Telegram AI Bot with OpenAI & LangChain

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 →

{
  "id": "U8EOTtZvmZPMYc6m",
  "meta": {
    "templateCredsSetupCompleted": true
  },
  "name": "Agentic Telegram AI bot with LangChain nodes and new tools",
  "tags": [],
  "nodes": [
    {
      "id": "13b3488e-af72-4d89-bef4-e9b895e3bf76",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        1640,
        580
      ],
      "parameters": {
        "model": "gpt-4o",
        "options": {
          "temperature": 0.7,
          "frequencyPenalty": 0.2
        }
      },
      "credentials": {
        "openAiApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "864937a1-43f6-4055-bdea-61ab07db9903",
      "name": "Window Buffer Memory",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "position": [
        1760,
        580
      ],
      "parameters": {
        "sessionKey": "=chat_with_{{ $('Listen for incoming events').first().json.message.chat.id }}",
        "contextWindowLength": 10
      },
      "typeVersion": 1
    },
    {
      "id": "4ef838d4-feaa-4bd3-b2c7-ccd938be4373",
      "name": "Listen for incoming events",
      "type": "n8n-nodes-base.telegramTrigger",
      "position": [
        1580,
        360
      ],
      "parameters": {
        "updates": [
          "*"
        ],
        "additionalFields": {}
      },
      "credentials": {
        "telegramApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "fed51c41-2846-4a1a-a5f5-ce121ee7fe88",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1460,
        180
      ],
      "parameters": {
        "color": 7,
        "width": 926.3188190787038,
        "height": 553.452795998601,
        "content": "## Generate an image with Dall-E-3 and send it via Telegram"
      },
      "typeVersion": 1
    },
    {
      "id": "1c7a204b-3ed7-47bd-a434-202b05272d18",
      "name": "Send final reply",
      "type": "n8n-nodes-base.telegram",
      "onError": "continueErrorOutput",
      "position": [
        2140,
        360
      ],
      "parameters": {
        "text": "={{ $json.output }}",
        "chatId": "={{ $('Listen for incoming events').first().json.message.from.id }}",
        "additionalFields": {
          "appendAttribution": false
        }
      },
      "credentials": {
        "telegramApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "bebbe9d4-47ba-4c13-9e1e-d36bfe6e472e",
      "name": "Send back an image",
      "type": "n8n-nodes-base.telegramTool",
      "position": [
        2020,
        580
      ],
      "parameters": {
        "file": "={{ $fromAI(\"url\", \"a valid url of an image\", \"string\", \" \") }}",
        "chatId": "={{ $('Listen for incoming events').first().json.message.from.id }}",
        "operation": "sendDocument",
        "additionalFields": {}
      },
      "credentials": {
        "telegramApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "38f2410d-bd55-4ddf-8aaa-4e28919de78f",
      "name": "Generate image in Dalle",
      "type": "@n8n/n8n-nodes-langchain.toolHttpRequest",
      "position": [
        1880,
        580
      ],
      "parameters": {
        "url": "https://api.openai.com/v1/images/generations",
        "method": "POST",
        "sendBody": true,
        "authentication": "predefinedCredentialType",
        "parametersBody": {
          "values": [
            {
              "name": "model",
              "value": "dall-e-3",
              "valueProvider": "fieldValue"
            },
            {
              "name": "prompt"
            }
          ]
        },
        "toolDescription": "Call this tool to request a Dall-E-3 model, when the user asks to draw something. If you g\u0435t a response from this tool, forward it to the Telegram tool.",
        "nodeCredentialType": "openAiApi"
      },
      "credentials": {
        "openAiApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "34265eab-9f37-475a-a2ae-a6c37c69c595",
      "name": "AI Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        1780,
        360
      ],
      "parameters": {
        "text": "={{ $json.message.text }}",
        "options": {
          "systemMessage": "=You are a helpful assistant. You are communicating with a user named {{ $json.message.from.first_name }}. Address the user by name every time. If the user asks for an image, always send the link to the image in the final reply."
        },
        "promptType": "define"
      },
      "typeVersion": 1.7
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "b36989c5-295a-4df6-84e9-776815509bc9",
  "connections": {
    "AI Agent": {
      "main": [
        [
          {
            "node": "Send final reply",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "AI Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Send back an image": {
      "ai_tool": [
        [
          {
            "node": "AI Agent",
            "type": "ai_tool",
            "index": 0
          }
        ]
      ]
    },
    "Window Buffer Memory": {
      "ai_memory": [
        [
          {
            "node": "AI Agent",
            "type": "ai_memory",
            "index": 0
          }
        ]
      ]
    },
    "Generate image in Dalle": {
      "ai_tool": [
        [
          {
            "node": "AI Agent",
            "type": "ai_tool",
            "index": 0
          }
        ]
      ]
    },
    "Listen for incoming events": {
      "main": [
        [
          {
            "node": "AI Agent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

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.

• openAiApi
• telegramApi

About this workflow

Agentic Telegram AI bot with LangChain nodes and new tools. Uses lmChatOpenAi, memoryBufferWindow, telegramTrigger, stickyNote. Event-driven trigger; 8 nodes.

Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →

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