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OpenAI响应API适配器 - LLM与AI智能体工作流

高级

这是一个Engineering, AI领域的自动化工作流，包含 19 个节点。主要使用 If, Code, Webhook, HttpRequest, Agent 等节点，结合人工智能技术实现智能自动化。 面向LLM和AI智能体工作流的OpenAI响应API适配器

前置要求
  • •HTTP Webhook 端点（n8n 会自动生成）
  • •可能需要目标 API 的认证凭证
  • •OpenAI API Key

使用的节点 (19)

If
Code
Webhook
StickyNote
HttpRequest
Agent
RespondToWebhook
ChatTrigger
LmChatOpenAi

分类

工程
人工智能
工作流预览
可视化展示节点连接关系，支持缩放和平移
React Flow
导出工作流
复制以下 JSON 配置到 n8n 导入，即可使用此工作流
{
  "meta": {
    "instanceId": "408f9fb9940c3cb18ffdef0e0150fe342d6e655c3a9fac21f0f644e8bedabcd9",
    "templateCredsSetupCompleted": true
  },
  "nodes": [
    {
      "id": "8531ff8a-b247-4baa-a85b-11512fc2bb60",
      "name": "当收到聊天消息时",
      "type": "@n8n/n8n-nodes-langchain.chatTrigger",
      "position": [
        -320,
        -500
      ],
      "webhookId": "f24f59f8-7ea5-4165-be02-d47bdcae52fa",
      "parameters": {
        "public": true,
        "options": {
          "allowFileUploads": true
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "a039b516-a74a-4ea6-8583-abec9bf2a1f8",
      "name": "AI Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        -120,
        -500
      ],
      "parameters": {
        "options": {
          "passthroughBinaryImages": true,
          "returnIntermediateSteps": true
        }
      },
      "typeVersion": 1.9
    },
    {
      "id": "454a16ea-9bcf-4cb8-a62d-95a1aedea974",
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        -320,
        160
      ],
      "webhookId": "211b7574-f96a-429e-a2bf-c19c0fec5e9e",
      "parameters": {
        "path": "n8n-responses-api/models",
        "options": {},
        "responseMode": "responseNode"
      },
      "typeVersion": 2
    },
    {
      "id": "3fca113b-f259-4495-a52c-89f3c09748c0",
      "name": "OpenAI 模型",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -100,
        160
      ],
      "parameters": {
        "url": "https://api.openai.com/v1/models",
        "options": {},
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "openAiApi"
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "bee5a8d3-e18a-4756-99ea-7d14fa08e2f5",
      "name": "POST ChatCompletions",
      "type": "n8n-nodes-base.webhook",
      "position": [
        460,
        240
      ],
      "webhookId": "e8c56164-1825-4ac4-9c23-d209f4907458",
      "parameters": {
        "path": "n8n-responses-api/chat/completions",
        "options": {},
        "httpMethod": "POST",
        "responseMode": "responseNode"
      },
      "typeVersion": 2
    },
    {
      "id": "974fd565-c1cf-468a-827f-391bd013e145",
      "name": "模型响应",
      "type": "n8n-nodes-base.respondToWebhook",
      "position": [
        120,
        160
      ],
      "parameters": {
        "options": {
          "responseCode": 200,
          "responseHeaders": {
            "entries": [
              {
                "name": "Content-Type",
                "value": "application/json"
              }
            ]
          }
        },
        "respondWith": "json",
        "responseBody": "={{ $json }}"
      },
      "typeVersion": 1.2
    },
    {
      "id": "6a4bfb20-5562-4500-9ee2-521f848d3825",
      "name": "重新映射到响应 API 模式",
      "type": "n8n-nodes-base.code",
      "position": [
        680,
        240
      ],
      "parameters": {
        "mode": "runOnceForEachItem",
        "jsCode": "function tranformContent(content) {\n  return [].concat(content).map(content => {\n    if (typeof content === 'string') {\n      return { type: \"input_text\", text: content };\n    }\n    return {\n      type: getInputType(content.type),\n      [content.type]: content[content.type].url\n    }\n  })\n};\n\nfunction getInputType(type) {\n  if (type === 'image_url') return 'input_image';\n  if (type === 'file_url') return 'input_file';\n  return 'input_text';\n}\n\nconst input = $input.item.json.body.messages.map(message => ({\n  role: message.role,\n  content: tranformContent(message.content)\n}));\n\nreturn { input };"
      },
      "typeVersion": 2
    },
    {
      "id": "5f4f22c9-f333-469c-a915-8f5da6443e53",
      "name": "OpenAI 响应 API",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        900,
        240
      ],
      "parameters": {
        "url": "https://api.openai.com/v1/responses",
        "method": "POST",
        "options": {},
        "jsonBody": "={{\n{\n  model: $('POST ChatCompletions').first().json.body.model,\n  stream: $('POST ChatCompletions').first().json.body.stream,\n  input: $json.input,\n}\n}}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "openAiApi"
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "5242a76d-9649-469b-ba91-e33d0f42850e",
      "name": "是代理吗？",
      "type": "n8n-nodes-base.if",
      "position": [
        1100,
        240
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "213702bf-d5c2-4a8a-b5c8-e55f804e4496",
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              },
              "leftValue": "={{ $('POST ChatCompletions').first().json.body.stream }}",
              "rightValue": ""
            }
          ]
        }
      },
      "typeVersion": 2.2
    },
    {
      "id": "4ecc0ec2-4637-48d9-9157-0a6dc39bab9e",
      "name": "n8n Webhook",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        -140,
        -320
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4o-mini"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "PeoQjbPq9TxC5Fnf",
          "name": "n8n Document Understanding"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "d050bfc1-ce7a-4ae2-b4b1-763be76b8061",
      "name": "便签1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -400,
        -740
      ],
      "parameters": {
        "color": 7,
        "width": 700,
        "height": 580,
        "content": "## 1. 创建新的自定义 OpenAI 凭据"
      },
      "typeVersion": 1
    },
    {
      "id": "7703f756-652b-44e4-81b3-021323b08e18",
      "name": "便签",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        180,
        -380
      ],
      "parameters": {
        "color": 5,
        "width": 540,
        "height": 240,
        "content": "### 通过 N8N Webhooks 的 LLM 模型"
      },
      "typeVersion": 1
    },
    {
      "id": "a6bc3bcc-d1e9-4d7a-947b-faeddda59507",
      "name": "便签2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -400,
        -40
      ],
      "parameters": {
        "color": 7,
        "width": 740,
        "height": 420,
        "content": "## 2. 列出所有可用模型"
      },
      "typeVersion": 1
    },
    {
      "id": "54e0b20a-1a3d-4068-b76a-9b6d10fa0fc2",
      "name": "格式化完成响应",
      "type": "n8n-nodes-base.code",
      "position": [
        1320,
        340
      ],
      "parameters": {
        "mode": "runOnceForEachItem",
        "jsCode": "return {\n  \"id\": $json.id,\n  \"object\": \"chat.completion\",\n  \"created\": $json.created_at,\n  \"model\": $json.model,\n  \"choices\": $json.output.flatMap((item,idx) => (\n    item.content.map((content) => ({\n      index: idx,\n      finish_reason: \"stop\",\n      \"message\": {\n        \"annotations\": content.annotations,\n        \"content\": content.text,\n        \"refusal\": null,\n        \"role\": item.role\n      }\n    }))\n  )),\n  \"usage\": {\n    \"completion_tokens\": $json.usage.output_tokens,\n    \"completion_tokens_details\": $json.usage.output_tokens_details,\n    \"prompt_tokens\": $json.usage.input_tokens_details,\n    \"prompt_tokens_details\": $json.usage.input_tokens_details,\n    \"total_tokens\": $json.usage.total_tokens\n  },\n  \"service_tier\": $json.service_tier,\n  \"system_fingerprint\": $json.id\n}"
      },
      "typeVersion": 2
    },
    {
      "id": "a7f2daa8-b4be-4571-b210-3d7ffd7481a3",
      "name": "JSON 响应",
      "type": "n8n-nodes-base.respondToWebhook",
      "position": [
        1520,
        340
      ],
      "parameters": {
        "options": {},
        "respondWith": "json",
        "responseBody": "={{ $json }}"
      },
      "typeVersion": 1.2
    },
    {
      "id": "4d64850a-3125-47eb-a892-1beddbb371fb",
      "name": "文本响应",
      "type": "n8n-nodes-base.respondToWebhook",
      "position": [
        1520,
        140
      ],
      "parameters": {
        "options": {},
        "respondWith": "text",
        "responseBody": "={{ $json.data }}"
      },
      "typeVersion": 1.2
    },
    {
      "id": "a9352379-8001-4ff2-a76a-cd927e9f47a2",
      "name": "便签3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        380,
        -40
      ],
      "parameters": {
        "color": 7,
        "width": 1360,
        "height": 580,
        "content": "## 3. 为 Langchain 兼容性重新映射 OpenAI 响应 API"
      },
      "typeVersion": 1
    },
    {
      "id": "cd8859ef-9d74-4272-a580-d0db59ce1a43",
      "name": "格式化流响应",
      "type": "n8n-nodes-base.code",
      "position": [
        1320,
        140
      ],
      "parameters": {
        "mode": "runOnceForEachItem",
        "jsCode": "const items = $input.item.json.data.split(/^\\n/mg);\nconst events = items.map(item => {\n  const [event, data] = item.split('\\n');\n  return {\n    event: event?.split(':')[1]?.trim() ?? null,\n    data: data?.substring(data.indexOf(':')+1,data.length)?.trim() ?? null\n  }\n});\n\nconst done = events.find(item => item.event === 'response.completed');\nconst res = JSON.parse(done.data).response;\n\nconst chunk = {\n  id: res.id,\n  object:\"chat.completion.chunk\",\n  created: res.created_at,\n  model: res.model,\n  service_tier: res.service_tier,\n  system_fingerprint: res.id,\n  choices: [{\n    index: 0,\n     delta: { content: res.output[0].content[0].text }\n  }],\n  \"usage\": {\n    \"completion_tokens\": res.usage.output_tokens,\n    \"completion_tokens_details\": res.usage.output_tokens_details,\n    \"prompt_tokens\": res.usage.input_tokens_details,\n    \"prompt_tokens_details\": res.usage.input_tokens_details,\n    \"total_tokens\": res.usage.total_tokens\n  }\n};\n\nconst data = [\n  `data: ${JSON.stringify(chunk)}`,\n  `data: [DONE]`\n].join('\\n\\n');\n\nreturn { data };"
      },
      "typeVersion": 2
    },
    {
      "id": "e1cb299d-3301-41d9-aa99-9b740105f377",
      "name": "便签说明4",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -880,
        -740
      ],
      "parameters": {
        "width": 420,
        "height": 1180,
        "content": "## 试试看！"
      },
      "typeVersion": 1
    }
  ],
  "pinData": {},
  "connections": {
    "Webhook": {
      "main": [
        [
          {
            "node": "OpenAI Models",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Is Agent?": {
      "main": [
        [
          {
            "node": "Format Stream Response",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Format Completion Response",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "n8n Webhook": {
      "ai_languageModel": [
        [
          {
            "node": "AI Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Models": {
      "main": [
        [
          {
            "node": "Models Response",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Responses API": {
      "main": [
        [
          {
            "node": "Is Agent?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "POST ChatCompletions": {
      "main": [
        [
          {
            "node": "Remap to Response API Schema",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Format Stream Response": {
      "main": [
        [
          {
            "node": "Text Response",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Format Completion Response": {
      "main": [
        [
          {
            "node": "JSON Response",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "When chat message received": {
      "main": [
        [
          {
            "node": "AI Agent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Remap to Response API Schema": {
      "main": [
        [
          {
            "node": "OpenAI Responses API",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}
常见问题

如何使用这个工作流？

复制上方的 JSON 配置代码，在您的 n8n 实例中创建新工作流并选择「从 JSON 导入」，粘贴配置后根据需要修改凭证设置即可。

这个工作流适合什么场景？

高级 - 工程, 人工智能

需要付费吗？

本工作流完全免费，您可以直接导入使用。但请注意，工作流中使用的第三方服务（如 OpenAI API）可能需要您自行付费。

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工作流信息
难度等级
高级
节点数量19
分类2
节点类型9
难度说明

适合高级用户，包含 16+ 个节点的复杂工作流

作者
Jimleuk

Jimleuk

@jimleuk

Freelance consultant based in the UK specialising in AI-powered automations. I work with select clients tackling their most challenging projects. For business enquiries, send me an email at hello@jimle.uk LinkedIn: https://www.linkedin.com/in/jimleuk/ X/Twitter: https://x.com/jimle_uk

外部链接
在 n8n.io 查看 →

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