Generated Newsletter: Formats articles for GPT-4o summarization and sends email via Gmail. |
+
+---
+
+### 4. Reproducing the Workflow from Scratch
+
+1. **Create a Manual Trigger Node**
+ - Node Type: Manual Trigger
+ - Purpose: To start the workflow on demand
+ - No special parameters required
+ - Position near the left side of the canvas
+
+2. **Add a Google Sheets Node**
+ - Node Type: Google Sheets
+ - Purpose: Read article URLs from a configured Google Sheet
+ - Parameters:
+ - Document ID: Set to your Google Sheet’s document ID containing URLs
+ - Sheet Name: Set to your tab name (e.g., "Sheet1")
+ - Authentication: Connect your Google account using OAuth2 credentials
+ - Connect Manual Trigger output to this node’s input
+
+3. **Add HTTP Request Node to Call Dumpling AI**
+ - Node Type: HTTP Request
+ - Purpose: POST URLs to Dumpling AI `/crawl` API to extract article content
+ - Parameters:
+ - URL: `https://app.dumplingai.com/api/v1/crawl`
+ - Method: POST
+ - Authentication: HTTP Header with your Dumpling AI API key credential
+ - Body Content Type: JSON
+ - Body JSON:
+ ```json
+ {
+ "url": "{{ $json.websites }}",
+ "limit": "5",
+ "depth": "2",
+ "format": "text"
+ }
+ ```
+ - Connect Google Sheets output to this node
+
+4. **Add SplitOut Node**
+ - Node Type: SplitOut
+ - Purpose: Split the `results` array from Dumpling AI response into individual article items
+ - Parameters:
+ - Field to split out: `results`
+ - Connect HTTP Request node output to this node
+
+5. **Add Set Node to Map Article Fields**
+ - Node Type: Set
+ - Purpose: Extract and store `metadata.title`, `metadata.original_url`, and `content` fields for each article
+ - Parameters: Assign fields:
+ - `metadata.title` = `{{$json.metadata.title}}`
+ - `content` = `{{$json.content}}`
+ - `metadata.original_url` = `{{$json.metadata.original_url}}`
+ - Connect SplitOut node output to this node
+
+6. **Add Code Node to Aggregate Articles**
+ - Node Type: Code
+ - Purpose: Concatenate all articles into a single formatted string prompt for GPT
+ - Parameters: Use the following JavaScript code:
+ ```javascript
+ let output = '';
+ items.forEach((item, index) => {
+ const title = item.json.metadata?.title || 'No title';
+ const url = item.json.metadata?.original_url || 'No URL';
+ const content = item.json.content || 'No content';
+
+ output += `${index + 1}. ${title}\n${url}\n${content}\n\n`;
+ });
+
+ return [{ json: { aggregatedArticles: output } }];
+ ```
+ - Connect Set node output to this node
+
+7. **Add OpenAI Node (Langchain OpenAI)**
+ - Node Type: OpenAI (Langchain)
+ - Purpose: Generate newsletter subject line and HTML body from aggregated articles
+ - Parameters:
+ - Model ID: `gpt-4o`
+ - Prompt Message:
+ ```
+ You are a newsletter assistant that creates a compelling subject line and summarizes a list of articles in engaging, well-structured HTML format.
+
+ Instructions:
+
+ 1. Read the list of articles. Each article includes a title, content, and original URL.
+ 2. First, generate a short, catchy subject line for the newsletter based on the overall theme of the articles.
+ 3. Then, for each article:
+ - Write the title inside an
tag. + - Below the summary, write: “To read more, click the link:” and include the original URL as a clickable link inside another
tag.
+ - Add a
to separate entries.
+
+ Return the result in this JSON format:
+
+ {
+ "subject": "[Newsletter subject line]",
+ "body": "[HTML body with all the articles]"
+ }
+
+ Only output the JSON. Do not explain anything else.
+
+ Here is the input: {{ $json.aggregatedArticles }}
+ ```
+ - Enable JSON output parsing
+ - Authentication: Connect your OpenAI API credentials
+ - Connect Code node output to this node
+
+8. **Add Gmail Node**
+ - Node Type: Gmail
+ - Purpose: Send the newsletter email with generated subject and HTML body
+ - Parameters:
+ - Send To: Enter recipient email(s)
+ - Subject: `={{ $json.message.content.subject }}` (map from OpenAI node output)
+ - Message (Body): `={{ $json.message.content.body }}`
+ - Disable ‘append attribution’ for clean formatting
+ - Authentication: Connect your Gmail OAuth2 credentials
+ - Connect OpenAI node output to this node
+
+---
+
+### 5. General Notes & Resources
+
+| Note Content | Context or Link |
+|-----------------------------------------------------------------------------------------------|-----------------------------------------------|
+| Dumpling AI is used for crawling and extracting web articles efficiently. | https://app.dumplingai.com |
+| Workflow can be easily scheduled by replacing manual trigger with a Schedule node. | n8n documentation on Schedule node |
+| GPT-4o model provides advanced AI summarization capabilities for newsletter creation. | OpenAI GPT-4o model documentation |
+| Gmail node requires OAuth2 authentication; ensure credentials have email sending permissions. | Google Cloud Console and Gmail API setup guides |
+| Workflow design allows easy customization such as changing AI tone, adding filters, or output | Flexible for Slack, Airtable, Notion integrations |
+| Sticky notes added in the workflow provide helpful context for block purposes and usage tips. | Embedded within the workflow canvas |
+
+---
+
+**Disclaimer:** The text above is generated from an automated workflow designed with n8n, respecting all applicable content policies. It contains no illegal or protected content and processes only legal, public data.
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