AI-Generated Social Media Posts with n8n Automation

Why This Automation Matters

Social media managers spend countless hours creating, adapting, and scheduling content across multiple platforms. This workflow eliminates the repetitive task of content creation by leveraging AI to generate platform-specific posts, automatically adapting tone and format for each channel. The automation can create weeks of content in minutes, maintain consistent posting schedules, and ensure your brand voice remains cohesive across all platforms.

What You Need Before Starting

n8n instance (self-hosted or cloud)
OpenAI API key for content generation
Social media platform credentials (Twitter, LinkedIn, Facebook, Instagram)
Google Sheets or Airtable account for content management
Basic understanding of API authentication
Content guidelines document for your brand voice

Complete Node-by-Node Build Instructions

Node 1: Schedule Trigger

Add a Schedule Trigger node
Set interval to “Custom”
Configure cron expression: 0 9 * * 1,3,5 (Monday, Wednesday, Friday at 9 AM)
Set timezone to your preferred zone

Node 2: Google Sheets (Get Content Topics)

Add Google Sheets node
Connect your Google account
Set operation to “Read”
Select your content planning spreadsheet
Choose the sheet containing topic ideas
Set range: “A2:D10” (adjust based on your structure)

Node 3: OpenAI (Generate Content)

Add OpenAI node
Connect your OpenAI API key
Set resource to “Text”
Operation: “Complete”
Model: “gpt-4”
Configure prompt:

Create 4 social media posts for the topic: "{{ $json.topic }}"

Requirements:
- Twitter: 280 chars, engaging, with hashtags
- LinkedIn: Professional tone, 1-2 paragraphs
- Facebook: Conversational, community-focused
- Instagram: Visual-focused with emoji

Brand voice: {{ $json.brand_voice }}
Target audience: {{ $json.audience }}

Format as JSON with keys: twitter, linkedin, facebook, instagram

Set max tokens: 1000
Temperature: 0.7

Node 4: Function (Parse AI Response)

Add Function node
Insert JavaScript code:

const aiResponse = items[0].json.choices[0].text;
const parsedContent = JSON.parse(aiResponse);

return [{
  json: {
    topic: items[0].json.topic,
    posts: parsedContent,
    generated_at: new Date().toISOString()
  }
}];

Node 5: Google Sheets (Save Generated Content)

Add Google Sheets node
Set operation to “Append”
Select your content calendar sheet
Map fields:
- Date: {{ new Date().toISOString().split('T')[0] }}
- Topic: {{ $json.topic }}
- Twitter: {{ $json.posts.twitter }}
- LinkedIn: {{ $json.posts.linkedin }}
- Facebook: {{ $json.posts.facebook }}
- Instagram: {{ $json.posts.instagram }}

Node 6: Switch (Platform Router)

Add Switch node
Mode: “Rules”
Create 4 routes:
- Route 1: Platform equals “twitter”
- Route 2: Platform equals “linkedin”
- Route 3: Platform equals “facebook”
- Route 4: Platform equals “instagram”

Node 7a: Twitter API (Post Tweet)

Add Twitter node
Authenticate with Twitter API v2
Operation: “Create a Tweet”
Text: {{ $json.posts.twitter }}
Add media IDs if images are available

Node 7b: LinkedIn API (Create Post)

Add LinkedIn node
Connect LinkedIn credentials
Operation: “Create a Post”
Text: {{ $json.posts.linkedin }}
Set visibility to “PUBLIC”

Node 7c: Facebook API (Create Post)

Add Facebook Graph API node
Authenticate with Facebook
Operation: “POST”
Resource: “/me/feed”
Message: {{ $json.posts.facebook }}

Node 7d: Instagram API (Create Media)

Add Instagram node
Connect Instagram Business account
Operation: “Create Media”
Caption: {{ $json.posts.instagram }}
Media type: “IMAGE” or “VIDEO”

Node 8: Merge (Combine Results)

Add Merge node
Mode: “Combine All”
Connect all platform posting nodes

Node 9: Slack Notification (Optional)

Add Slack node
Connect Slack workspace
Operation: “Send Message”
Channel: “#social-media”
Message:

✅ AI Content Posted Successfully!
Topic: {{ $json.topic }}
Platforms: Twitter, LinkedIn, Facebook, Instagram
Generated at: {{ $json.generated_at }}

Full Workflow JSON Code

{
  "name": "AI Social Media Content Generator",
  "nodes": [
    {
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "cronExpression",
              "expression": "0 9 * * 1,3,5"
            }
          ]
        }
      },
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1,
      "position": [
        240,
        300
      ]
    },
    {
      "parameters": {
        "authentication": "oAuth2",
        "operation": "read",
        "documentId": "your-spreadsheet-id",
        "sheetName": "Topics",
        "range": "A2:D10"
      },
      "name": "Get Content Topics",
      "type": "n8n-nodes-base.googleSheets",
      "typeVersion": 3,
      "position": [
        460,
        300
      ]
    },
    {
      "parameters": {
        "resource": "text",
        "operation": "complete",
        "model": "gpt-4",
        "prompt": "Create 4 social media posts for the topic: \"{{ $json.topic }}\"\n\nRequirements:\n- Twitter: 280 chars, engaging, with hashtags\n- LinkedIn: Professional tone, 1-2 paragraphs\n- Facebook: Conversational, community-focused\n- Instagram: Visual-focused with emoji\n\nBrand voice: {{ $json.brand_voice }}\nTarget audience: {{ $json.audience }}\n\nFormat as JSON with keys: twitter, linkedin, facebook, instagram",
        "maxTokens": 1000,
        "temperature": 0.7
      },
      "name": "Generate AI Content",
      "type": "n8n-nodes-base.openAi",
      "typeVersion": 1,
      "position": [
        680,
        300
      ]
    },
    {
      "parameters": {
        "functionCode": "const aiResponse = items[0].json.choices[0].text;\nconst parsedContent = JSON.parse(aiResponse);\n\nreturn [{\n  json: {\n    topic: items[0].json.topic,\n    posts: parsedContent,\n    generated_at: new Date().toISOString()\n  }\n}];"
      },
      "name": "Parse AI Response",
      "type": "n8n-nodes-base.function",
      "typeVersion": 1,
      "position": [
        900,
        300
      ]
    },
    {
      "parameters": {
        "authentication": "oAuth2",
        "operation": "append",
        "documentId": "your-content-calendar-id",
        "sheetName": "Generated Content",
        "columns": {
          "mappingMode": "defineBelow",
          "value": {
            "Date": "{{ new Date().toISOString().split('T')[0] }}",
            "Topic": "{{ $json.topic }}",
            "Twitter": "{{ $json.posts.twitter }}",
            "LinkedIn": "{{ $json.posts.linkedin }}",
            "Facebook": "{{ $json.posts.facebook }}",
            "Instagram": "{{ $json.posts.instagram }}"
          }
        }
      },
      "name": "Save to Content Calendar",
      "type": "n8n-nodes-base.googleSheets",
      "typeVersion": 3,
      "position": [
        1120,
        300
      ]
    },
    {
      "parameters": {
        "mode": "rules",
        "rules": {
          "values": [
            {
              "conditions": {
                "all": [
                  {
                    "value1": "twitter",
                    "value2": "twitter"
                  }
                ]
              }
            },
            {
              "conditions": {
                "all": [
                  {
                    "value1": "linkedin",
                    "value2": "linkedin"
                  }
                ]
              }
            },
            {
              "conditions": {
                "all": [
                  {
                    "value1": "facebook",
                    "value2": "facebook"
                  }
                ]
              }
            },
            {
              "conditions": {
                "all": [
                  {
                    "value1": "instagram",
                    "value2": "instagram"
                  }
                ]
              }
            }
          ]
        }
      },
      "name": "Platform Router",
      "type": "n8n-nodes-base.switch",
      "typeVersion": 1,
      "position": [
        1340,
        300
      ]
    },
    {
      "parameters": {
        "operation": "tweet",
        "text": "{{ $json.posts.twitter }}"
      },
      "name": "Post to Twitter",
      "type": "n8n-nodes-base.twitter",
      "typeVersion": 1,
      "position": [
        1560,
        200
      ]
    },
    {
      "parameters": {
        "operation": "create",
        "postAs": "person",
        "text": "{{ $json.posts.linkedin }}"
      },
      "name": "Post to LinkedIn",
      "type": "n8n-nodes-base.linkedIn",
      "typeVersion": 1,
      "position": [
        1560,
        300
      ]
    },
    {
      "parameters": {
        "operation": "create",
        "message": "{{ $json.posts.facebook }}"
      },
      "name": "Post to Facebook",
      "type": "n8n-nodes-base.facebookGraphApi",
      "typeVersion": 1,
      "position": [
        1560,
        400
      ]
    },
    {
      "parameters": {
        "operation": "uploadImage",
        "caption": "{{ $json.posts.instagram }}"
      },
      "name": "Post to Instagram",
      "type": "n8n-nodes-base.instagram",
      "typeVersion": 1,
      "position": [
        1560,
        500
      ]
    },
    {
      "parameters": {
        "mode": "combine",
        "combinationMode": "combineAll"
      },
      "name": "Merge Platform Results",
      "type": "n8n-nodes-base.merge",
      "typeVersion": 2,
      "position": [
        1780,
        350
      ]
    },
    {
      "parameters": {
        "channel": "#social-media",
        "text": "✅ AI Content Posted Successfully!\nTopic: {{ $json.topic }}\nPlatforms: Twitter, LinkedIn, Facebook, Instagram\nGenerated at: {{ $json.generated_at }}"
      },
      "name": "Slack Notification",
      "type": "n8n-nodes-base.slack",
      "typeVersion": 1,
      "position": [
        2000,
        350
      ]
    }
  ],
  "connections": {
    "Schedule Trigger": {
      "main": [
        [
          {
            "node": "Get Content Topics",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get Content Topics": {
      "main": [
        [
          {
            "node": "Generate AI Content",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Generate AI Content": {
      "main": [
        [
          {
            "node": "Parse AI Response",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Parse AI Response": {
      "main": [
        [
          {
            "node": "Save to Content Calendar",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Save to Content Calendar": {
      "main": [
        [
          {
            "node": "Platform Router",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Platform Router": {
      "main": [
        [
          {
            "node": "Post to Twitter",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Post to LinkedIn",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Post to Facebook",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Post to Instagram",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Post to Twitter": {
      "main": [
        [
          {
            "node": "Merge Platform Results",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Post to LinkedIn": {
      "main": [
        [
          {
            "node": "Merge Platform Results",
            "type": "main",
            "index": 1
          }
        ]
      ]
    },
    "Post to Facebook": {
      "main": [
        [
          {
            "node": "Merge Platform Results",
            "type": "main",
            "index": 2
          }
        ]
      ]
    },
    "Post to Instagram": {
      "main": [
        [
          {
            "node": "Merge Platform Results",
            "type": "main",
            "index": 3
          }
        ]
      ]
    },
    "Merge Platform Results": {
      "main": [
        [
          {
            "node": "Slack Notification",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

FAQ

How can I customize the AI-generated content for my brand voice?

Modify the OpenAI prompt to include specific brand guidelines, tone preferences, and style requirements. You can also add a separate