Resources
Everything I use. All free.
No paid tools. No affiliate links. Just what works.
Core Tools
The full stack
| Tool | What it does | Used in | Cost | Link |
|---|---|---|---|---|
| n8n | Workflow automation engine | Every tutorial | Free (self-host) | n8n.io |
| WAHA | WhatsApp HTTP API | WhatsApp tutorials | Free tier | waha.devlike.pro |
| OpenRouter | AI model gateway (DeepSeek, GPT, Claude) | AI agent tutorials | Free credits | openrouter.ai |
| Docker | Container runtime for self-hosting | All tutorials | Free | docker.com |
| Google Sheets | Persistent bot memory layer | Memory tutorials | Free | sheets.google.com |
| Excalidraw | Architecture diagrams | All tutorials | Free | excalidraw.com |
Copy-Paste Expressions
n8n expression cheatsheet
WAHA Payload — Edit Fields node
// WAHA Webhook Payload event: {{ $json.body.event }} chatID: {{ $json.body.payload.from }} message: {{ $json.body.payload.body }} fromMe: {{ $json.body.payload.fromMe }} messageId: {{ $json.body.payload.id }}
Common Expressions
// Frequently Used Increment count: {{ $json.message_count + 1 }} Current timestamp: {{ $now }} Previous node ref: {{ $('Edit Fields').item.json.chatID }} AI reply output: {{ $json.output }}