40
A2A
Capture LINE receipt expenses with Gemini, Google Drive and Google Sheets
n8n-workflow-20073.n8n.io
· n8n.io
Quick overview This workflow receives receipt images from LINE, uses Google Gemini to extract structured expense data, verifies Japanese invoice T-numbers via the NTA Web-API, archives the image in Google Drive, logs the expense to Google Sheets, and replies to the user in LINE. How it works 1. Receives a POST webhook from LINE and extracts the message type, message ID, reply token, and user ID. 2. If the incoming event is not an image, sends a LINE reply instructing the user to send a receipt photo. 3. For image messages, downloads the image from LINE, uploads it to Google Drive, and converts it to Base64. 4. Sends the image to Google Gemini to decide whether it is a receipt and to extract receipt date, vendor, totals, tax, category, description, and any T-number. 5. If Gemini indicates the image is not a receipt, replies in LINE asking the user to retake and resend the photo. 6. If a valid-looking T-number is present, calls the NTA invoice validity endpoint for the receipt date and c
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Trust score
19/100
grade F · 9 criteria
Uptime
not measured
no direct probes in 30d
Observed inflow · 30d
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no payment wallet declared
Invocations · 7d
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Card drift · 7d
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F
Conformance score: 19/100
F-grade: card is reachable but fails most operational signals.
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F
Conformance score: 19/100
F-grade: card is reachable but fails most operational signals.
pass
Valid AgentCard
10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
info
Live JSON-RPC
0/25
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fail
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0/10
No protocolVersion in card.
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Add `"protocolVersion": "1.0"` (Major.Minor, no patch number — §3.6) to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
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JWS signature
0/10
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fail
Skill declaration
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Freshness + modern flags
4/5
seen in upstream source within 0d
info
Security declaration
0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
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Activity (audit trail)
last 24h · 0 invocations Public aggregate · no PII recordedNothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.
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not measured
0 direct probes · 30d
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Streaming
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SSE-capable
Endpoints
| Agent card | https://n8n.io/workflows/20073 |
| Provider | https://n8n.io |
| Docs | https://n8n.io/workflows/20073 |
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Raw agent card JSON
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"url": "https://n8n.io/blog/learn-how-to-automatically-cross-post-your-content-with-n8n/",
"icon": "\u270d\ufe0f",
"label": "Learn how to automatically cross-post your content with n8n"
},
{
"url": "https://n8n.io/blog/running-n8n-on-ships-an-interview-with-maranics/",
"icon": "\ud83d\udef3",
"label": "Running n8n on ships: An interview with Maranics"
},
{
"url": "https://n8n.io/blog/how-to-build-a-low-code-self-hosted-url-shortener/",
"icon": "\ud83d\udd17",
"label": "How to build a low-code, self-hosted URL shortener in 3 steps"
},
{
"url": "https://n8n.io/blog/what-are-apis-how-to-use-them-with-no-code/",
"icon": " \ud83e\udea2",
"label": "What are APIs and how to use them with no code"
},
{
"url": "https://n8n.io/blog/5-tasks-you-can-automate-with-notion-api/",
"icon": "\u26a1\ufe0f",
"label": "5 tasks you can automate with the new Notion API "
},
{
"url": "https://n8n.io/blog/how-a-digital-strategist-uses-n8n-for-online-marketing/",
"icon": "\ud83d\udcbb",
"label": "How a digital strategist uses n8n for online marketing"
},
{
"url": "https://n8n.io/blog/the-ultimate-guide-to-automate-your-video-collaboration-with-whereby-mattermost-and-n8n/",
"icon": "\ud83d\udcf9",
"label": "The ultimate guide to automate your video collaboration with Whereby, Mattermost, and n8n"
},
{
"url": "https://n8n.io/blog/how-to-automatically-give-kudos-to-contributors-with-github-slack-and-n8n/",
"icon": "\ud83d\udc4f",
"label": "How to automatically give kudos to contributors with GitHub, Slack, and n8n"
},
{
"url": "https://n8n.io/blog/5-workflow-automations-for-mattermost-that-we-love-at-n8n/",
"icon": "\ud83e\udd16",
"label": "5 workflow automations for Mattermost that we love at n8n"
},
{
"url": "https://n8n.io/blog/why-this-product-manager-loves-workflow-automation-with-n8n/",
"icon": "\ud83e\udde0",
"label": "Why this Product Manager loves workflow automation with n8n"
},
{
"url": "https://n8n.io/blog/creating-custom-incident-response-workflows-with-n8n/",
"label": "How to automate every step of an incident response workflow"
},
{
"url": "https://n8n.io/blog/learn-to-build-powerful-api-endpoints-using-webhooks/",
"icon": "\ud83e\uddf0",
"label": "Learn to Build Powerful API Endpoints Using Webhooks"
},
{
"url": "https://n8n.io/blog/learn-how-to-use-webhooks-with-mattermost-slash-commands/",
"icon": "\ud83e\udd84",
"label": "Learn how to use webhooks with Mattermost slash commands"
},
{
"url": "https://n8n.io/blog/how-goomer-automated-their-operations-with-over-200-n8n-workflows/",
"icon": "\ud83d\udef5",
"label": "How Goomer automated their operations with over 200 n8n workflows"
}
],
"primaryDocumentation": [
{
"url": "https://docs.n8n.io/integrations/builtin/core-nodes/n8n-nodes-base.webhook/"
}
]
},
"categories": [
"Development",
"Core Nodes"
],
"nodeVersion": "1.0",
"codexVersion": "1.0",
"subcategories": {
"Core Nodes": [
"Helpers"
]
}
}
},
"group": "[\"trigger\"]",
"defaults": {
"name": "Webhook"
},
"iconData": {
"type": "file",
"fileBuffer": "data:image/svg+xml;base64,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"
},
"displayName": "Webhook",
"typeVersion": 2,
"nodeCategories": [
{
"id": 5,
"name": "Development"
},
{
"id": 9,
"name": "Core Nodes"
}
]
},
{
"id": 58,
"icon": "file:googleDrive.svg",
"name": "n8n-nodes-base.googleDrive",
"codex": {
"data": {
"resources": {
"generic": [
{
"url": "https://n8n.io/blog/your-business-doesnt-need-you-to-operate/",
"icon": " \ud83d\udda5\ufe0f",
"label": "Hey founders! Your business doesn't need you to operate"
},
{
"url": "https://n8n.io/blog/why-this-product-manager-loves-workflow-automation-with-n8n/",
"icon": "\ud83e\udde0",
"label": "Why this Product Manager loves workflow automation with n8n"
},
{
"url": "https://n8n.io/blog/aws-workflow-automation/",
"label": "7 no-code workflow automations for Amazon Web Services"
}
],
"primaryDocumentation": [
{
"url": "https://docs.n8n.io/integrations/builtin/app-nodes/n8n-nodes-base.googledrive/"
}
],
"credentialDocumentation": [
{
"url": "https://docs.n8n.io/integrations/builtin/credentials/google/oauth-single-service/"
}
]
},
"categories": [
"Data & Storage"
],
"nodeVersion": "1.0",
"codexVersion": "1.0"
}
},
"group": "[\"input\"]",
"defaults": {
"name": "Google Drive"
},
"iconData": {
"type": "file",
"fileBuffer": "data:image/svg+xml;base64,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"
},
"displayName": "Google Drive",
"typeVersion": 3,
"nodeCategories": [
{
"id": 3,
"name": "Data & Storage"
}
]
},
{
"id": 565,
"icon": "fa:sticky-note",
"name": "n8n-nodes-base.stickyNote",
"codex": {
"data": {
"alias": [
"Comments",
"Notes",
"Sticky"
],
"categories": [
"Core Nodes"
],
"nodeVersion": "1.0",
"codexVersion": "1.0",
"subcategories": {
"Core Nodes": [
"Helpers"
]
}
}
},
"group": "[\"input\"]",
"defaults": {
"name": "Sticky Note",
"color": "#FFD233"
},
"iconData": {
"icon": "sticky-note",
"type": "icon"
},
"displayName": "Sticky Note",
"typeVersion": 1,
"nodeCategories": [
{
"id": 9,
"name": "Core Nodes"
}
]
},
{
"id": 834,
"icon": "file:code.svg",
"name": "n8n-nodes-base.code",
"codex": {
"data": {
"alias": [
"cpde",
"Javascript",
"JS",
"Python",
"Script",
"Custom Code",
"Function"
],
"details": "The Code node allows you to execute JavaScript in your workflow.",
"resources": {
"primaryDocumentation": [
{
"url": "https://docs.n8n.io/integrations/builtin/core-nodes/n8n-nodes-base.code/"
}
]
},
"categories": [
"Development",
"Core Nodes"
],
"nodeVersion": "1.0",
"codexVersion": "1.0",
"subcategories": {
"Core Nodes": [
"Helpers",
"Data Transformation"
]
}
}
},
"group": "[\"transform\"]",
"defaults": {
"name": "Code"
},
"iconData": {
"type": "file",
"fileBuffer": "data:image/svg+xml;base64,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"
},
"displayName": "Code",
"typeVersion": 2,
"nodeCategories": [
{
"id": 5,
"name": "Development"
},
{
"id": 9,
"name": "Core Nodes"
}
]
}
]
},
"detail": {
"description": "Quick overview This workflow receives receipt images from LINE, uses Google Gemini to extract structured expense data, verifies Japanese invoice T-numbers via the NTA Web-API, archives the image in Google Drive, logs the expense to Google Sheets, and replies to the user in LINE. How it works 1. Receives a POST webhook from LINE and extracts the message type, message ID, reply token, and user ID. 2. If the incoming event is not an image, sends a LINE reply instructing the user to send a receipt photo. 3. For image messages, downloads the image from LINE, uploads it to Google Drive, and converts it to Base64. 4. Sends the image to Google Gemini to decide whether it is a receipt and to extract receipt date, vendor, totals, tax, category, description, and any T-number. 5. If Gemini indicates the image is not a receipt, replies in LINE asking the user to retake and resend the photo. 6. If a valid-looking T-number is present, calls the NTA invoice validity endpoint for the receipt date and combines the result with the extracted receipt data and Google Drive file link. 7. Appends the final expense record to Google Sheets and sends a confirmation message back to the user in LINE including the invoice validity status. Setup 1. Create LINE Messaging API credentials (Channel Access Token) and configure HTTP header authentication for the LINE download and reply requests. 2. Add a Google Gemini API key (HTTP header auth) and update the Gemini endpoint/model if needed. 3. Connect Google Drive and Google Sheets credentials, then set the target Drive folder ID, Google Sheets document ID, and sheet name. 4. Register for the NTA Invoice System Web-API, replace YOURNTAAPPID in the NTA request URL, and ensure the API is accessible from your n8n instance. 5. Copy the n8n production webhook URL into the LINE Developers console for your bot\u2019s webhook configuration."
}
}