NotionとGPT-4を使ったSNS自動投稿ツール(Instagram自動投稿+Threads/X/ブログ原稿)
上級
これはMiscellaneous, Multimodal AI分野の自動化ワークフローで、17個のノードを含みます。主にNotion, Webhook, HttpRequest, OpenAiなどのノードを使用。 GPT-4、Notion、Instagram APIを使ってソーシャルメディアのコンテンツを自動生成して投稿する
前提条件
- •Notion API Key
- •HTTP Webhookエンドポイント(n8nが自動生成)
- •ターゲットAPIの認証情報が必要な場合あり
- •OpenAI API Key
使用ノード (17)
ワークフロープレビュー
ノード接続関係を可視化、ズームとパンをサポート
ワークフローをエクスポート
以下のJSON設定をn8nにインポートして、このワークフローを使用できます
{
"id": "A90U504fcvjJqgF5",
"meta": {
"instanceId": "ad59d09d8e026d0e92690243618d86d51b0293b236148394ca356eae1d1ea59b"
},
"name": "SNS Auto-Poster with Notion & GPT-4 (Instagram Auto + Threads/X/Blog Drafts)",
"tags": [],
"nodes": [
{
"id": "feef23dc-de7b-426f-9e86-26e3ba755c16",
"name": "ステップ1: 入力",
"type": "n8n-nodes-base.stickyNote",
"position": [
-368,
-64
],
"parameters": {
"width": 464,
"height": 448,
"content": "# Step 1: Input\n\n- Receive raw text via Webhook (e.g., LINE Bot)\n- Save input automatically into Notion database"
},
"typeVersion": 1
},
{
"id": "a58fb4c9-73e7-486b-aaa4-8bb537c63117",
"name": "ステップ2: キャプション生成",
"type": "n8n-nodes-base.stickyNote",
"position": [
144,
-64
],
"parameters": {
"color": 3,
"width": 2224,
"height": 448,
"content": "# Step 2: Generate Captions\n\n- Use GPT-4o to create captions for multiple platforms\n- Instagram (for auto-post), Threads, X/Twitter, Blog (draft only)\n- Save all drafts back into Notion for tracking and reuse"
},
"typeVersion": 1
},
{
"id": "60353fc8-ea55-46a6-af74-744ff9bc99cf",
"name": "ステップ3: 画像処理",
"type": "n8n-nodes-base.stickyNote",
"position": [
2416,
-64
],
"parameters": {
"color": 4,
"width": 416,
"height": 448,
"content": "# Step 3: Image Handling\n\n- Fetch book cover image from external APIs (Google Books, OpenBD, OpenLibrary)\n- Upload selected image to Cloudinary\n- Generate final optimized URL for Instagram posting"
},
"typeVersion": 1
},
{
"id": "d6e2fe83-ee28-4917-962b-7d3eff5e3be7",
"name": "ステップ4: Instagram投稿",
"type": "n8n-nodes-base.stickyNote",
"position": [
2864,
-64
],
"parameters": {
"color": 6,
"width": 384,
"height": 448,
"content": "# Step 4: Instagram Publish\n\n- Create a media container via Instagram Graph API\n- Publish automatically with the generated caption + image\n- Verify post status before final publishing"
},
"typeVersion": 1
},
{
"id": "77eac861-c22d-46b9-b321-91f275c7e2a9",
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"notes": "Receive text input (from LINE or other source).",
"position": [
-288,
160
],
"webhookId": "d00a0c29-6e20-47f7-b57a-c60ed357c486",
"parameters": {
"path": "line-book-output",
"options": {},
"httpMethod": "POST",
"responseMode": "=onReceived"
},
"typeVersion": 2
},
{
"id": "d9caab24-f532-455a-b19d-d9cff6dc1fe1",
"name": "Notionページ作成",
"type": "n8n-nodes-base.notion",
"notes": "Create a new Notion page with input text.",
"position": [
-64,
160
],
"parameters": {
"options": {},
"resource": "databasePage",
"databaseId": "<your_database_id>",
"propertiesUi": {
"propertyValues": [
{
"key": "Title|title",
"textContent": "={{ $json.body.events[0].message.text }}"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "bf244b57-2dcf-4232-9460-e77c882d5982",
"name": "Instagramキャプション生成",
"type": "@n8n/n8n-nodes-langchain.openAi",
"notes": "Generate Instagram caption using GPT-4.",
"position": [
160,
160
],
"parameters": {
"modelId": {
"mode": "list",
"value": "chatgpt-4o-latest"
},
"options": {},
"messages": {
"values": [
{
"content": "=Summarize for Instagram (<=1000 chars, include hashtags):\n{{ $json.name }}"
}
]
}
},
"typeVersion": 1.8
},
{
"id": "f10bfbfa-031b-4299-b4d4-f91707ced60c",
"name": "Instagramキャプション保存",
"type": "n8n-nodes-base.notion",
"position": [
512,
160
],
"parameters": {
"pageId": {
"mode": "url",
"value": "={{ $('Notion Page Create').item.json.url }}"
},
"options": {},
"resource": "databasePage",
"operation": "update",
"propertiesUi": {
"propertyValues": [
{
"key": "Instagram Caption|rich_text",
"textContent": "={{ $json.message.content }}"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "2f1034e6-61fc-4c78-adfd-dd4d02b8dbe5",
"name": "Threadsキャプション生成",
"type": "@n8n/n8n-nodes-langchain.openAi",
"position": [
736,
160
],
"parameters": {
"modelId": {
"mode": "list",
"value": "chatgpt-4o-latest"
},
"options": {},
"messages": {
"values": [
{
"content": "=Summarize for Threads (<=500 chars, include hashtags):\n{{ $json.name }}"
}
]
}
},
"typeVersion": 1.8
},
{
"id": "7d9b7435-1580-40fb-8b4d-e3e9fa1364fe",
"name": "Threadsキャプション保存",
"type": "n8n-nodes-base.notion",
"position": [
1088,
160
],
"parameters": {
"pageId": {
"mode": "url",
"value": "={{ $('Notion Page Create').item.json.url }}"
},
"options": {},
"resource": "databasePage",
"operation": "update",
"propertiesUi": {
"propertyValues": [
{
"key": "Threads Caption|rich_text",
"textContent": "={{ $json.message.content }}"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "e71cc3dd-4c56-46f5-b590-8a6bab4c33b7",
"name": "Xキャプション生成",
"type": "@n8n/n8n-nodes-langchain.openAi",
"position": [
1312,
160
],
"parameters": {
"modelId": {
"mode": "list",
"value": "chatgpt-4o-latest"
},
"options": {},
"messages": {
"values": [
{
"content": "=Summarize for X/Twitter (<=280 chars, include hashtags):\n{{ $json.name }}"
}
]
}
},
"typeVersion": 1.8
},
{
"id": "d9ed8fd0-cfa5-4e3f-84b8-b4c45d5ada00",
"name": "Xキャプション保存",
"type": "n8n-nodes-base.notion",
"position": [
1664,
160
],
"parameters": {
"pageId": {
"mode": "url",
"value": "={{ $('Notion Page Create').item.json.url }}"
},
"options": {},
"resource": "databasePage",
"operation": "update",
"propertiesUi": {
"propertyValues": [
{
"key": "X Caption|rich_text",
"textContent": "={{ $json.message.content }}"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "bb04cea6-8bfe-4167-a688-74f0b56bdef8",
"name": "ブログ下書き生成",
"type": "@n8n/n8n-nodes-langchain.openAi",
"position": [
1888,
160
],
"parameters": {
"modelId": {
"mode": "list",
"value": "chatgpt-4o-latest"
},
"options": {},
"messages": {
"values": [
{
"content": "=Rewrite into blog article (<=1800 chars, include Title, TOC, Body):\n{{ $json.name }}"
}
]
}
},
"typeVersion": 1.8
},
{
"id": "ba0f53a5-ac72-4fc6-925e-8bee44e32b32",
"name": "ブログ下書き保存",
"type": "n8n-nodes-base.notion",
"position": [
2240,
160
],
"parameters": {
"pageId": {
"mode": "url",
"value": "={{ $('Notion Page Create').item.json.url }}"
},
"options": {},
"resource": "databasePage",
"operation": "update",
"propertiesUi": {
"propertyValues": [
{
"key": "Blog Draft|rich_text",
"textContent": "={{ $json.message.content }}"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "813fdc45-f135-4f91-a35a-7711f86de3f4",
"name": "Cloudinaryアップロード",
"type": "n8n-nodes-base.httpRequest",
"position": [
2464,
160
],
"parameters": {
"url": "https://api.cloudinary.com/v1_1/<your_cloud_name>/image/upload",
"method": "POST",
"options": {},
"sendBody": true,
"contentType": "multipart-form-data",
"bodyParameters": {
"parameters": [
{
"name": "file",
"parameterType": "formBinaryData",
"inputDataFieldName": "data1"
},
{
"name": "folder",
"value": "ig/books"
},
{
"name": "public_id",
"value": "=ig_books_{{ $json.isbn13 || Date.now() }}_cover"
},
{
"name": "upload_preset",
"value": "<your_upload_preset>"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "74721ffb-a236-4fdf-b4c0-23745f357c65",
"name": "Instagramメディアコンテナ",
"type": "n8n-nodes-base.httpRequest",
"position": [
2688,
160
],
"parameters": {
"url": "https://graph.facebook.com/v23.0/17841458946648987/media",
"method": "POST",
"options": {},
"sendQuery": true,
"queryParameters": {
"parameters": [
{
"name": "access_token",
"value": "={{$env.IG_ACCESS_TOKEN}}"
},
{
"name": "image_url",
"value": "={{$('Upload to Cloudinary').item.json.secure_url}}"
},
{
"name": "caption",
"value": "={{ $('Instagram Caption Save').item.json[\"Instagram Caption|rich_text\"][0].plain_text }}"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "9e25da48-1164-4b10-94c7-2108cdbd67ff",
"name": "Instagram投稿",
"type": "n8n-nodes-base.httpRequest",
"position": [
2992,
160
],
"parameters": {
"url": "https://graph.facebook.com/v23.0/17841458946648987/media_publish",
"method": "POST",
"options": {},
"sendQuery": true,
"queryParameters": {
"parameters": [
{
"name": "creation_id",
"value": "={{ $('Instagram Media Container').item.json.id }}"
},
{
"name": "access_token",
"value": "={{$env.IG_ACCESS_TOKEN}}"
}
]
}
},
"typeVersion": 4.2
}
],
"active": false,
"pinData": {},
"settings": {
"executionOrder": "v1"
},
"versionId": "840dc1ba-d065-490f-85da-563e46ebe80d",
"connections": {
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"index": 0
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},
"d9ed8fd0-cfa5-4e3f-84b8-b4c45d5ada00": {
"main": [
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{
"node": "bb04cea6-8bfe-4167-a688-74f0b56bdef8",
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"ba0f53a5-ac72-4fc6-925e-8bee44e32b32": {
"main": [
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"d9caab24-f532-455a-b19d-d9cff6dc1fe1": {
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"e71cc3dd-4c56-46f5-b590-8a6bab4c33b7": {
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"7d9b7435-1580-40fb-8b4d-e3e9fa1364fe": {
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},
"f10bfbfa-031b-4299-b4d4-f91707ced60c": {
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},
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}
}よくある質問
このワークフローの使い方は?
上記のJSON設定コードをコピーし、n8nインスタンスで新しいワークフローを作成して「JSONからインポート」を選択、設定を貼り付けて認証情報を必要に応じて変更してください。
このワークフローはどんな場面に適していますか?
上級 - その他, マルチモーダルAI
有料ですか?
このワークフローは完全無料です。ただし、ワークフローで使用するサードパーティサービス(OpenAI APIなど)は別途料金が発生する場合があります。
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