Agent-approval-gate (reference)

The workflow JSON

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{
  "name": "agent-approval-gate (reference)",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "agent-proposal",
        "options": {}
      },
      "name": "Webhook: ProposedAction in",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 1,
      "position": [
        240,
        300
      ]
    },
    {
      "parameters": {
        "functionCode": "const a = $json.body || $json;\nconst required = ['proposal_id','agent','action_type','payload','created_at','tenant'];\nfor (const k of required) {\n  if (!(k in a)) throw new Error('ProposedAction missing field: ' + k);\n}\nconst allowed = ['email.send','crm.update_record','ticket.create','db.update_row','api.call','n8n.trigger_workflow'];\nif (!allowed.includes(a.action_type)) throw new Error('Unknown action_type: ' + a.action_type);\nif (a.expires_at && new Date(a.expires_at) < new Date()) throw new Error('Proposal already expired');\nreturn [{json: a}];"
      },
      "name": "Validate against schema",
      "type": "n8n-nodes-base.function",
      "typeVersion": 1,
      "position": [
        460,
        300
      ]
    },
    {
      "parameters": {
        "chatId": "={{$env.TG_APPROVER_CHAT_ID}}",
        "text": "=*Proposed action:* `{{$json.action_type}}`\n*Tenant:* `{{$json.tenant}}`\n*Agent:* `{{$json.agent.name}}` v{{$json.agent.version}}\n*Risk:* {{$json.risk || 'unspecified'}}\n*Expires:* {{$json.expires_at || 'never'}}\n\n*Rationale:*\n{{$json.rationale}}\n\n*Payload:*\n```\n{{JSON.stringify($json.payload, null, 2)}}\n```\n\nReply `approve {{$json.proposal_id}}` or `reject {{$json.proposal_id}}` to decide.",
        "additionalFields": {
          "parse_mode": "Markdown"
        }
      },
      "name": "Send to approver (Telegram)",
      "type": "n8n-nodes-base.telegram",
      "typeVersion": 1,
      "position": [
        680,
        300
      ]
    },
    {
      "parameters": {
        "functionCode": "const proposal = $json;\nconst record = {\n  event: 'proposed',\n  proposal_id: proposal.proposal_id,\n  tenant: proposal.tenant,\n  action_type: proposal.action_type,\n  agent: proposal.agent,\n  payload: proposal.payload,\n  rationale: proposal.rationale,\n  created_at: proposal.created_at,\n  logged_at: new Date().toISOString()\n};\nreturn [{json: record}];"
      },
      "name": "Append to audit log",
      "type": "n8n-nodes-base.function",
      "typeVersion": 1,
      "position": [
        900,
        300
      ]
    }
  ],
  "connections": {
    "Webhook: ProposedAction in": {
      "main": [
        [
          {
            "node": "Validate against schema",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Validate against schema": {
      "main": [
        [
          {
            "node": "Send to approver (Telegram)",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Send to approver (Telegram)": {
      "main": [
        [
          {
            "node": "Append to audit log",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": false,
  "settings": {},
  "tags": [
    "agent-approval-gate",
    "ai-automation"
  ]
}

About this workflow

agent-approval-gate (reference). Uses telegram. Webhook trigger; 4 nodes.

Source: https://github.com/renezander030/agent-approval-gate/blob/37ce0fc7af206536afd04b2d591614f76dbf9517/examples/n8n-approval-workflow.json — original creator credit. Request a take-down →

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