Generate PDFs from Zapier

1. Send the values, get a document

Add a Webhooks by Zapier → Custom Request (POST) step and point it at your template's fill endpoint. Use your workspace's automation key — one key for everything, from your dashboard — rather than a per-template key, so you only paste a credential once however many automations you build.

Need the template id? GET /api/v1/templates lists them all by name with the same key, and GET /api/v1/me confirms the key works before you build anything on it.

Body — your field names, under `data`:

{
  "data": {
    "customer_name": "Sarah Whitfield",
    "invoice_ref": "INV-0042",
    "amount_due": "1350.00"
  },
  "params": { "order_id": "A-1029" }
}

The completed PDF comes back in the response. Add "preview": true while you are building the automation — the first 100 of those each month do not count against your documents.

2. Or have it delivered to you

Add a Webhooks by Zapier → Catch Hook step, copy the URL it gives you, and paste it into your template's webhook settings. Every completed document then arrives there on its own — with retries if Zapier is briefly unreachable, which the synchronous call above cannot give you.

The delivery is signed, so you can prove it came from us: how to verify the signature.

Worth knowing about Zapier

• →Choose Custom Request rather than POST so you can set the X-Api-Key header — the plain POST action sends the body but not your own headers.
• →Set the payload type to JSON and put your field values under a data object.
• →Zapier steps time out, so for anything slow prefer the webhook: send the fill, let it return immediately, and catch the finished document in a second Zap.