{ "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": { "name": "" } }, "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": { "name": "" } }, "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": 7, "width": 680.7609104727082, "height": 619.3187860363884, "content": "## Workflow: AI Agent with charts capabilities using OpenAI Structured Output\n\n**Overview**\n- This workflow is a experiment to integrate charts into an AI Agent\n- The AI Agent has normal AI conversation and can invoke a tool to integrate a graph in the conversation.\n- It uses OpenAI Structured Output to generate a chart definition according to Quickchart specifications.\n\n\n**How it works**\n- Activate the workflow\n- Start chatting with the AI Agent.\n- When the AI Agent detects that the user needs a chat, it calls the tool\n- The tool calls the sub-workflow with a query.\n- The sub-workflow calls the HTTP Request node (calling OpenAI) to retrieve a chart definition\n- In the \"set response\" node, he chat definition is added at the end of a quickchart.io url - the URL to the chart image. It is sent back to the AI Agent.\n- The AI Agent uses this image in its response.\n- For example, you can ask the AI Agent to generate a chart about the top 5 movies at the box office\n\n\n**Notes**\n- The full Quickchart.io specifications have not been integrated, thus there are some possible glitches (e.g due to the size of the graph, radar graphs are not displayed properly)\n- This could be provided to any automation, not only AI Agents." }, "typeVersion": 1 }, { "id": "fd507ff6-2d16-4498-ba2b-d91b02079311", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [ 740, 800 ], "parameters": { "color": 7, "width": 768.8586342909368, "height": 503, "content": "## Generate a Quickchart definition\n\n**HTTP Request node**\n- Send the chart query to OpenAI, with a defined JSON response format - *using HTTP Request node as it has not yet been implemented in the OpenAI nodes*\n- The JSON structure is based on ChartJS and Quickchart.io definitions, that let us create nice looking graphs.\n- The output is a JSON containing the chart definition that is passed to the next node.\n\n**Set Response node**\n- Adds the chart definition at the end of a Quickchart.io URL ([see documentation](https://quickchart.io/documentation/usage/parameters/))\n- Note that in the parameters, we specify the width to 250 in order to be properly displayed in the chart interface." }, "typeVersion": 1 }, { "id": "7f14532a-75ee-40f8-a45b-0f037af7cb05", "name": "Sticky Note2", "type": "n8n-nodes-base.stickyNote", "position": [ 740, 260 ], "parameters": { "color": 7, "width": 768, "height": 485.8165429718969, "content": "### Chat Agent\n- This is agent is mostly here to demonstrate how to use the sub workflow.\n- This is a basic agent with a tool \"generate a chart\"\n- The tool calls the sub-workflow\n- The sub-workflow responds with the Quickchart URL that is displayed in the conversation" }, "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 ], "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 } ] ] } } }