Make, n8n, and generic HTTP recipes

• Trigger any flow when a Zeng Book event fires —invoice paid, quotation accepted, project status changed, etc.
• Act on Zeng Book data on a schedule — pull overdue invoices, post a daily digest, archive old projects to Google Sheets.
• Bridge Zeng Book and tools without a direct integration — Slack, Notion, Airtable, HubSpot, Pipedrive.

1. Generate an API key in Settings → API keys. Store it in your automation tool's secret manager (Zapier "Secret", Make "Connection", n8n "Credential").
2. For event-triggered flows, register a webhook endpoint pointing at your automation tool's catch-hook URL. Copy the signing secret too if your tool can verify HMAC.
3. For pull-based flows, use the "HTTP" / "Webhooks by Zapier" module with Authorization: Bearer zb_live_....

A push (webhook-triggered) flow. Latency ~1 second.

1. In Zapier, create a new Zap with the trigger Webhooks by Zapier → Catch Hook. Copy the catch-hook URL.
2. In Zeng Book, go to Settings → Webhooks → Add endpoint, paste the URL, and tick invoice.paid.
3. Trigger a paid invoice in Zeng Book (mark one paid) so Zapier captures a sample.
4. Add the action Slack → Send Channel Message. Map the message to:
   text

   💰 Invoice {{data__object__number}} marked paid
   Project: {{data__object__title}}
   Total payments: {{data__object__payments}}

5. Turn on the Zap.

A pull (scheduled) flow. Useful when you want a daily summary rather than an event for each individual change.

1. In Make, create a new scenario. First module: Schedule → Every day at 08:00 SGT.
2. Add HTTP → Make a request:
   • URL: https://www.zengbook.com/api/v1/invoices?status=OVERDUE&limit=100
   • Headers: Authorization: Bearer zb_live_...
   • Parse response: JSON.
3. Iterate data with Flow Control → Iterator.
4. Aggregate to text or CSV with Tools → Text Aggregator.
5. Send via Email → Send an Email to your AR inbox, or post to a Slack channel.

1. Add a Webhook node. Set the HTTP Method to POST and copy the URL.
2. In Zeng Book, register the URL as a webhook endpoint subscribed to client.created.
3. (Optional) Add a Function node before the Google Sheets node that verifies the HMAC signature, using the snippet from verification. Drop the request if the signature is invalid.
4. Add a Google Sheets → Append Row node mapping data.object.name, data.object.email, etc.