Ai Agent With Charts Capabilities Using Openai Structured Output And Quickchart

About This Script

Features:

• Makes HTTP requests to external APIs

{
    "nodes": [
        {
            "id": "4b7c314a-d7c5-46cb-af6f-b3ff02a182b7",
            "name": "OpenAI Chat Model",
            "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
            "position": [
                980,
                600
            ],
            "parameters": {
                "model": "gpt-4o-mini-2024-07-18",
                "options": []
            },
            "credentials": {
                "openAiApi": {
                    "id": "WqzqjezKh8VtxdqA",
                    "name": "OpenAi account - Baptiste"
                }
            },
            "typeVersion": 1
        },
        {
            "id": "cf4ffa49-8830-4db2-9a7d-b8931e806947",
            "name": "Window Buffer Memory",
            "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
            "position": [
                1120,
                600
            ],
            "parameters": [],
            "typeVersion": 1.2
        },
        {
            "id": "22d36226-ca37-4ccc-a2d6-826b78c2f1f3",
            "name": "Generate a chart",
            "type": "@n8n/n8n-nodes-langchain.toolWorkflow",
            "position": [
                1260,
                600
            ],
            "parameters": {
                "name": "generate_a_chart",
                "schemaType": "manual",
                "workflowId": "={{ $workflow.id }}",
                "description": "Call this tool whenever you need to generate a chart.",
                "inputSchema": "{\n\"type\": \"object\",\n\"properties\": {\n\t\"query\": {\n\t\t\"type\": \"string\",\n\t\t\"description\": \"a query describing the chart to generate\"\n\t\t}\n\t}\n}",
                "specifyInputSchema": true
            },
            "typeVersion": 1.1
        },
        {
            "id": "d9ea85d7-3a56-4a95-88c8-60e5c95014e7",
            "name": "Execute \"Generate a chart\" tool",
            "type": "n8n-nodes-base.executeWorkflowTrigger",
            "position": [
                580,
                1100
            ],
            "parameters": [],
            "typeVersion": 1
        },
        {
            "id": "68d538f7-acce-447f-9ab1-6975639e05f7",
            "name": "OpenAI - Generate Chart definition with Structured Output",
            "type": "n8n-nodes-base.httpRequest",
            "position": [
                880,
                1100
            ],
            "parameters": {
                "url": "https://api.openai.com/v1/chat/completions",
                "method": "POST",
                "options": [],
                "jsonBody": "={\n    \"model\": \"gpt-4o-2024-08-06\",\n    \"messages\": [\n        {\n            \"role\": \"system\",\n            \"content\": \"Based on the user request, generate a valid Chart.js definition. Important: - Be careful with the data scale and beginatzero that all data are visible. Example if ploted data 2 and 3 on a bar chart, the baseline should be 0. - Charts colors should be different only if there are multiple datasets. - Output valid JSON. In scales, min and max are numbers. Example: `{scales:{yAxes:[{ticks:{min:0,max:3}`\"\n        },\n        {\n            \"role\": \"user\",\n            \"content\": \"{{ $json.query.query }}\"\n        }\n    ],\n    \"response_format\": {\n  \"type\": \"json_schema\",\n  \"json_schema\": {\n    \"name\": \"chart_configuration\",\n    \"description\": \"Configuration schema for Chart.js charts\",\n    \"strict\": true,\n    \"schema\": {\n  \"type\": \"object\",\n  \"properties\": {\n    \"type\": {\n      \"type\": \"string\",\n      \"enum\": [\"bar\", \"line\", \"radar\", \"pie\", \"doughnut\", \"polarArea\", \"bubble\", \"scatter\", \"area\"]\n    },\n    \"data\": {\n      \"type\": \"object\",\n      \"properties\": {\n        \"labels\": {\n          \"type\": \"array\",\n          \"items\": {\n            \"type\": \"string\"\n          }\n        },\n        \"datasets\": {\n          \"type\": \"array\",\n          \"items\": {\n            \"type\": \"object\",\n            \"properties\": {\n              \"label\": {\n                \"type\": [\"string\", \"null\"]\n              },\n              \"data\": {\n                \"type\": \"array\",\n                \"items\": {\n                  \"type\": \"number\"\n                }\n              },\n              \"backgroundColor\": {\n                \"type\": [\"array\", \"null\"],\n                \"items\": {\n                  \"type\": \"string\"\n                }\n              },\n              \"borderColor\": {\n                \"type\": [\"array\", \"null\"],\n                \"items\": {\n                  \"type\": \"string\"\n                }\n              },\n              \"borderWidth\": {\n                \"type\": [\"number\", \"null\"]\n              }\n            },\n            \"required\": [\"data\", \"label\", \"backgroundColor\", \"borderColor\", \"borderWidth\"],\n            \"additionalProperties\": false\n          }\n        }\n      },\n      \"required\": [\"labels\", \"datasets\"],\n      \"additionalProperties\": false\n    },\n    \"options\": {\n      \"type\": \"object\",\n      \"properties\": {\n        \"scales\": {\n          \"type\": [\"object\", \"null\"],\n          \"properties\": {\n            \"yAxes\": {\n              \"type\": \"array\",\n              \"items\": {\n                \"type\": [\"object\", \"null\"],\n                \"properties\": {\n                  \"ticks\": {\n                    \"type\": [\"object\", \"null\"],\n                    \"properties\": {\n                      \"max\": {\n                        \"type\": [\"number\", \"null\"]\n                      },\n                      \"min\": {\n                        \"type\": [\"number\", \"null\"]\n                      },\n                      \"stepSize\": {\n                        \"type\": [\"number\", \"null\"]\n                      },\n                      \"beginAtZero\": {\n                        \"type\": [\"boolean\", \"null\"]\n                      }\n                    },\n                    \"required\": [\"max\", \"min\", \"stepSize\", \"beginAtZero\"],\n                    \"additionalProperties\": false\n                  },\n                  \"stacked\": {\n                    \"type\": [\"boolean\", \"null\"]\n                  }\n                },\n                \"required\": [\"ticks\", \"stacked\"],\n                \"additionalProperties\": false\n              }},\n              \"xAxes\": {\n                \"type\": [\"object\", \"null\"],\n                \"properties\": {\n                  \"stacked\": {\n                    \"type\": [\"boolean\", \"null\"]\n                  }\n                },\n                \"required\": [\"stacked\"],\n                \"additionalProperties\": false\n              }\n          },\n          \"required\": [\"yAxes\", \"xAxes\"],\n          \"additionalProperties\": false\n        },\n        \"plugins\": {\n          \"type\": [\"object\", \"null\"],\n          \"properties\": {\n            \"title\": {\n              \"type\": [\"object\", \"null\"],\n              \"properties\": {\n                \"display\": {\n                  \"type\": [\"boolean\", \"null\"]\n                },\n                \"text\": {\n                  \"type\": [\"string\", \"null\"]\n                }\n              },\n              \"required\": [\"display\", \"text\"],\n              \"additionalProperties\": false\n            },\n            \"legend\": {\n              \"type\": [\"object\", \"null\"],\n              \"properties\": {\n                \"display\": {\n                  \"type\": [\"boolean\", \"null\"]\n                },\n                \"position\": {\n                  \"type\": [\"string\", \"null\"],\n                  \"enum\": [\"top\", \"left\", \"bottom\", \"right\", null]\n                }\n              },\n              \"required\": [\"display\", \"position\"],\n              \"additionalProperties\": false\n            }\n          },\n          \"required\": [\"title\", \"legend\"],\n          \"additionalProperties\": false\n        }\n      },\n      \"required\": [\"scales\", \"plugins\"],\n      \"additionalProperties\": false\n    }\n  },\n  \"required\": [\"type\", \"data\", \"options\"],\n  \"additionalProperties\": false\n}\n}\n}\n}",
                "sendBody": true,
                "sendHeaders": true,
                "specifyBody": "json",
                "authentication": "predefinedCredentialType",
                "headerParameters": {
                    "parameters": [
                        {
                            "name": "=Content-Type",
                            "value": "application/json"
                        }
                    ]
                },
                "nodeCredentialType": "openAiApi"
            },
            "credentials": {
                "openAiApi": {
                    "id": "WqzqjezKh8VtxdqA",
                    "name": "OpenAi account - Baptiste"
                }
            },
            "typeVersion": 4.2
        },
        {
            "id": "0fd4ad08-ad85-4d0b-b75f-0e59f789cbfd",
            "name": "Set response",
            "type": "n8n-nodes-base.set",
            "position": [
                1120,
                1100
            ],
            "parameters": {
                "options": [],
                "assignments": {
                    "assignments": [
                        {
                            "id": "37512e1a-8376-4ba0-bdcd-34bb9329ae4b",
                            "name": "response",
                            "type": "string",
                            "value": "={{ encodeURIComponent(\"https://quickchart.io/chart?width=200&c=\"+$json.choices[0].message.content) }}\n\n"
                        }
                    ]
                }
            },
            "typeVersion": 3.4
        },
        {
            "id": "6785cadb-4875-47ac-9b57-29b583c53937",
            "name": "Sticky Note1",
            "type": "n8n-nodes-base.stickyNote",
            "position": [
                20,
                260
            ],
            "parameters": {
                "color": "#FFF59D",
                "width": 680.7609104727082,
                "height": 619.3187860363884,
                "content": "Configuration note: update with your credentials or endpoint."
            },
            "typeVersion": 1
        },
        {
            "id": "fd507ff6-2d16-4498-ba2b-d91b02079311",
            "name": "Sticky Note",
            "type": "n8n-nodes-base.stickyNote",
            "position": [
                740,
                800
            ],
            "parameters": {
                "color": "#FFF59D",
                "width": 768.8586342909368,
                "height": 503,
                "content": "Configuration note: update with your credentials or endpoint."
            },
            "typeVersion": 1
        },
        {
            "id": "7f14532a-75ee-40f8-a45b-0f037af7cb05",
            "name": "Sticky Note2",
            "type": "n8n-nodes-base.stickyNote",
            "position": [
                740,
                260
            ],
            "parameters": {
                "color": "#FFF59D",
                "width": 768,
                "height": 485.8165429718969,
                "content": "Configuration note: update with your credentials or endpoint."
            },
            "typeVersion": 1
        },
        {
            "id": "7793a567-c4d4-4745-83c9-adf5397755e9",
            "name": "AI Agent",
            "type": "@n8n/n8n-nodes-langchain.agent",
            "position": [
                1020,
                400
            ],
            "parameters": {
                "options": {
                    "systemMessage": "You're a general purpose ai. Using markdown, you can display images in the conversation. Don't change the width of the chart"
                }
            },
            "typeVersion": 1.6
        },
        {
            "id": "71bd2cb5-7b20-4d83-adba-c1fd57511155",
            "name": "When chat message received",
            "type": "@n8n/n8n-nodes-langchain.chatTrigger",
            "position": [
                840,
                400
            ],
            "webhookId": "1281cd48-08a0-431d-9bf5-9bb60e6b7a77",
            "parameters": {
                "options": []
            },
            "typeVersion": 1.1
        }
    ],
    "connections": {
        "Generate a chart": {
            "ai_tool": [
                [
                    {
                        "node": "AI Agent",
                        "type": "ai_tool",
                        "index": 0
                    }
                ]
            ]
        },
        "OpenAI Chat Model": {
            "ai_languageModel": [
                [
                    {
                        "node": "AI Agent",
                        "type": "ai_languageModel",
                        "index": 0
                    }
                ]
            ]
        },
        "Window Buffer Memory": {
            "ai_memory": [
                [
                    {
                        "node": "AI Agent",
                        "type": "ai_memory",
                        "index": 0
                    }
                ]
            ]
        },
        "When chat message received": {
            "main": [
                [
                    {
                        "node": "AI Agent",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "Execute \"Generate a chart\" tool": {
            "main": [
                [
                    {
                        "node": "OpenAI - Generate Chart definition with Structured Output",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "OpenAI - Generate Chart definition with Structured Output": {
            "main": [
                [
                    {
                        "node": "Set response",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        }
    },
    "n8n_version": "1.5.0"
}

Requirements