Le Nguyen This workflow corresponds to n8n.io template #8675 — we link there as the canonical source.
The workflow JSON
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{
"nodes": [
{
"id": "df8fb435-f49e-4dec-8ed5-0b5b536ceab3",
"name": "Store to SD & Pass token",
"type": "n8n-nodes-base.code",
"position": [
336,
0
],
"parameters": {
"jsCode": "const sd = $getWorkflowStaticData('global');\nconst r = $input.first().json || {};\nconst now = Date.now();\nsd.zalo = sd.zalo || {};\nif (r.access_token) sd.zalo.access_token = r.access_token;\nif (r.refresh_token) sd.zalo.refresh_token = r.refresh_token;\nconst exp = parseInt(r.expires_in, 10);\nif (!isNaN(exp)) sd.zalo.access_expires_at = now + exp * 1000;\nconst rExp = parseInt(r.refresh_token_expires_in, 10);\nif (!isNaN(rExp)) sd.zalo.refresh_expires_at = now + rExp * 1000;\n// IMPORTANT: return the refreshed token in the CURRENT ITEM\nreturn [{ json: {\n source: \"refreshed\",\n access_token: sd.zalo.access_token,\n access_expires_at: sd.zalo.access_expires_at\n}}];"
},
"typeVersion": 2
},
{
"id": "5676141d-7a9e-4872-900a-48d7a7c59cc2",
"name": "Refresh Token (Zalo v4)",
"type": "n8n-nodes-base.httpRequest",
"position": [
64,
0
],
"parameters": {
"url": "https://oauth.zaloapp.com/v4/oa/access_token",
"method": "POST",
"options": {
"response": {
"response": {
"responseFormat": "json"
}
}
},
"sendBody": true,
"contentType": "form-urlencoded",
"sendHeaders": true,
"bodyParameters": {
"parameters": [
{
"name": "refresh_token",
"value": "={{ $json.refresh_token }}"
},
{
"name": "app_id",
"value": "={{ $json.app_id }}"
},
{
"name": "grant_type",
"value": "refresh_token"
}
]
},
"headerParameters": {
"parameters": [
{
"name": "secret_key",
"value": "={{ $('Set Refresh Token and App ID').item.json.secret_key }}"
}
]
}
},
"typeVersion": 3
},
{
"id": "65bbbd29-24ae-475d-80d2-674da63db2eb",
"name": "Schedule Trigger",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-848,
16
],
"parameters": {
"rule": {
"interval": [
{
"field": "hours",
"hoursInterval": 12
}
]
}
},
"typeVersion": 1.2
},
{
"id": "62cbb107-ef08-4b09-b061-ecb9ae02c626",
"name": "Execute_Node",
"type": "n8n-nodes-base.webhook",
"position": [
-848,
-176
],
"parameters": {
"path": "99397651-be96-4106-9017-3e62f0ddf03e",
"options": {},
"httpMethod": "POST"
},
"typeVersion": 2.1
},
{
"id": "21029f3c-0080-4950-80f5-965cc4259239",
"name": "Clean Zalo Static Data",
"type": "n8n-nodes-base.code",
"position": [
-608,
-176
],
"parameters": {
"jsCode": "const sd = $getWorkflowStaticData('global');\ndelete sd['zalo'];\nreturn [{ json: { cleared: true } }];\n"
},
"typeVersion": 2
},
{
"id": "d80a21bf-9e3a-4125-9657-38520907f78a",
"name": "Set Refresh Token and App ID",
"type": "n8n-nodes-base.set",
"position": [
-384,
0
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "125b6083-9cac-4c88-b1c9-968cfe06a5d3",
"name": "refresh_token",
"type": "string",
"value": "refresh_token_initial_refesh_token"
},
{
"id": "d8e706c2-9609-4780-95d7-e3c5297a0cee",
"name": "app_id",
"type": "string",
"value": "your_oa_app_id"
},
{
"id": "8230a16f-3100-4fdb-9125-317f1c63fd23",
"name": "secret_key",
"type": "string",
"value": "your_app_secret_key"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "37a79c0a-08c2-4a9b-9655-aa2e49c2f36c",
"name": "Load to Static Data",
"type": "n8n-nodes-base.code",
"position": [
-176,
0
],
"parameters": {
"jsCode": "const sd = $getWorkflowStaticData('global');\nconst now = Date.now();\nconst bufferMs = 90 * 1000; // refresh 90s early\nsd.zalo = sd.zalo || {};\nconsole.log('new code #### here this is',sd.zalo);\n// Seed refresh token on very first run\nif (!sd.zalo.refresh_token) {\n sd.zalo.refresh_token = $input.first().json.refresh_token;\n}\n\nconst hasAccess = !!sd.zalo.access_token;\nconst notExpired = !!sd.zalo.access_expires_at && (sd.zalo.access_expires_at - bufferMs) > now;\nconst needs_refresh = !(hasAccess && notExpired);\n\nreturn [{\n json: {\n needs_refresh,\n access_token: sd.zalo.access_token || null,\n access_expires_at: sd.zalo.access_expires_at || null,\n refresh_token: sd.zalo.refresh_token || null,\n app_id: $input.first().json.app_id\n }\n}];"
},
"typeVersion": 2
},
{
"id": "25f68c0d-9eef-43be-accc-60bae7d62065",
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"position": [
-848,
240
],
"parameters": {
"path": "zalo-intergration-v1",
"options": {},
"httpMethod": "POST"
},
"typeVersion": 2.1
},
{
"id": "e96e8fdf-e031-4afc-b1ab-b6f1b9837158",
"name": "Load Access Token",
"type": "n8n-nodes-base.code",
"position": [
-592,
240
],
"parameters": {
"jsCode": "const sd = $getWorkflowStaticData('global');\nsd.zalo = sd.zalo || {};\nreturn [{\n json: {\n access_token: sd.zalo.access_token || null,\n access_expires_at: sd.zalo.access_expires_at || null,\n refresh_token: sd.zalo.refresh_token || null,\n }\n}];"
},
"typeVersion": 2
},
{
"id": "43e752b8-ec85-4764-addb-71383e69217d",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1856,
-848
],
"parameters": {
"width": 944,
"height": 1712,
"content": "# Zalo OA Token Auto-Refresh (n8n)\n\n## What this workflow does\n- Maintains a fresh Zalo OA access token using Workflow Static Data (global).\n- Supports both scheduled refresh and a manual \u201creset & re-seed\u201d path.\n- Exposes a lightweight webhook to read the currently cached token for other integrations.\n\n---\n\n## High-level flow\nSchedule Trigger \u2192 Set Refresh Token & App ID \u2192 Load to Static Data \u2192 Refresh Token (Zalo v4) \u2192 Store to SD & Pass token\n\nManual reset path: Execute_Node (Webhook) \u2192 Clean Zalo Static Data \u2192 Set Refresh Token & App ID \u2192 \u2026 (continues flow above)\n\nToken peek path: Webhook (zalo-intergration-v1) \u2192 Load Access Token (returns cached token)\n\n---\n\n## Node-by-node\n\n### 1) Schedule Trigger\nRuns the auto-refresh flow on a fixed interval (every 12 hours) so the access token stays valid.\n\n### 2) Execute_Node (Webhook)\nManual entry point to trigger a reset of cached tokens during testing or when rotating credentials.\n\n### 3) Clean Zalo Static Data\nClears the token cache from Workflow Static Data so the next run re-seeds and refreshes from provided inputs.\n\n### 4) Set Refresh Token and App ID\nProvides the required identifiers and secrets to the flow (refresh token, app ID, secret key). \nTip: In production, reference environment variables instead of hardcoding.\n\n### 5) Load to Static Data\nInitializes the token cache on first run, checks if a valid access token already exists, and flags whether a refresh is needed (early-refresh buffer applied). \nNote: With the current wiring, the flow proceeds to refresh on every run.\n\n### 6) Refresh Token (Zalo v4)\nCalls Zalo OAuth to exchange the refresh token for a new access token and returns updated expiry information.\n\n### 7) Store to SD & Pass token\nPersists the latest token and expiry timestamps into Workflow Static Data and passes the current access token forward for immediate downstream use.\n\n### 8) Webhook (zalo-intergration-v1)\nSimple endpoint to request whatever token is currently cached (useful for other services/workflows).\n\n### 9) Load Access Token\nReads the cached access token and its expiry from Workflow Static Data and returns them to the caller of the integration webhook.\n\n---\n\n## Behavior & usage notes\n- The token cache is scoped to this workflow. Other workflows should call this one or use the integration webhook to retrieve the token.\n- An early-refresh buffer reduces the chance of token expiry during active API calls.\n- Secure the manual reset webhook (e.g., IP allowlist or secret) and move sensitive values to environment variables.\n- Optional optimization: insert an IF condition after \u201cLoad to Static Data\u201d to skip the refresh call when the cached token is still valid.\n"
},
"typeVersion": 1
}
],
"connections": {
"Webhook": {
"main": [
[
{
"node": "Load Access Token",
"type": "main",
"index": 0
}
]
]
},
"Execute_Node": {
"main": [
[
{
"node": "Clean Zalo Static Data",
"type": "main",
"index": 0
}
]
]
},
"Schedule Trigger": {
"main": [
[
{
"node": "Set Refresh Token and App ID",
"type": "main",
"index": 0
}
]
]
},
"Load to Static Data": {
"main": [
[
{
"node": "Refresh Token (Zalo v4)",
"type": "main",
"index": 0
}
]
]
},
"Clean Zalo Static Data": {
"main": [
[
{
"node": "Set Refresh Token and App ID",
"type": "main",
"index": 0
}
]
]
},
"Refresh Token (Zalo v4)": {
"main": [
[
{
"node": "Store to SD & Pass token",
"type": "main",
"index": 0
}
]
]
},
"Set Refresh Token and App ID": {
"main": [
[
{
"node": "Load to Static Data",
"type": "main",
"index": 0
}
]
]
}
}
}
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About this workflow
This workflow keeps your Zalo Official Account access token valid and easy to reuse across other flows—no external server required.
Source: https://n8n.io/workflows/8675/ — original creator credit. Request a take-down →
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