Hi everyone,
I’m building an auto-posting workflow for Instagram using Google Drive and the Facebook Graph API in n8n, but I’ve run into an error I can’t solve.
My current setup:
- Google Drive node retrieves the image file (URL + metadata).
- Facebook (Create Container) node tries to post the image to Instagram using
image_urland a caption.
Error I get:
Bad request - please check your parameters
Only photo or video can be accepted as media type.
It seems the Facebook node isn’t recognizing my Google Drive link as a valid media file.
What I’d like to know:
- How can I adjust the Facebook node so the container can download the image properly?
- Should I change my Google Drive link to a direct image file?
- Or is it better to skip the URL entirely and upload the image as a binary file from n8n?
If you have a better approach for setting up an Instagram auto-posting workflow, I’d really appreciate any suggestions or examples.
Thanks in advance!
{
"name": "My workflow 4",
"nodes": [
{
"parameters": {
"content": "https://www.youtube.com/watch?v=n0KDfcvZzOk"
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
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"name": "Sticky Note"
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{
"parameters": {
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{
"mode": "everyMinute"
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},
"triggerOn": "specificFolder",
"folderToWatch": {
"__rl": true,
"value": "=https://drive.google.com/drive/u/0/folders/1eHPpmR5lsCVP6EvPP-bjneb-gHepFNJ2",
"mode": "url"
},
"event": "fileCreated",
"options": {}
},
"type": "n8n-nodes-base.googleDriveTrigger",
"typeVersion": 1,
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0,
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],
"id": "1f6507f9-0944-472d-a1e3-9497226ccbbf",
"name": "Google Drive Trigger",
"credentials": {
"googleDriveOAuth2Api": {
"id": "MiydOD1qFDQCYNvU",
"name": "Google Drive account"
}
}
},
{
"parameters": {
"operation": "download",
"fileId": {
"__rl": true,
"value": "={{ $json.id }}",
"mode": "id"
},
"options": {}
},
"type": "n8n-nodes-base.googleDrive",
"typeVersion": 3,
"position": [
208,
0
],
"id": "8906b92b-f4a5-4815-925c-132be288558a",
"name": "Download file",
"credentials": {
"googleDriveOAuth2Api": {
"id": "MiydOD1qFDQCYNvU",
"name": "Google Drive account"
}
}
},
{
"parameters": {
"resource": "image",
"operation": "analyze",
"modelId": {
"__rl": true,
"value": "gpt-4o-mini",
"mode": "list",
"cachedResultName": "GPT-4O-MINI"
},
"text": "=You are skilled at closely analyzing a single image and crafting a detailed caption based on what you see. Describe the main subject, colors, mood, and any interesting details that stand out. Write a clear, engaging caption that helps viewers understand and appreciate the image without using technical or \"artsy\" language. Make it relatable and suitable for an Instagram audience, encouraging people to connect with the image and respond in the comments. The caption should be vivid, straightforward, and stand on its own as a description of the image, capturing its essence in a way that feels authentic and inviting. Do not use emojis. Do not add hashtags. Do not add quotes. Use fewer adjectives.\n\nSCENARIO: I operate an online store specializing in premium iPhone accessories, including iPhone cases, trendy puffer cases, and stylish crossbody cord straps. My target audience consists of teenagers, students, streetwear enthusiasts, and fashion-forward individuals who value lifestyle aesthetics and functionality in their iPhone accessories.\nMy mission is to create high-quality, engaging, and SEO-optimized blog content that combines: The latest trends in iPhone cases and accessories ,Streetwear and modern fashion influences and Practical style tips for everyday use\n",
"inputType": "base64",
"options": {}
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"type": "@n8n/n8n-nodes-langchain.openAi",
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"position": [
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"id": "b7a9f934-d35e-4122-be5c-dd60ab44a128",
"name": "Analyze image",
"credentials": {
"openAiApi": {
"id": "ORaQ1sh0xMb69Osb",
"name": "OpenAI Demo"
}
}
},
{
"parameters": {
"operation": "appendOrUpdate",
"documentId": {
"__rl": true,
"value": "1TlFz9iAwWaN_XZ0dC2V1Bnh2AegeEjl3sxkWcAsi6PA",
"mode": "list",
"cachedResultName": "Instagram Image Post",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1TlFz9iAwWaN_XZ0dC2V1Bnh2AegeEjl3sxkWcAsi6PA/edit?usp=drivesdk"
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"sheetName": {
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"mode": "list",
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"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1TlFz9iAwWaN_XZ0dC2V1Bnh2AegeEjl3sxkWcAsi6PA/edit#gid=0"
},
"columns": {
"mappingMode": "defineBelow",
"value": {
"Caption": "={{ $json.content }}",
"Name": "={{ $('Download file').item.json.name }}",
"URL": "={{ $('Google Drive Trigger').item.json.webContentLink }}"
},
"matchingColumns": [
"URL"
],
"schema": [
{
"id": "Name",
"displayName": "Name",
"required": false,
"defaultMatch": false,
"display": true,
"type": "string",
"canBeUsedToMatch": true
},
{
"id": "Caption",
"displayName": "Caption",
"required": false,
"defaultMatch": false,
"display": true,
"type": "string",
"canBeUsedToMatch": true
},
{
"id": "URL",
"displayName": "URL",
"required": false,
"defaultMatch": false,
"display": true,
"type": "string",
"canBeUsedToMatch": true,
"removed": false
}
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {}
},
"type": "n8n-nodes-base.googleSheets",
"typeVersion": 4.6,
"position": [
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],
"id": "2fc66d53-2f68-49df-b92e-f4b7d947fc18",
"name": "Append or update row in sheet",
"credentials": {
"googleSheetsOAuth2Api": {
"id": "cvKto9Qe3xYUFrMC",
"name": "Google Sheets account"
}
}
},
{
"parameters": {
"httpRequestMethod": "POST",
"graphApiVersion": "v22.0",
"node": "17841471742042867",
"edge": "media",
"options": {
"queryParameters": {
"parameter": [
{
"name": "image_url",
"value": "={{ $json.URL }}"
},
{
"name": "caption",
"value": "={{ $('Analyze image').item.json.content }}\n\n#AI #Automation #AIAGENT"
}
]
}
}
},
"type": "n8n-nodes-base.facebookGraphApi",
"typeVersion": 1,
"position": [
832,
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],
"id": "f3959d36-1350-4660-8fee-a99633fe6edd",
"name": "Create container",
"credentials": {
"facebookGraphApi": {
"id": "glENg8IuSrPMh1Bz",
"name": "Facebook Graph account"
}
}
},
{
"parameters": {
"graphApiVersion": "v22.0",
"node": "17841471742042867",
"edge": "media_publish",
"options": {
"queryParameters": {
"parameter": [
{
"name": "creation_id"
}
]
}
}
},
"type": "n8n-nodes-base.facebookGraphApi",
"typeVersion": 1,
"position": [
1040,
0
],
"id": "c8e6cb0c-ddd4-4296-8799-6949c8fe46ce",
"name": "Post to Instagram",
"credentials": {
"facebookGraphApi": {
"id": "bwmrdffi1havEi38",
"name": "Facebook Graph account"
}
}
}
],
"pinData": {},
"connections": {
"Google Drive Trigger": {
"main": [
[
{
"node": "Download file",
"type": "main",
"index": 0
}
]
]
},
"Download file": {
"main": [
[
{
"node": "Analyze image",
"type": "main",
"index": 0
}
]
]
},
"Analyze image": {
"main": [
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{
"node": "Append or update row in sheet",
"type": "main",
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}
]
]
},
"Append or update row in sheet": {
"main": [
[
{
"node": "Create container",
"type": "main",
"index": 0
}
]
]
},
"Create container": {
"main": [
[
{
"node": "Post to Instagram",
"type": "main",
"index": 0
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "e6d74fba-0f45-427f-be05-54317f45e702",
"meta": {
"templateCredsSetupCompleted": true,
"instanceId": "755dc82564fe21ead0c19ed80455b95b52d6de9153bfd26c4c850d1ebd524c4e"
},
"id": "gro0CuxLU3I84UNd",
"tags": []
}```
