Tollgate Budget Gate

The workflow JSON

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{
  "name": "Tollgate Budget Gate",
  "nodes": [
    {
      "parameters": {},
      "id": "1",
      "name": "Manual Trigger",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        0,
        0
      ]
    },
    {
      "parameters": {
        "method": "GET",
        "url": "http://127.0.0.1:8787/v1/budget",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "X-Consumer-Key",
              "value": "n8n"
            },
            {
              "name": "Authorization",
              "value": "Bearer n8n"
            }
          ]
        },
        "options": {}
      },
      "id": "2",
      "name": "Budget",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        260,
        0
      ]
    },
    {
      "parameters": {
        "conditions": {
          "boolean": [
            {
              "value1": "={{ $json.consumer_limits.allowed !== false }}",
              "value2": true
            }
          ]
        }
      },
      "id": "3",
      "name": "Allowed?",
      "type": "n8n-nodes-base.if",
      "typeVersion": 1,
      "position": [
        520,
        0
      ]
    },
    {
      "parameters": {
        "method": "POST",
        "url": "http://127.0.0.1:8787/v1/chat/completions",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Authorization",
              "value": "Bearer n8n"
            },
            {
              "name": "Content-Type",
              "value": "application/json"
            }
          ]
        },
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={\n  \"model\": \"tollgate/free\",\n  \"messages\": [\n    { \"role\": \"user\", \"content\": \"Budget OK \u2014 reply with BUDGET_PASS\" }\n  ],\n  \"max_tokens\": 32\n}",
        "options": {}
      },
      "id": "4",
      "name": "Chat if allowed",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        780,
        -80
      ]
    },
    {
      "parameters": {
        "values": {
          "string": [
            {
              "name": "blocked",
              "value": "={{ $json.consumer_limits.reason || 'budget denied' }}"
            }
          ]
        },
        "options": {}
      },
      "id": "5",
      "name": "Blocked",
      "type": "n8n-nodes-base.set",
      "typeVersion": 2,
      "position": [
        780,
        100
      ]
    }
  ],
  "connections": {
    "Manual Trigger": {
      "main": [
        [
          {
            "node": "Budget",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Budget": {
      "main": [
        [
          {
            "node": "Allowed?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Allowed?": {
      "main": [
        [
          {
            "node": "Chat if allowed",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Blocked",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "meta": {
    "notes": "Docker n8n: replace 127.0.0.1 with host.docker.internal. Auth mode: Bearer n8n:<secret>."
  }
}

About this workflow

Tollgate Budget Gate. Uses httpRequest. Event-driven trigger; 5 nodes.

Source: https://github.com/landjunge/tollgate/blob/main/configs/n8n-budget-gate.workflow.json — original creator credit. Request a take-down →

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