{ "id": "IgeWI32LKSmgs8Qj", "meta": { "templateCredsSetupCompleted": true }, "name": "Create & track LinkedIn posts with Google Sheets, GPT-5.1, Unsplash, and Sona", "tags": [], "nodes": [ { "id": "22fd2b45-cc9c-480f-afa7-ba6d1f414f3b", "name": "Get Image in Unsplash", "type": "n8n-nodes-base.httpRequest", "onError": "continueRegularOutput", "position": [ 1040, 896 ], "parameters": { "url": "https://api.unsplash.com/search/photos", "options": {}, "sendQuery": true, "sendHeaders": true, "queryParameters": { "parameters": [ { "name": "query", "value": "={{ $('AI Content Generation').first().json.output.image_prompt }}" }, { "name": "per_page", "value": "10" } ] }, "headerParameters": { "parameters": [ { "name": "Authorization" } ] } }, "typeVersion": 4.2 }, { "id": "63a51ad9-6aef-4c51-bea7-1776a5e5d2ae", "name": "Sticky Note4", "type": "n8n-nodes-base.stickyNote", "position": [ -896, -64 ], "parameters": { "width": 592, "height": 1344, "content": "# Create & track LinkedIn posts with Google Sheets, GPT-5.1, Unsplash, and Sona\n\nThis workflow generates professional LinkedIn posts using AI, intelligently selects relevant images from Unsplash, sends content for email approval, and publishes directly to LinkedIn.\n\n**How it works:**\n1. Checks Google Sheet daily at midnight for posts marked \"Ready\"\n2. Generates engaging LinkedIn content using GPT-4 with custom tone/audience\n3. Performs automatic quality checks (character limits, hashtags)\n4. Searches Unsplash for 10 relevant images based on post content\n5. Uses AI to intelligently select the best image that matches your post's message and tone\n6. Formats post as HTML with selected image and sends to your email for approval\n7. If approved: posts to LinkedIn with AI-selected image\n8. If rejected: updates sheet status to \"Rejected\" for review\n9. Updates sheet status to \"Posted\" upon successful publication\n\n\n**Setup Requirements:**\n- Create a Google Sheet with columns: Topic/Subject, Content Type, Tone, Target Audience, Additional Notes, Image link for your post (optional), Include Image?, Status\n- Connect OpenAI API with your API key (used for both content generation and image selection)\n- Connect Unsplash API with your access key\n- Connect Gmail OAuth2 and update recipient email in approval node\n- Connect Google Sheets OAuth2 and select your sheet from dropdown\n- Connect LinkedIn OAuth2 for posting\n\n\n**Scheduling Options:**\n- Default: Runs daily at midnight\n- Customizable: Change Schedule Trigger node to run hourly, weekly, or at specific times\n- The \"Limit\" node ensures only one post processes per run\n\n\n**Sheet Usage:**\n- Set Status to \"Ready\" to trigger content generation\n- Status changes: Ready \u2192 In Progress \u2192 Rejected (if disapproved) OR Posted (if approved)\n- Add image URL in \"Image link for your post\" column to use your own image (optional)\n- If no image URL provided, AI searches Unsplash and selects the most relevant image\n- Set \"Include Image?\" to \"No\" if you want text-only post\n- Review \"Rejected\" posts, edit if needed, and change back to \"Ready\" to retry\n\n\n**Image Selection Process:**\n- Searches Unsplash using keywords generated based on the linkedIn post.\n- Retrieves 10 professional, high-quality images\n- Uses AI to analyze each image's description and relevance\n- Selects the single best image that enhances your post's message\n- Ensures professional, LinkedIn-appropriate imagery\n\n\n**Note:** Workflow includes approval gate - nothing posts without your explicit email confirmation. All images are sourced from Unsplash's professional library and selected by AI for maximum relevance and engagement." }, "typeVersion": 1 }, { "id": "4471baae-6042-4fcf-b6a9-210a754802f9", "name": "OpenAI Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ 560, 336 ], "parameters": { "model": { "__rl": true, "mode": "list", "value": "gpt-5.1", "cachedResultName": "gpt-5.1" }, "options": {} }, "credentials": { "openAiApi": { "name": "" } }, "typeVersion": 1.2 }, { "id": "d31d35f6-fc11-473c-9eec-6b150abb38a2", "name": "Structured Output Parser", "type": "@n8n/n8n-nodes-langchain.outputParserStructured", "position": [ 752, 336 ], "parameters": { "jsonSchemaExample": "{\n \"post_content\": \"The main LinkedIn post text goes here with emojis naturally integrated...\",\n \"hashtags\": [\"#Marketing\", \"#Leadership\", \"#AI\"],\n \"character_count\": 285,\n \"engagement_tip\": \"Best time to post: Tuesday-Thursday, 8-10 AM\",\n \"call_to_action\": \"What's your experience with this? Share in the comments!\",\n \"image_prompt\": \"A detailed DALL-E prompt for generating a professional LinkedIn post image\"\n}" }, "typeVersion": 1.3 }, { "id": "079b8cd0-f4fd-43fc-9ba5-546e6640945f", "name": "Post Formatter", "type": "n8n-nodes-base.code", "position": [ 1024, 176 ], "parameters": { "jsCode": "// Parse the AI output\n// If your AI returns an array like in your example, we need to access the first item\nlet aiData;\n\ntry {\n // Check if the input is already an object or needs parsing\n if (typeof $input.all()[0].json.output === 'string') {\n aiData = JSON.parse($input.all()[0].json.output);\n } else {\n // If it's already an object, use it directly\n aiData = $input.all()[0].json.output;\n }\n} catch (error) {\n throw new Error('Failed to parse AI output: ' + error.message);\n}\n\n// Extract the components\nconst postContent = aiData.post_content || '';\nconst hashtags = aiData.hashtags || [];\nconst engagementTip = aiData.engagement_tip || '';\nconst callToAction = aiData.call_to_action || '';\nconst emojiSuggestions = aiData.emoji_suggestions || '';\n\n// Format hashtags as a single string\nconst hashtagString = hashtags.join(' ');\n\n// Create the final formatted post\n// Post content + blank line + hashtags\nconst finalPost = `${postContent}\\n\\n${hashtagString}`;\n\n// Calculate character count\nconst characterCount = finalPost.length;\n\n// Calculate word count (bonus metric)\nconst wordCount = finalPost.trim().split(/\\s+/).length;\n\n// Check if post is within LinkedIn limits\nconst isWithinLimit = characterCount <= 3000;\nconst hasHashtags = hashtags.length >= 3;\n\n// Return formatted output\nreturn {\n // The final post ready to publish\n final_post: finalPost,\n \n // Original components (useful for display/editing)\n post_content: postContent,\n hashtags: hashtags,\n hashtag_string: hashtagString,\n \n // Metadata\n character_count: characterCount,\n word_count: wordCount,\n hashtag_count: hashtags.length,\n \n // Quality checks (for next node)\n is_within_limit: isWithinLimit,\n has_minimum_hashtags: hasHashtags,\n passes_quality_check: isWithinLimit && hasHashtags,\n \n // Additional info from AI\n engagement_tip: engagementTip,\n call_to_action: callToAction,\n emoji_suggestions: emojiSuggestions,\n \n // Timestamp\n generated_at: new Date().toISOString(),\n \n // Warning messages (if any)\n warnings: [\n !isWithinLimit ? `\u26a0\ufe0f Post exceeds 3000 characters (${characterCount} chars)` : null,\n !hasHashtags ? `\u26a0\ufe0f Post has fewer than 3 hashtags (${hashtags.length} found)` : null\n ].filter(Boolean)\n};" }, "typeVersion": 2 }, { "id": "bc13050c-aed5-4456-8bb5-ffce41b73ca5", "name": "AI Content Generation", "type": "@n8n/n8n-nodes-langchain.agent", "position": [ 560, 176 ], "parameters": { "text": "=You are a LinkedIn content expert. Create an engaging LinkedIn post based on these inputs:\n\nTopic: {{ $('Limit to One Post').item.json['Topic/Subject'] }}\nContent Type: {{ $('Limit to One Post').item.json['Content Type'] }}\nTone: {{ $('Limit to One Post').item.json['Tone'] }}\nTarget Audience: {{ $('Limit to One Post').item.json['Target Audience'] }}\nAdditional Notes: {{ $('Limit to One Post').item.json['Additional Notes'] }}\n\nRequirements:\n- Write a compelling LinkedIn post (150\u2013300 words optimal)\n- Use short paragraphs (2\u20133 lines max) for readability\n- Include a strong hook in the first line\n- Add 3\u20135 relevant hashtags\n- Include a clear call-to-action that encourages comments\n- Match the specified tone exactly\n- Format specifically for LinkedIn (line breaks, no markdown)\n- Write in a natural, conversational human voice\n- Avoid corporate jargon, buzzwords, and overly formal language\n- Use contractions (I'm, don't, we're) and casual phrasing where appropriate\n- Vary sentence length; avoid repetitive sentence structures\n- Include light personal perspective or storytelling when relevant\n- Avoid clich\u00e9s such as \"game-changer,\" \"leverage,\" \"synergy,\" \"circle back,\" or \"deep dive\"\n- Do not use the character \"\u2014\" anywhere\n- Write one word image queries separated by commas. \n\nOutput Instructions:\nReturn your response as valid JSON in the following structure only:\n\n{\n \"post_content\": \"The full LinkedIn post text goes here...\",\n \"hashtags\": [\"#Marketing\", \"#Leadership\", \"#AI\"],\n \"character_count\": 285,\n \"engagement_tip\": \"Best time to post: Tuesday\u2013Thursday, 8\u201310 AM\",\n \"call_to_action\": \"What's your experience with this? Share in the comments.\",\n \"image_query\": \"AI, Computer, IT\"\n}\n", "options": {}, "promptType": "define", "hasOutputParser": true }, "typeVersion": 2.1 }, { "id": "585276c1-d063-4e46-ad71-afcbdf492533", "name": "OpenAI Chat Model1", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ -224, 944 ], "parameters": { "model": { "__rl": true, "mode": "list", "value": "gpt-4.1-mini", "cachedResultName": "gpt-4.1-mini" }, "options": {} }, "credentials": { "openAiApi": { "name": "" } }, "typeVersion": 1.2 }, { "id": "608b97ae-afa8-4e89-bbb5-c0a1ad0c50c2", "name": "Format Content to HTML", "type": "@n8n/n8n-nodes-langchain.agent", "position": [ -224, 768 ], "parameters": { "text": "=You are an email formatting expert. Convert the following LinkedIn post into a clean, professional HTML email that works perfectly in Gmail.\n\nLinkedIn Post Content:\n{{ $json.final_post }}\n\nRequirements:\n- Create Gmail-compatible HTML (inline CSS only, no external stylesheets)\n- Use a clean, professional email layout\n- Make it mobile-responsive\n- Include the post content with proper formatting and line breaks\n- Add the hashtags at the bottom in a subtle, styled way\n- Use web-safe fonts (Arial, Helvetica, Georgia, Times New Roman)\n- Keep it simple - Gmail strips many CSS properties\n- Ensure good readability with proper spacing and typography\n- Use a maximum width of 600px for email clients\n- If the post contains a call-to-action, format it as regular text (not a button)\n- NEVER create button elements (