Versions
Skribble's Sign API has three versions. v2 is the current stable version recommended for all production integrations. v3 is available as a preview — try it in non-production environments and share your feedback.
For how Skribble versions its APIs in general — what counts as a breaking vs. additive change, and how long previous versions are supported — see Versioning.
API v1 End of Support
Sign API v1 reached end of support on 30 November 2025. After this date, v1 remains functional but breaking changes may be introduced without notice. If you are still on v1, upgrade to v2.
At a Glance
| Sign API v2 | Sign API v3 | |
|---|---|---|
| Released | 25 June 2024 | Preview |
| Single-document requests | ✅ | ✅ |
| Multi-document requests (up to 50) | ❌ | ✅ |
| Draft signature requests | ❌ | ✅ |
| Signer groups | ❌ | ✅ |
| Observer groups | ❌ | ✅ |
| SES / AES / QES signature qualities | ✅ | ✅ |
| Express QES (xQES) | ✅ | ✅ |
| ZertES and eIDAS compliance | ✅ | ✅ |
| Signature reminders | ✅ | ✅ |
| Attachments | ✅ | ✅ |
What's New in v3
Multi-Document Requests
A single signature request can contain up to 50 documents. All documents are signed together in one flow, which reduces friction for complex processes that would otherwise require multiple separate requests.
Draft Workflow
Signature requests can be created in DRAFT status and fully configured before being initiated. This lets you assemble documents, add signers, and set options across multiple API calls before committing — no more needing to get everything right in a single create call.
Express QES (xQES)
Both v2 and v3 support Express QES — a streamlined qualified electronic signature flow with identification-related endpoints that allow signers to complete the QES process without leaving your application.
Signer and Observer Groups
v3 introduces groups for both signers and observers:
- Signer groups — define parallel or sequential signing workflows. Signers in the same group can sign in any order; groups are completed sequentially.
- Observer groups — grant stakeholders read-only access to the request and its documents without being part of the signing flow.
Base URLs
Skribble hosts data in two regions. Choose the region that matches your data residency requirements and use it consistently across all API calls.
| Region | Sign API v2 | Sign API v3 |
|---|---|---|
| Switzerland (CH) | https://api.skribble.com/v2 | https://api.skribble.com/v3 |
| Germany (DE) | https://api.skribble.de/v2 | https://api.skribble.de/v3 |
Migrating from v2 to v3
v3 is not a drop-in replacement for v2 — the signing flow has an extra step and several field shapes have changed.