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REST API · /api/v1/

The e-signature API developers actually want.

API key on signup. First signature in under an hour. No enterprise plan required.

API on every planSandbox = productionEU-hosted
POST/v1/envelopes
curl -X POST https://api.doc-e-sign.com/v1/envelopes \
-H "Authorization: Bearer $DOC_E_SIGN_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"document_base64": "...",
"signers": [{ "email": "[email protected]", "name": "Alice" }]
}'
201 Created · envelope sent, webhook armed

What you get.

REST API versioned at /api/v1/
API key available immediately on signup — no sales call, no demo request
Free tier: 10 envelopes/month, API included — test in production at zero cost
Pro: $19/month flat — not per-API-call, not per-seat

Developer DX priorities.

Sandbox mirrors production exactly
No separate environment surprises.
Webhooks fire the moment signing completes
No polling loop to write.
Every signed PDF contains a SHA-256 audit trail
Verifiable by your users offline.

What competitors charge for API access.

FeatureDocuSignYouSignDropbox SignDoc E Sign
API entry price$45+/user/month
Business Pro required
€104/monthHigher tiers only$0/mo free tier
or $19/mo flat

First signature in under an hour.

API key on signup. No sales call, no demo request, no enterprise plan.