Where can I find the API documentation?

The complete reference with all endpoints and examples is at docs.smartdocs.de. It is publicly available, so you can plan your integration before you create an account.

How do I authenticate against the API?

With API keys that you create in the dashboard and can revoke at any time. Each key belongs to an organization, gets a role that limits its permissions (on the Enterprise plan, this can also be a custom role) and can optionally be given an expiration date.

Can I run signature requests entirely through the API?

Yes. Upload a document, place fields, define signers and signing order, start the request and query the status: everything the interface can do, the API can do too.

API and developers

The e-signature API for your application

Integrate legally binding signatures into your CRM, ERP or in-house software. The REST API is included from the Pro plan: no separate API plan, no Enterprise gate.

View API documentation Start for free

smartdocs-api

$ curl -X POST \
  api.smartdocs.de/v1/processes \
  -H "Authorization: Bearer sdk_…" \
  -d '{
    "template": "tpl_employment",
    "signers": [{
      "email": "m.weber@example.com",
      "level": "FES"
    }]
  }'

HTTP/2 201 Created
{
  "id": "proc_8f3k2m",
  "status": "SENT",
  "audit_trail": "sha256:c41e…"
}

Capabilities

Everything the app can do, the API can do

API keys with role and expiry

Create keys in the dashboard, limit them with a role, optionally let them expire and revoke them at any time. Each key belongs to exactly one organization.

Requests end to end

Upload documents, place fields, define signers and signing order, query status: the complete platform via REST.

Templates via API

Fill and send templates programmatically: ideal for onboarding flows, shops and portals with high contract volume.

Audit data included

The hash chain, timestamps and completion certificate are available via the API and can be archived in your own systems.

Availability

API access by plan

No separate API plan, no surcharge: the REST API is included in the Pro and Enterprise plans.

API access by plan
Plan	API access	Price
Free	Not included	€0
Pro	REST API included	€25 per seat per month
Enterprise	REST API included	€40 per seat per month

Create your account Request integration advice

FAQ

Questions about the API

Pro or higher. The REST API is included in the Pro and Enterprise plans, with no separate API plan and no surcharge.

From zero to signed in one afternoon

Create an account, generate an API key, start your first signature request with curl: that's all a proof of concept takes.

Start for free API documentation