Tran Trung Nghia This workflow corresponds to n8n.io template #8375 — we link there as the canonical source.
This workflow follows the Form Trigger → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
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{
"nodes": [
{
"id": "c77e4131-abb7-4f10-bac4-809dc2467d42",
"name": "Form \u2014 Get Prompt",
"type": "n8n-nodes-base.formTrigger",
"position": [
560,
1136
],
"parameters": {
"options": {},
"formTitle": "Banana API \u2014 Image Generator",
"formFields": {
"values": [
{
"fieldLabel": "api_token",
"placeholder": "Bearer YOUR_TOKEN_HERE",
"requiredField": true
},
{
"fieldType": "textarea",
"fieldLabel": "prompt",
"placeholder": "V\u00ed d\u1ee5: a neon cyberpunk cat, detailed, 4k",
"requiredField": true
},
{
"fieldType": "dropdown",
"fieldLabel": "Output Format [optional]",
"fieldOptions": {
"values": [
{
"option": "png"
},
{
"option": "jpeg"
}
]
}
},
{
"fieldType": "dropdown",
"fieldLabel": "Image Size [optional]",
"fieldOptions": {
"values": [
{
"option": "16:9"
},
{
"option": "9:16"
},
{
"option": "1:1"
},
{
"option": "3:4"
},
{
"option": "4:3"
}
]
}
},
{
"fieldLabel": "image_url_1 [optional]",
"placeholder": "https://example.com/input.jpg"
},
{
"fieldLabel": "image_url_2 [optional]"
},
{
"fieldLabel": "image_url_3 [optional]"
},
{
"fieldLabel": "image_url_4 [optional]"
},
{
"fieldLabel": "image_url_5 [optional]"
}
]
},
"formDescription": "Enter the prompt and (optionally) the original image link for the Banana API to generate a new image."
},
"typeVersion": 2.2
},
{
"id": "aa769a6a-0170-4851-82b8-0169eca8ec4a",
"name": "Submit \u2014 Banana API",
"type": "n8n-nodes-base.httpRequest",
"position": [
1072,
1136
],
"parameters": {
"url": "https://bananaapi.com/api/n8n/generate/",
"method": "POST",
"options": {},
"jsonBody": "={\n \"input\": {\n \"prompt\": \"{{ $json.prompt }}\",\n \"image_size\": \"{{ $json['Image Size [optional]'] }}\",\n \"output_format\": \"{{ $json['Output Format [optional]'] }}\",\n \"image_urls\": [\"{{ $json['image_url_1 [optional]'] }}\",\"{{ $json['image_url_2 [optional]'] }}\",\"{{ $json['image_url_3 [optional]'] }}\",\"{{ $json['image_url_4 [optional]'] }}\",\"{{ $json['image_url_5 [optional]'] }}\"]\n }\n}",
"sendBody": true,
"sendHeaders": true,
"specifyBody": "json",
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
},
{
"name": "Authorization",
"value": "=Bearer {{ $json.api_token }}"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "c3522fe8-9442-4fcc-a2d2-cd90ac3fef15",
"name": "Wait 5s",
"type": "n8n-nodes-base.wait",
"position": [
1472,
1136
],
"parameters": {},
"typeVersion": 1.1
},
{
"id": "037eee00-f9da-41bc-b508-6bb3fa87c68a",
"name": "Check Status",
"type": "n8n-nodes-base.httpRequest",
"position": [
1632,
1136
],
"parameters": {
"url": "=https://bananaapi.com/api/n8n/image-status/{{$('Submit \u2014 Banana API').item.json.taskId}}",
"options": {}
},
"typeVersion": 4.2
},
{
"id": "749b2fd0-650c-4b31-9527-c7b84a2c7357",
"name": "Wait 5s (loop)",
"type": "n8n-nodes-base.wait",
"position": [
2048,
1088
],
"parameters": {},
"typeVersion": 1.1
},
{
"id": "3d5b6f8d-364b-4a48-82cb-fc5409502788",
"name": "Return Links",
"type": "n8n-nodes-base.set",
"position": [
2528,
1056
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "80fd7573-3eac-4fc4-aced-b122e5eac718",
"name": "image_url",
"type": "string",
"value": "={{$json.imageUrl}}"
},
{
"id": "26339522-2fe9-48f6-aafd-e1aa9ed89327",
"name": "task_id",
"type": "string",
"value": "={{$('Submit \u2014 Banana API').item.json.taskId}}"
},
{
"id": "3e26803c-640d-463d-b857-a3bd29ea2358",
"name": "status",
"type": "string",
"value": "={{$json.status}}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "01a74ecd-93e3-4eb3-ab72-3ab82a008294",
"name": "If",
"type": "n8n-nodes-base.if",
"position": [
1808,
1072
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "4e3a3b7c-61e8-49c4-abf7-5eb3db4a3eef",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $('Check Status').item.json.status }}",
"rightValue": "=completed"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "0f715abf-ae0a-42d5-8647-5e9488cd3f9d",
"name": "NOTE \u2014 Overview",
"type": "n8n-nodes-base.stickyNote",
"position": [
400,
448
],
"parameters": {
"color": 3,
"width": 480,
"height": 336,
"content": "## Overview\nThis workflow integrates **BananaAPI.com** with the **Google Nano Banana** image generation engine. Users can submit prompts and optional reference images via a form, then the workflow calls BananaAPI.com, checks the task status in a loop, and finally returns the generated image link.\n\n**Why use it?**\n- Cost effective: only **$0.025 per image**\n- **Pay-as-you-go**: pay only for what you use\n- **Credits never expire**: no monthly subscription pressure\n\nIdeal for creators, marketers, and developers who want affordable and automated image generation."
},
"typeVersion": 1
},
{
"id": "71c558a9-d4e5-4ba2-8dc1-170e8a4ba0db",
"name": "NOTE \u2014 Prerequisites",
"type": "n8n-nodes-base.stickyNote",
"position": [
880,
448
],
"parameters": {
"color": 3,
"width": 480,
"height": 336,
"content": "## Prerequisites\n- **BananaAPI.com account + API key (Bearer)** \u2014 create your key at https://bananaapi.com/api\n- An **n8n instance** (Cloud or self-hosted)\n- Basic knowledge of AI prompts to get the best quality images\n\n\u26a0\ufe0f Never commit or share your API key publicly. Use **n8n Credentials** for production setups."
},
"typeVersion": 1
},
{
"id": "77a8c9f2-61af-4e2e-9ba4-6c3ca1494567",
"name": "NOTE \u2014 Step 1 (Form Input)",
"type": "n8n-nodes-base.stickyNote",
"position": [
400,
800
],
"parameters": {
"width": 464,
"height": 496,
"content": "## Step 1 \u2014 User Form Input\nThe **Form Trigger** asks the user to provide:\n- `api_token` (required) \u2014 Banana API Bearer YOUR_TOKEN_HERE\n- `prompt` (required) \u2014 image description (e.g. *\u201ca neon cyberpunk cat, detailed, 4k\u201d*)\n- `Output Format [optional]` \u2014 choose PNG or JPEG\n- `Image Size [optional]` \u2014 16:9, 9:16, 1:1, 3:4, 4:3\n- `image_url_1 ... image_url_5 [optional]` \u2014 reference images for editing or transformation"
},
"typeVersion": 1
},
{
"id": "5ae4ce78-4f6c-4148-8485-a90d21ba32dd",
"name": "NOTE \u2014 Step 2 (POST Request)",
"type": "n8n-nodes-base.stickyNote",
"position": [
896,
800
],
"parameters": {
"width": 464,
"height": 496,
"content": "## Step 2 \u2014 Submit to Banana API\nThe **HTTP POST** node sends the request:\n- URL: `https://bananaapi.com/api/n8n/generate/`\n- Headers:\n - `Content-Type: application/json`\n - `Authorization: Bearer {{ $json.api_token }}`\n- JSON Body includes:\n - `prompt`\n - `image_size`\n - `output_format`\n - `image_urls` (array of up to 5)\n\nBananaAPI will return a `taskId` to track progress."
},
"typeVersion": 1
},
{
"id": "3c7bfc47-5d0f-45fb-a53f-25c24d2ed1f5",
"name": "NOTE \u2014 Step 3 (Processing)",
"type": "n8n-nodes-base.stickyNote",
"position": [
1392,
800
],
"parameters": {
"width": 912,
"height": 496,
"content": "## Step 3 \u2014 Processing\nBananaAPI forwards the request to the **Nano Banana** engine, which generates or edits the image based on the prompt and optional input images.\n\n\u23f1 Average generation time: a few seconds to ~1 minute, depending on complexity and server load.\n- After 5s wait, the workflow calls:\n `GET https://bananaapi.com/api/n8n/image-status/{{ taskId }}`\n- If `status != completed`, the loop waits 5s and retries\n- When `status = completed`, the workflow continues"
},
"typeVersion": 1
},
{
"id": "583222b7-f53c-4376-8958-4c544c4ace60",
"name": "NOTE \u2014 Step 5 (Output)",
"type": "n8n-nodes-base.stickyNote",
"position": [
2336,
800
],
"parameters": {
"width": 464,
"height": 496,
"content": "## Step 4 \u2014 Return Output\nWhen completed, the **Set node** outputs:\n- `image_url` \u2014 the final generated image link\n- `task_id` \u2014 the task reference ID\n- `status` \u2014 task completion state\n\n\ud83d\udca1 Tip: Add a **Webhook Response** node to return a clean JSON payload for frontend apps."
},
"typeVersion": 1
},
{
"id": "abfd4d9f-d7be-4a74-87ae-8618a6ff826a",
"name": "NOTE \u2014 API Reference",
"type": "n8n-nodes-base.stickyNote",
"position": [
2320,
448
],
"parameters": {
"color": 3,
"width": 480,
"height": 336,
"content": "## API Reference\n- **POST** `https://bananaapi.com/api/n8n/generate/`\n- **GET** `https://bananaapi.com/api/n8n/image-status/{taskId}`\n\nDocs: https://bananaapi.com/api\n\n\u2705 Always include `Authorization: Bearer <token>` in headers."
},
"typeVersion": 1
},
{
"id": "5074a457-5ec7-4a5c-81bc-54c120818b08",
"name": "NOTE \u2014 Pricing Advantages",
"type": "n8n-nodes-base.stickyNote",
"position": [
1360,
448
],
"parameters": {
"color": 3,
"width": 480,
"height": 336,
"content": "## Pricing Advantages\n- **Only $0.025 per image** \u2014 very cost-effective\n- **Pay-as-you-go**: no monthly subscription\n- **Credits never expire** \u2014 use anytime, no rush\n\nPerfect for scaling automation workflows or experimenting without wasted costs."
},
"typeVersion": 1
},
{
"id": "1d11806a-56e9-4e02-9aeb-5dfef750b1ae",
"name": "NOTE \u2014 Troubleshooting",
"type": "n8n-nodes-base.stickyNote",
"position": [
1840,
448
],
"parameters": {
"color": 3,
"width": 480,
"height": 336,
"content": "## Troubleshooting\n- **401/403 Unauthorized** \u2192 Check Authorization header (`Bearer YOUR_TOKEN_HERE`)\n- **Invalid JSON** \u2192 Ensure POST body is valid JSON (double quotes, no trailing commas)\n- **No imageUrl returned** \u2192 Task still pending; wait longer or re-check taskId\n- **Slow performance** \u2192 Increase wait interval from 5s to 8\u201310s"
},
"typeVersion": 1
}
],
"connections": {
"If": {
"main": [
[
{
"node": "Return Links",
"type": "main",
"index": 0
}
],
[
{
"node": "Wait 5s (loop)",
"type": "main",
"index": 0
}
]
]
},
"Wait 5s": {
"main": [
[
{
"node": "Check Status",
"type": "main",
"index": 0
}
]
]
},
"Check Status": {
"main": [
[
{
"node": "If",
"type": "main",
"index": 0
}
]
]
},
"Wait 5s (loop)": {
"main": [
[
{
"node": "Check Status",
"type": "main",
"index": 0
}
]
]
},
"Form \u2014 Get Prompt": {
"main": [
[
{
"node": "Submit \u2014 Banana API",
"type": "main",
"index": 0
}
]
]
},
"Submit \u2014 Banana API": {
"main": [
[
{
"node": "Wait 5s",
"type": "main",
"index": 0
}
]
]
}
}
}
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About this workflow
This workflow integrates BananaAPI.com with the Nano Banana image engine to generate or edit AI images from text prompts and optional reference images.
Source: https://n8n.io/workflows/8375/ — original creator credit. Request a take-down →
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