Query n8n Credentials with AI SQL Agent

{"meta": {"instanceId": "26ba763460b97c249b82942b23b6384876dfeb9327513332e743c5f6219c2b8e"}, "nodes": [{"id": "382dddd4-da50-49fa-90a2-f7d6d160afdf", "name": "When clicking \"Test workflow\"", "type": "n8n-nodes-base.manualTrigger", "position": [920, 280], "parameters": {}, "typeVersion": 1}, {"id": "efa8f415-62f7-43b3-a76a-a2eabf779cb8", "name": "Map Workflows & Credentials", "type": "n8n-nodes-base.set", "position": [1360, 280], "parameters": {"options": {}, "assignments": {"assignments": [{"id": "0fd19a68-c561-4cc2-94d6-39848977e6d2", "name": "workflow_id", "type": "string", "value": "={{ $json.id }}"}, {"id": "a81f9e6f-9c78-4c3d-9b79-e820f8c5ba29", "name": "workflow_name", "type": "string", "value": "={{ $json.name }}"}, {"id": "58ab0f2f-7598-48de-bea1-f3373c5731fe", "name": "credentials", "type": "array", "value": "={{ $json.nodes.map(node => node.credentials).compact().reduce((acc,cred) => { const keys = Object.keys(cred); const items = keys.map(key => ({ type: key, ...cred[key] })); acc.push(...items); return acc; }, []) }}"}]}}, "typeVersion": 3.3}, {"id": "9e9b4f9c-12b7-47ba-8cf4-a9818902a538", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [1084, 252], "parameters": {"width": 216, "height": 299.56273929030715, "content": "\n\n\n\n\n\n\n\n\n\n\n\n\n\n### \ud83d\udea8Required\nYou'll need an n8n API key. Note: available workflows will be scoped to your key."}, "typeVersion": 1}, {"id": "cf04eff5-12b2-42fb-9089-2d0c992af1b8", "name": "Save to Database", "type": "n8n-nodes-base.code", "position": [1540, 280], "parameters": {"language": "python", "pythonCode": "import json\nimport sqlite3\ncon = sqlite3.connect(\"n8n_workflow_credentials.db\")\n\ncur = con.cursor()\ncur.execute(\"CREATE TABLE IF NOT EXISTS n8n_workflow_credentials (workflow_id TEXT PRIMARY KEY, workflow_name TEXT, credentials TEXT);\")\n\nfor item in _input.all():\n cur.execute('INSERT OR REPLACE INTO n8n_workflow_credentials VALUES(?,?,?)', (\n item.json.workflow_id,\n item.json.workflow_name,\n json.dumps(item.json.credentials.to_py())\n ))\n\ncon.commit()\ncon.close()\n\nreturn [{ \"affected_rows\": len(_input.all()) }]"}, "typeVersion": 2}, {"id": "7e32cf83-0498-4666-8677-7fd32eec779c", "name": "Chat Trigger", "type": "@n8n/n8n-nodes-langchain.chatTrigger", "position": [1880, 280], "webhookId": "993ce267-a1e5-4657-a38c-08f86715063d", "parameters": {}, "typeVersion": 1}, {"id": "8c37f2ae-192b-4f98-a6fa-5aabf870e9e0", "name": "Query Workflow Credentials Database", "type": "@n8n/n8n-nodes-langchain.toolCode", "position": [2320, 440], "parameters": {"name": "query_workflow_credentials_database", "language": "python", "pythonCode": "import json\nimport sqlite3\ncon = sqlite3.connect(\"n8n_workflow_credentials.db\")\n\ncur = con.cursor()\nres = cur.execute(query);\n\noutput = json.dumps(res.fetchall())\n\ncon.close()\nreturn output;", "description": "Call this tool to query the workflow credentials database. The database is already set. The available tables are as follows:\n* n8n_workflow_credentials (workflow_id TEXT PRIMARY KEY, workflow_name TEXT, credentials TEXT);\n * n8n_workflow_credentials.credentials are stored as json string and the app name may be obscured. Prefer querying using the %LIKE% operation for best results.\n\nPass a SQL SELECT query to this tool for the available tables."}, "typeVersion": 1.1}, {"id": "60b2ab16-dc7c-4cb8-a58f-696f721b8d6f", "name": "OpenAI Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [2060, 440], "parameters": {"options": {}}, "credentials": {"openAiApi": {"id": "", "name": "[Your openAiApi]"}}, "typeVersion": 1}, {"id": "adf576c1-ddb0-4fef-980c-5b485a3204f2", "name": "Window Buffer Memory", "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow", "position": [2180, 440], "parameters": {}, "typeVersion": 1.2}, {"id": "4335b038-3e9f-4173-986d-cabdb87cc0b4", "name": "Sticky Note1", "type": "n8n-nodes-base.stickyNote", "position": [860, 100], "parameters": {"color": 7, "width": 930.8402221561373, "height": 488.8805508857059, "content": "## Step 1. Store Workflows Credential Mappings to Database\n\nWe'll achieve this by querying n8n's built-in API to query all workflows, extract the credentials list from the nodes within and then store them in a SQLite database. Don't worry, the actual credential data won't be exposed! For the database, we'll abuse the fact that the code node is able to create Sqlite databases - however, this is created in memory and will be wiped if the n8n instance is restarted."}, "typeVersion": 1}, {"id": "c1f557ee-1176-4f3e-8431-d162f1a59990", "name": "Sticky Note2", "type": "n8n-nodes-base.stickyNote", "position": [1820, 100], "parameters": {"color": 7, "width": 688.6507290693205, "height": 527.3794193342486, "content": "## Step 2. Use Agent as Search Interface\n\nInstead of building a form interface like a regular person, we'll just use an AI tools agent who is given aaccess to perform queries on our database. You can ask it things like \"which workflows are using slack + airtable + googlesheets?\""}, "typeVersion": 1}, {"id": "9bdc3fa9-d4a0-4040-bb32-6c76aaca3ad9", "name": "Workflow Credentials Helper Agent", "type": "@n8n/n8n-nodes-langchain.agent", "position": [2080, 280], "parameters": {"options": {"systemMessage": "=You help find information on n8n workflow credentials. When user mentions an app, assume they mean the workflow credential for the app.\n* Only if the user requests to provide a link to the workflow, replace $workflow_id with the workflow id in the following url schema: {{ window.location.protocol + '//' + window.location.host }}/workflow/$workflow_id"}}, "typeVersion": 1.6}, {"id": "ff39f504-9953-47c9-81eb-3146dfd6c8c5", "name": "Sticky Note4", "type": "n8n-nodes-base.stickyNote", "position": [420, 100], "parameters": {"width": 415.13049730628427, "height": 347.7398931123371, "content": "## Try It Out!\n\n### This workflow let's you query workflow credentials using an AI SQL agent. Example use-case could be:\n* \"Which workflows are using Slack and Google Calendar?\"\n* \"Which workflows have AI in their name but are not using openAI?\"\n\n### Run the Steps separately!\n* Step 1 populates a local database\n* Step 2 engages with the chatbot"}, "typeVersion": 1}, {"id": "3db2116c-abde-4856-bd1e-a15e0275477f", "name": "n8n", "type": "n8n-nodes-base.n8n", "position": [1140, 280], "parameters": {"filters": {}, "requestOptions": {}}, "credentials": {"n8nApi": {"id": "", "name": "[Your n8nApi]"}}, "typeVersion": 1}], "pinData": {}, "connections": {"n8n": {"main": [[{"node": "Map Workflows & Credentials", "type": "main", "index": 0}]]}, "Chat Trigger": {"main": [[{"node": "Workflow Credentials Helper Agent", "type": "main", "index": 0}]]}, "OpenAI Chat Model": {"ai_languageModel": [[{"node": "Workflow Credentials Helper Agent", "type": "ai_languageModel", "index": 0}]]}, "Window Buffer Memory": {"ai_memory": [[{"node": "Workflow Credentials Helper Agent", "type": "ai_memory", "index": 0}]]}, "Map Workflows & Credentials": {"main": [[{"node": "Save to Database", "type": "main", "index": 0}]]}, "When clicking \"Test workflow\"": {"main": [[{"node": "n8n", "type": "main", "index": 0}]]}, "Query Workflow Credentials Database": {"ai_tool": [[{"node": "Workflow Credentials Helper Agent", "type": "ai_tool", "index": 0}]]}}}