Trending Topics to Daily AI Post

The workflow JSON

Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →

{
  "name": "Trending topics to daily AI post",
  "nodes": [
    {
      "parameters": {
        "content": "## Trending topics \u2192 daily AI post\n\nEvery morning: ask Perplexity what's trending in your niche, draft per-platform captions with an LLM, and schedule one post per network through Posta.\n\n> **Drafts only by default.** Posts are created as drafts and scheduled \u2014 review them each morning before they ship. Don't flip to auto-publish until you trust the output.\n\n### Setup\n\n- [ ] Header Auth creds: `Posta API`, `OpenAI API`, `Perplexity API`\n- [ ] `CONTENT_NICHE` env, e.g. `developer tools` \u2014 what to search trends for\n- [ ] In **Fan out to platforms**, set your LinkedIn / Bluesky / Threads Posta account ids and the per-platform peak hours\n\n### Optional: AI image\n\nAdd an image step (DALL\u00b7E / Runware / fal.ai) \u2192 download the bytes \u2192 Posta **Upload media** (resource: Media) \u2192 pass the returned id via Create post's **Additional Fields \u2192 Media IDs**, and per-network crops happen inside Posta.",
        "height": 560,
        "width": 460
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        -1180,
        -120
      ],
      "id": "d1000000-0000-4000-9000-000000000001",
      "name": "Sticky Overview"
    },
    {
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "days",
              "triggerAtHour": 8
            }
          ]
        }
      },
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1.2,
      "position": [
        -640,
        160
      ],
      "id": "d1000000-0000-4000-9000-000000000002",
      "name": "Every day at 8am"
    },
    {
      "parameters": {
        "method": "POST",
        "url": "https://api.perplexity.ai/chat/completions",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({\n  model: 'sonar',\n  messages: [\n    { role: 'user', content: \"What's trending today in \" + ($env.CONTENT_NICHE || 'social media automation') + \"? Give 3 distinct, specific angles worth posting about. Be concise.\" }\n  ]\n}) }}",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        -400,
        160
      ],
      "id": "d1000000-0000-4000-9000-000000000003",
      "name": "Trending angles (Perplexity)",
      "credentials": {
        "httpHeaderAuth": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "method": "POST",
        "url": "https://api.openai.com/v1/chat/completions",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({\n  model: 'gpt-4o-mini',\n  response_format: { type: 'json_object' },\n  messages: [\n    { role: 'system', content: 'Pick the single best angle from the input and write per-platform captions. Return JSON {\"linkedin\": long-form professional, \"bluesky\": <=300 chars, \"threads\": punchy}. No hashtags on LinkedIn.' },\n    { role: 'user', content: $json.choices[0].message.content }\n  ]\n}) }}",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        -160,
        160
      ],
      "id": "d1000000-0000-4000-9000-000000000004",
      "name": "Per-platform captions",
      "credentials": {
        "httpHeaderAuth": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "jsCode": "// Parse the captions JSON and fan out to one item per platform with the\n// account id and that network's peak posting hour (today).\nconst c = JSON.parse($input.first().json.choices[0].message.content);\n\n// >>> Set your Posta social account ids and peak hours here <<<\nconst ACCOUNTS = { linkedin: 'REPLACE_LINKEDIN_ID', bluesky: 'REPLACE_BLUESKY_ID', threads: 'REPLACE_THREADS_ID' };\nconst HOURS = { linkedin: 9, bluesky: 12, threads: 18 };\n\nreturn ['linkedin', 'bluesky', 'threads'].map((p) => ({\n  json: {\n    platform: p,\n    socialAccountIds: ACCOUNTS[p],\n    caption: c[p],\n    scheduledAt: $now.set({ hour: HOURS[p], minute: 0, second: 0, millisecond: 0 }).toISO(),\n  },\n}));"
      },
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        80,
        160
      ],
      "id": "d1000000-0000-4000-9000-000000000005",
      "name": "Fan out to platforms"
    },
    {
      "parameters": {
        "socialAccountIds": "={{ $json.socialAccountIds }}",
        "caption": "={{ $json.caption }}",
        "additionalFields": {},
        "platformConfigurations": {}
      },
      "type": "n8n-nodes-posta.posta",
      "typeVersion": 1,
      "position": [
        320,
        160
      ],
      "id": "d1000000-0000-4000-9000-000000000006",
      "name": "Create a post",
      "credentials": {
        "postaApi": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "operation": "schedule",
        "postId": "={{ $json.id }}",
        "scheduledAt": "={{ $('Fan out to platforms').item.json.scheduledAt }}"
      },
      "type": "n8n-nodes-posta.posta",
      "typeVersion": 1,
      "position": [
        560,
        160
      ],
      "id": "d1000000-0000-4000-9000-000000000007",
      "name": "Schedule a post",
      "credentials": {
        "postaApi": {
          "name": "<your credential>"
        }
      }
    }
  ],
  "connections": {
    "Every day at 8am": {
      "main": [
        [
          {
            "node": "Trending angles (Perplexity)",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Trending angles (Perplexity)": {
      "main": [
        [
          {
            "node": "Per-platform captions",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Per-platform captions": {
      "main": [
        [
          {
            "node": "Fan out to platforms",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Fan out to platforms": {
      "main": [
        [
          {
            "node": "Create a post",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Create a post": {
      "main": [
        [
          {
            "node": "Schedule a post",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": false,
  "settings": {
    "executionOrder": "v1"
  },
  "meta": {
    "templateCredsSetupCompleted": true
  },
  "tags": [
    {
      "name": "socialmedia"
    },
    {
      "name": "posta"
    },
    {
      "name": "ai"
    }
  ]
}

Credentials you'll need

Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.

• httpHeaderAuth
• postaApi

About this workflow

Trending topics to daily AI post. Uses httpRequest, n8n-nodes-posta. Scheduled trigger; 7 nodes.

Source: https://github.com/STGime/posta-n8n-workflows/blob/main/workflows/trending-topics-daily-ai-post.json — original creator credit. Request a take-down →

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