Zapier e-sign
---
title: Zapier e-sign
description: Start Zapier e-sign on Atlas REST: envelope lifecycle from draft through signed PDF without seat licenses. Includes five free sends on signup.
date: 2026-06-24
updated: 2026-06-24
---
Zapier e-sign workflows wire spreadsheets, forms, and CRM stages to Atlas REST signing without maintaining a server. Atlas has no native Zapier app. Use Webhooks by Zapier against POST /api/envelope and optional Code steps for HMAC verification.
Share: Zapier triggers create. Atlas review_url lets ops approve before email goes out.
When Zapier fits
Use Zapier when:
- Volume stays under a few hundred tasks per month
- Ops owns the workflow and can tolerate Zapier retry semantics
- You need a prototype before investing in middleware
Move to a hosted function or Vercel route when you need custom HMAC logic, complex party mapping, or webhook verification Zapier cannot express cleanly.
Pattern A: Form or sheet to envelope
Trigger: Google Forms / Airtable / Typeform new row → Webhooks by Zapier POST to Atlas /api/envelope → Formatter or Code step maps row → parties JSON → Slack or Gmail action sends review_url to internal owner → Human clicks Send on Atlas review → Optional second Zap on envelope.signed (see Pattern B)
Webhooks by Zapier create step
URL: https://atlaswork.ai/api/envelope
Headers:
| Header | Value |
|---|---|
| Authorization | Bearer YOUR_API_KEY |
| Content-Type | application/json |
| Idempotency-Key | zap-{{zap_meta_human_now}}-{{trigger_id}} |
Body (JSON):
{
"document_url": "{{pdf_url_from_row}}",
"webhook_url": "https://hooks.zapier.com/hooks/catch/XXXX/YYYY/",
"metadata": {
"client_reference_id": "zap-row-{{row_id}}",
"external_id": "{{row_id}}"
},
"parties": [
{
"email": "{{signer_email}}",
"name": "{{signer_name}}",
"role": "Customer"
}
]
}
Parse the response in a Formatter step. Store envelope_id and review_url back to the sheet.
Pattern B: Atlas webhook to Zapier catch hook
Register a Zapier Catch Hook as your Atlas webhook_url. Atlas POSTs lifecycle events with X-Atlas-Signature.
For production, verify signatures in a Code step:
const crypto = require('crypto');
const apiKey = inputData.atlas_api_key;
const sig = inputData.headers['x-atlas-signature'] || '';
const body = inputData.raw_body;
const expected = 'sha256=' + crypto.createHmac('sha256', apiKey).update(body).digest('hex');
if (sig !== expected) throw new Error('Invalid Atlas signature');
return JSON.parse(body);
Branch on event:
| Event | Zap action |
|---|---|
| envelope.signed | Update CRM stage, attach file link, notify Slack |
| envelope.declined | Reopen deal, email owner |
| envelope.voided | Clear pending flag on row |
AI agent + Zapier
Searchers ask about Zapier AI agent e-sign when they want ChatGPT or an AI step to decide who signs. Keep AI in the trigger layer only. Let the AI output structured JSON (email, name, document URL). Pass that JSON into the Webhooks create step. Do not let the agent call Send without human review on ad-hoc PDFs.
For agent-native signing inside Claude or ChatGPT, use Atlas MCP instead of Zapier. MCP covers status, void, and remind without chaining six Zaps.
Template repeat sends
Once legal trusts a template:
- Save template from a completed envelope in Atlas dashboard
- Replace create Zap with HTTP POST to
https://atlaswork.ai/api/templates/{id}/send - Map prefill keys from Zap fields
Template sends consume one credit at dispatch, same as manual send.
Error handling in Zap
| Atlas response | Meaning | Zap handling |
|---|---|---|
| 402 | No credits | Email admin, pause Zap |
| 409 | Fields still detecting | Delay step, retry GET status |
| 400 | Bad payload | Log row to error sheet |
Turn on Zapier error notifications until the flow is stable.
Cost math
Zapier bills per task. A minimal flow is trigger + create + update sheet + webhook handler = four tasks per contract. Compare that to Atlas envelope credits ($1 per send) when modeling ops budget.
Limitations
- Zapier cannot upload local PDF binaries easily. Prefer document_url on a signed CDN or Google Drive direct link your middleware resolves
- Multipart upload from Zapier is awkward. Use a small Cloud Function as a hop if files start in Drive without public URLs
- Sequential multi-party flows need careful party array ordering in JSON
Implementation depth for Zapier e-sign
Production signing integrations fail on edge cases, not happy-path demos. Always pass Idempotency-Key on POST /api/envelope. Retries from Zapier must not spawn duplicate envelopes.
Atlas defaults to review-first on ad-hoc creates. Your Zap uploads metadata; a human opens review_url, confirms fields, then clicks Send.
Set webhook_url at create. Verify X-Atlas-Signature HMAC with your API key before you mutate CRM state.
Integration wiring
Trigger create from your CRM stage change, form submit, or workflow node. Store envelope_id on the deal row for support traces.
Use Idempotency-Key derived from deal ID plus document hash so workflow retries stay safe.
Push signed PDF URL back to CRM on envelope.signed webhook after you verify HMAC.
API surface map
| Action | Atlas route |
|---|---|
| Create | POST /api/envelope |
| Read | GET /api/envelope/{id} |
| Send | POST /api/envelope/{id}/send |
| Template send | POST /api/templates/{id}/send |
OpenAPI: /openapi.json. MCP alternative: /mcp.
Pilot success metrics
Time from upload to first signed PDF on a test envelope. Webhook delivery latency p95 under load. Cost per signed document at peak volume.
Pick one metric and measure it this week on Atlas with five free sends at /signup.
FAQ
Is there an official Atlas Zapier app? Not today. Webhooks by Zapier is the supported path.
Can Zapier auto-send? Only if you call send endpoints after review, or use template send for trusted docs. Create alone does not email signers.
DOCX support? Yes on API create when your URL serves DOCX or you upload via a hop service.
MCP vs Zapier? MCP for in-chat agents. Zapier for no-code ops triggers.