Robert Breen This workflow corresponds to n8n.io template #7025 — we link there as the canonical source.
This workflow follows the Agent → HTTP Request recipe pattern — see all workflows that pair these two integrations.
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 →
{
"nodes": [
{
"id": "2ea0c49a-6706-4272-8990-06f578c5c5a7",
"name": "When clicking \u2018Execute workflow\u2019",
"type": "n8n-nodes-base.manualTrigger",
"position": [
-360,
1080
],
"parameters": {},
"typeVersion": 1
},
{
"id": "a889197b-b78d-4808-948c-6d57883ee34f",
"name": "AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
920,
1060
],
"parameters": {
"text": "=posts: {{ $json.text }}",
"options": {
"systemMessage": "=I'm looking for ideas for posts about {{ $('Create Search Term').item.json.Search_Term }}\n\nHere's the last 5 posts on instagram about the topic. Use those to help me generate a list of relevent captions to post on my instagram. \n\ndo not make up ideas that are not like the others in the list. \n\noutput like this. \n\n{\n\t\"Post Idea\": [\"Idea1\", \"Idea2\"], \n \"Most Common Post\": [\"common post 1\", \"common post 2\"]\n}"
},
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 2
},
{
"id": "47f4b1cb-9361-4aff-a439-2c8979fe93f4",
"name": "OpenAI Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
960,
1280
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "2b0f574d-7976-469a-bf84-00a37ef15def",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
1140,
1280
],
"parameters": {
"jsonSchemaExample": "{\n\t\"Post Idea\": [\"Idea1\", \"Idea2\"], \n \"Most Common Post\": [\"common post 1\", \"common post 2\"]\n}"
},
"typeVersion": 1.2
},
{
"id": "00910de9-80ba-41c9-8200-81fcb6d15f45",
"name": "Find Recent Posts",
"type": "n8n-nodes-base.httpRequest",
"position": [
140,
1120
],
"parameters": {
"url": "=https://api.apify.com/v2/acts/apify~instagram-hashtag-scraper/run-sync-get-dataset-items\n",
"method": "POST",
"options": {},
"jsonBody": "={\n \"hashtags\": [\n \"{{ $json.Search_Term }}\"\n ],\n \"resultsLimit\": 20,\n \"resultsType\": \"posts\"\n}",
"sendBody": true,
"specifyBody": "json",
"authentication": "genericCredentialType",
"genericAuthType": "httpQueryAuth"
},
"credentials": {
"httpQueryAuth": {
"name": "<your credential>"
}
},
"typeVersion": 4.2
},
{
"id": "5a62f897-74a6-4899-a8c9-a51a6d011373",
"name": "Create Search Term",
"type": "n8n-nodes-base.set",
"position": [
-140,
1000
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "ad5c9a23-7fe0-4ed4-b1e7-d3da417bcb86",
"name": "Search_Term",
"type": "string",
"value": "n8n"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "33a01e12-8820-4184-92fb-6682470940b1",
"name": "Set bio and follower count",
"type": "n8n-nodes-base.set",
"position": [
440,
920
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "ac638d8c-fa83-4cf6-92af-e0489d7349dd",
"name": "caption",
"type": "string",
"value": "={{ $json.caption }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "7275daae-bf7a-4c06-928a-16f0bfdc0a3b",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-400,
100
],
"parameters": {
"color": 3,
"width": 780,
"height": 1380,
"content": "### 1\ufe0f\u20e3 Manual Trigger\n\n#### \ud83e\udde9 Node: `When clicking \u2018Execute workflow\u2019`\n- Manually starts the workflow for testing or single-run execution.\n\n---\n\n### 2\ufe0f\u20e3 Define the Hashtag\n\n#### \ud83e\udde9 Node: `Create Search Term`\n- Sets the value of the hashtag you'd like to scan.\n- Default is `n8n`, but you can modify it to anything.\n\n```json\n{\n \"Search_Term\": \"yourCustomHashtag\"\n}\n```\n\n---\n\n### 3\ufe0f\u20e3 Scrape Instagram Posts\n\n#### \ud83e\udde9 Node: `Find Recent Posts`\n- **API**: [Apify Instagram Hashtag Scraper](https://console.apify.com/actors/apify/instagram-hashtag-scraper)\n- **Setup**:\n - Visit [Apify Console](https://console.apify.com/)\n - Create an API token\n - In n8n, go to Credentials and add `HTTP Query Auth`\n - Use `?token=yourTokenHere` as the query string\n\n**JSON Body:**\n```json\n{\n \"hashtags\": [\"{{ $json.Search_Term }}\"],\n \"resultsLimit\": 20,\n \"resultsType\": \"posts\"\n}\n```\n\n---\n\n"
},
"typeVersion": 1
},
{
"id": "09a04fbd-a16b-4166-a623-555770c81605",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
400,
100
],
"parameters": {
"color": 4,
"width": 440,
"height": 1380,
"content": "\n### 4\ufe0f\u20e3 Extract Captions\n\n#### \ud83e\udde9 Node: `Set bio and follower count`\n- Extracts just the `caption` from each post and stores it in a clean variable for the AI agent to use.\n\n---\n\n### 5\ufe0f\u20e3 Aggregate Captions\n\n#### \ud83e\udde9 Node: `Aggregate`\n- Gathers all captions into one list before processing.\n- Useful for passing a large text block into the AI.\n\n---\n\n### 6\ufe0f\u20e3 Convert to Single Text Block\n\n#### \ud83e\udde9 Node: `Convert table names and columns into single text for agent`\n- Uses a `Code` node to combine all captions into a single string for OpenAI to read:\n```javascript\nreturn [\n {\n json: {\n text: items\n .map(item => `- ${JSON.stringify(item.json)}`)\n .join('\\n\\n'),\n },\n },\n];\n```\n\n---"
},
"typeVersion": 1
},
{
"id": "6a88d748-9563-49b8-9398-9d2032413f94",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
860,
100
],
"parameters": {
"color": 6,
"width": 420,
"height": 1380,
"content": "### 7\ufe0f\u20e3 Generate Caption Ideas with AI\n\n#### \ud83e\udde9 Node: `AI Agent`\n- Takes the combined post text and sends it to GPT-4o-mini.\n- Includes this system message:\n```text\nI'm looking for ideas for posts about {{ $('Create Search Term').item.json.Search_Term }}.\nHere\u2019s the last 5 posts on Instagram about the topic. Use those to help me generate a list of relevant captions.\n\nDo not make up ideas that are not like the others in the list.\n\nOutput like this:\n{\n \"Post Idea\": [\"Idea1\", \"Idea2\"],\n \"Most Common Post\": [\"common post 1\", \"common post 2\"]\n}\n```\n\n---\n\n### 8\ufe0f\u20e3 Choose Language Model\n\n#### \ud83e\udde9 Node: `OpenAI Chat Model`\n- **Model**: `gpt-4o-mini`\n- **Credential**: Use your OpenAI API key.\n - Get it from: [OpenAI API Keys](https://platform.openai.com/account/api-keys)\n - Add it in n8n under OpenAI credentials.\n\n---\n\n### 9\ufe0f\u20e3 Parse the AI Output\n\n#### \ud83e\udde9 Node: `Structured Output Parser`\n- Parses the GPT response into structured JSON:\n```json\n{\n \"Post Idea\": [\"Idea1\", \"Idea2\"],\n \"Most Common Post\": [\"common post 1\", \"common post 2\"]\n}\n```\n\n---\n"
},
"typeVersion": 1
},
{
"id": "812c1007-ba56-4934-b88f-fcfe1f0bcf01",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-400,
-80
],
"parameters": {
"width": 2320,
"content": "## \ud83d\udcec Need More Help?\n\n**\ud83d\udc64 Robert Breen** \nAutomation Consultant | AI Workflow Designer | n8n Expert \n\ud83d\udce7 [robert@ynteractive.com](mailto:robert@ynteractive.com) \n\ud83d\udd17 [LinkedIn](https://www.linkedin.com/in/robert-breen-29429625/)\n"
},
"typeVersion": 1
},
{
"id": "5fee94d6-f796-4785-a806-07714c2f0d64",
"name": "Aggregate",
"type": "n8n-nodes-base.aggregate",
"position": [
600,
1100
],
"parameters": {
"options": {},
"fieldsToAggregate": {
"fieldToAggregate": [
{
"fieldToAggregate": "caption"
}
]
}
},
"typeVersion": 1
},
{
"id": "0381aa63-dfa9-4e94-9991-6b266325d8ad",
"name": "Convert table names and columns into single text for agent",
"type": "n8n-nodes-base.code",
"position": [
700,
880
],
"parameters": {
"jsCode": "return [\n {\n json: {\n text: items\n .map(item => `- ${JSON.stringify(item.json)}`)\n .join('\\n\\n'),\n },\n },\n];\n"
},
"typeVersion": 2
},
{
"id": "1d2af5fa-b9ef-401d-8b29-b0376d1317b4",
"name": "Split Out",
"type": "n8n-nodes-base.splitOut",
"position": [
1400,
1020
],
"parameters": {
"options": {},
"fieldToSplitOut": "output['Post Idea']"
},
"typeVersion": 1
},
{
"id": "12b8c5e9-3448-4459-ad9b-d6e1af7a7c84",
"name": "Split Out1",
"type": "n8n-nodes-base.splitOut",
"position": [
1420,
1260
],
"parameters": {
"options": {},
"fieldToSplitOut": "output['Most Common Post']"
},
"typeVersion": 1
},
{
"id": "73fd8217-6eae-4ce5-a2b5-f0325ea9154e",
"name": "Merge",
"type": "n8n-nodes-base.merge",
"position": [
1660,
1140
],
"parameters": {
"mode": "combine",
"options": {},
"combineBy": "combineByPosition"
},
"typeVersion": 3.2
},
{
"id": "a25480f7-c832-4f8c-80e7-5e1ebd486305",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
1300,
100
],
"parameters": {
"width": 620,
"height": 1380,
"content": "### \ud83d\udd1f Split the Outputs\n\n#### \ud83e\udde9 Nodes: `Split Out`, `Split Out1`\n- Separates the `Post Idea` list and `Most Common Post` list into individual items.\n\n---\n\n### \ud83d\udd01 Merge for Final Output\n\n#### \ud83e\udde9 Node: `Merge`\n- Combines the two split lists into one output stream.\n\n---"
},
"typeVersion": 1
}
],
"connections": {
"AI Agent": {
"main": [
[
{
"node": "Split Out",
"type": "main",
"index": 0
},
{
"node": "Split Out1",
"type": "main",
"index": 0
}
]
]
},
"Aggregate": {
"main": [
[
{
"node": "Convert table names and columns into single text for agent",
"type": "main",
"index": 0
}
]
]
},
"Split Out": {
"main": [
[
{
"node": "Merge",
"type": "main",
"index": 0
}
]
]
},
"Split Out1": {
"main": [
[
{
"node": "Merge",
"type": "main",
"index": 1
}
]
]
},
"Find Recent Posts": {
"main": [
[
{
"node": "Set bio and follower count",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Create Search Term": {
"main": [
[
{
"node": "Find Recent Posts",
"type": "main",
"index": 0
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "AI Agent",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"Set bio and follower count": {
"main": [
[
{
"node": "Aggregate",
"type": "main",
"index": 0
}
]
]
},
"When clicking \u2018Execute workflow\u2019": {
"main": [
[
{
"node": "Create Search Term",
"type": "main",
"index": 0
}
]
]
},
"Convert table names and columns into single text for agent": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
}
}
}
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.
httpQueryAuthopenAiApi
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About this workflow
This n8n workflow scrapes recent Instagram posts by hashtag and generates new, relevant caption ideas using OpenAI. It avoids making up suggestions by analyzing real-world content and surfacing common patterns.
Source: https://n8n.io/workflows/7025/ — original creator credit. Request a take-down →
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