MCP Tool Testing Log

March 26, 2026 · View on GitHub

Generated: 2025-10-20

Purpose: Document actual tool responses for skill content creation

This log contains real responses from n8n-mcp tools to inform accurate skill content.

n8n API Status

Health Check Result:

{
  "status": "ok",
  "apiUrl": "https://n8n-test.n8n-mcp.com",
  "mcpVersion": "2.20.3",
  "versionCheck": "up to date",
  "responseTime": 798ms
}

✅ n8n API Tools Available: All workflow creation/management tools functional

Database Statistics

{
  "totalNodes": 537,
  "totalTemplates": 2653,
  "statistics": {
    "aiTools": 270,
    "triggers": 108,
    "versionedNodes": 141,
    "nodesWithDocumentation": 470,
    "documentationCoverage": "88%"
  },
  "packageBreakdown": [
    {"package": "@n8n/n8n-nodes-langchain", "nodeCount": 100},
    {"package": "n8n-nodes-base", "nodeCount": 437}
  ]
}

Key Insights:

537 nodes total (437 base + 100 langchain)
270 AI-capable tools
108 trigger nodes
88% documentation coverage
2,653 templates with avg 4,115 views

Search Tool Testing

search_nodes - Common Queries

Query: "webhook" → Returns Webhook (trigger), Respond to Webhook (transform)

nodeType format: nodes-base.webhook
workflowNodeType format: n8n-nodes-base.webhook
⚠️ Critical: Use different formats for different tools!

Query: "http" → Returns HTTP Request, HTTP Request Tool (AI), Code Tool

Regular: nodes-base.httpRequest
AI Tool: nodes-langchain.toolHttpRequest

Query: "database" → Returns Firebase, Redis Vector Store, etc.

Node Essentials Testing

Webhook Node

Key Properties:

httpMethod: GET, POST, PUT, DELETE, etc. (default: GET)
path: Webhook URL path (e.g., "form-submit")
responseMode: onReceived, lastNode, responseNode
CRITICAL: Webhook data structure is $json.body.* not $json.*

Output Structure:

{
  "headers": {...},
  "params": {...},
  "query": {...},
  "body": {  // ⚠️ User data is HERE!
    "name": "John",
    "email": "john@example.com"
  }
}