This workflow corresponds to n8n.io template #managecallai-approval-review — we link there as the canonical source.
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 →
{
"name": "ManageCallAI \u2014 Approval Review Queue",
"meta": {
"templateId": "managecallai-approval-review",
"templateCredsSetupCompleted": true
},
"nodes": [
{
"id": "b2c3d4e5-0002-0002-0002-000000000001",
"name": "Webhook Trigger",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
240,
300
],
"parameters": {
"httpMethod": "POST",
"path": "managecall-approvals",
"responseMode": "onReceived",
"options": {
"rawBody": true
}
},
"notes": "Subscribe to: approval.requested"
},
{
"id": "b2c3d4e5-0002-0002-0002-000000000003",
"name": "Verify Signature",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
460,
300
],
"parameters": {
"jsCode": "const crypto = require('crypto');\nfunction verify(item, secret, tol = 300) {\n const h = item.headers ?? {};\n const ts = parseInt(h['x-managecall-timestamp'] ?? '0', 10);\n if (Math.abs(Date.now() / 1000 - ts) > tol) throw new Error('timestamp_expired');\n const body = typeof item.body === 'string' ? item.body : JSON.stringify(item.body ?? {});\n const expected = 'sha256=' + crypto.createHmac('sha256', secret).update(`${ts}.${body}`).digest('hex');\n if (!crypto.timingSafeEqual(Buffer.from(expected), Buffer.from(h['x-managecall-signature-256'] ?? ''))) throw new Error('invalid_signature');\n}\nverify($input.first(), $env.MANAGECALL_WEBHOOK_SECRET);\nreturn $input.all();"
}
},
{
"id": "b2c3d4e5-0002-0002-0002-000000000004",
"name": "Fetch Approval Details",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
680,
300
],
"parameters": {
"method": "GET",
"url": "={{ $env.MANAGECALL_API_URL }}/api/v1/approvals/{{ $json.body.data.approval_id }}",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"options": {}
},
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
}
},
{
"id": "b2c3d4e5-0002-0002-0002-000000000005",
"name": "Post Decision Request to Slack",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
900,
300
],
"parameters": {
"method": "POST",
"url": "={{ $env.SLACK_WEBHOOK_URL }}",
"sendBody": true,
"contentType": "json",
"body": {
"blocks": [
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": ":bell: *Approval Required*\n*Object:* {{ $('Fetch Approval Details').item.json.data.flow_name ?? $json.body.data.object_type }}\n*Action:* {{ $('Fetch Approval Details').item.json.data.action_type }}\n*Approval ID:* `{{ $json.body.data.approval_id }}`"
}
},
{
"type": "actions",
"elements": [
{
"type": "button",
"text": {
"type": "plain_text",
"text": "Approve"
},
"style": "primary",
"value": "approve:{{ $json.body.data.approval_id }}"
},
{
"type": "button",
"text": {
"type": "plain_text",
"text": "Reject"
},
"style": "danger",
"value": "reject:{{ $json.body.data.approval_id }}"
}
]
}
]
},
"options": {}
},
"notes": "Uses Slack Block Kit interactive buttons. Requires a Slack app with interactive components enabled."
},
{
"id": "b2c3d4e5-0002-0002-0002-000000000006",
"name": "Wait for Slack Response",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
1120,
300
],
"parameters": {
"httpMethod": "POST",
"path": "managecall-approval-decision",
"responseMode": "onReceived",
"options": {}
},
"notes": "Set this URL as the Slack interactive components Request URL."
},
{
"id": "b2c3d4e5-0002-0002-0002-000000000008",
"name": "Parse Decision",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
1340,
300
],
"parameters": {
"jsCode": "const payload = JSON.parse($input.first().body.payload ?? '{}');\nconst action = (payload.actions?.[0]?.value ?? '').split(':');\nconst [decision, approvalId] = action;\nif (!decision || !approvalId) throw new Error('Invalid Slack payload');\nreturn [{ json: { decision, approvalId } }];"
}
},
{
"id": "b2c3d4e5-0002-0002-0002-000000000009",
"name": "Route Decision",
"type": "n8n-nodes-base.switch",
"typeVersion": 3,
"position": [
1560,
300
],
"parameters": {
"mode": "rules",
"rules": {
"values": [
{
"conditions": {
"options": {
"caseSensitive": false
},
"conditions": [
{
"leftValue": "={{ $json.decision }}",
"rightValue": "approve",
"operator": {
"type": "string",
"operation": "equals"
}
}
]
}
},
{
"conditions": {
"options": {
"caseSensitive": false
},
"conditions": [
{
"leftValue": "={{ $json.decision }}",
"rightValue": "reject",
"operator": {
"type": "string",
"operation": "equals"
}
}
]
}
}
]
}
}
},
{
"id": "b2c3d4e5-0002-0002-0002-000000000010",
"name": "POST Approve",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1780,
200
],
"parameters": {
"method": "POST",
"url": "={{ $env.MANAGECALL_API_URL }}/api/v1/approvals/{{ $json.approvalId }}/approve",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"sendBody": true,
"contentType": "json",
"body": {},
"options": {}
},
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
},
"notes": "API key must have tenant.approvals.decide capability."
},
{
"id": "b2c3d4e5-0002-0002-0002-000000000011",
"name": "POST Reject",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1780,
400
],
"parameters": {
"method": "POST",
"url": "={{ $env.MANAGECALL_API_URL }}/api/v1/approvals/{{ $json.approvalId }}/reject",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"sendBody": true,
"contentType": "json",
"body": {
"note": "Rejected via Slack review workflow"
},
"options": {}
},
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
}
}
],
"connections": {
"Webhook Trigger": {
"main": [
[
{
"node": "Verify Signature",
"type": "main",
"index": 0
}
]
]
},
"Verify Signature": {
"main": [
[
{
"node": "Fetch Approval Details",
"type": "main",
"index": 0
}
]
]
},
"Fetch Approval Details": {
"main": [
[
{
"node": "Post Decision Request to Slack",
"type": "main",
"index": 0
}
]
]
},
"Post Decision Request to Slack": {
"main": [
[
{
"node": "Wait for Slack Response",
"type": "main",
"index": 0
}
]
]
},
"Wait for Slack Response": {
"main": [
[
{
"node": "Parse Decision",
"type": "main",
"index": 0
}
]
]
},
"Parse Decision": {
"main": [
[
{
"node": "Route Decision",
"type": "main",
"index": 0
}
]
]
},
"Route Decision": {
"main": [
[
{
"node": "POST Approve",
"type": "main",
"index": 0
}
],
[
{
"node": "POST Reject",
"type": "main",
"index": 0
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
}
}
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.
httpHeaderAuth
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About this workflow
ManageCallAI — Approval Review Queue. Uses httpRequest. Webhook trigger; 9 nodes.
Source: https://github.com/gokbilge/manageCallAI/blob/main/docs/examples/n8n/approval-review.json — original creator credit. Request a take-down →
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