# API and developers

> REST API for electronic signatures: start requests, fill templates, check status. Included from the Pro plan, hosted in Germany.

Source: https://smartdocs.de/en/developers/

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Integrate legally binding signatures into your CRM, ERP or in-house software. The REST API is included from the Pro plan, with no separate API plan and no Enterprise gate. The full API reference with all endpoints and examples is at [docs.smartdocs.de](https://docs.smartdocs.de).

## Features

- API keys with role and expiry: create keys in the dashboard, restrict 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, check status.
- Templates via API: fill and send templates programmatically, ideal for onboarding flows, shops and portals with high contract volume.
- Audit data included: hash chain, timestamps and completion certificate can be retrieved and archived through the API.

## 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 |

No separate API plan and no surcharge: the REST API is included in the Pro and Enterprise plans. You create API keys directly in your account, and you can request integration advice via the [contact form](/en/contact/).