The full power of Penneo’s platform, directly in your solution.
Send documents for signature, collect verified data, automate document workflows, and retrieve signed files via our API. Built for developers. Trusted by regulated businesses across Europe.
Penneo enables faster integration, reduced development time, and lower maintenance costs.
Get started today
99.99% uptime
eIDAS · QTSP certified
REST API
Trusted by 3,500+ companies – including leading audit, accounting, and financial platforms.
We developed the APIs we’d want to use ourselves.
With Penneo’s API you can:
No patching systems together. Everything handled in one flow.
From request to result – fully automated.
1
Start the workflow
Initiate signing or data collection with a single API request.
2
Stay in sync
Receive real-time updates via webhooks at every event – no polling, no manual checks.
3
Retrieve the result
React to the events and trigger retrieval of case file details, signed documents, and verified data via the API – ready for your systems to consume.
Under the hood
Read the documentation
Endpoints, authentication, examples, and guides. Everything your team needs.
Open the docsBuilt for real-world complexity
One request, one case.
Send an entire casefile with multiple documents and signers with a single API request. No multi-step orchestration.
Collect, verify, deliver.
Trigger forms, file uploads, and eID verification automatically. Verified data flows directly back into your systems.
RESTful & predictable.
A clean, RESTful API with consistent patterns. No surprises.
Built to build with.
Sandbox environment and thorough documentation. Everything you need to go from zero to live with confidence.
Real-time visibility.
Leverage webhooks to keep your systems in sync at every step of the process.
Expert support.
Our team is here to help you plan your integration, get started, and go all the way.
Everything Penneo can do, your integration can do too.
You’re not working around limitations. You’re building directly on top of the same infrastructure trusted by thousands of regulated businesses.
No shortcuts.
No compromises.
No rebuilding compliance yourself.
Built on a compliance foundation
When you build on Penneo, compliance isn’t something you add later – it’s built in from the start.
QTSP certified
Highest EU trust level, recognised across all member states.
QES enforcement via API
Define signature level per signer – built into your logic.
Tamper-proof audit trail
Every action recorded, always verifiable.
ISO 27001 & 27701
Enterprise-grade security and privacy.
Always up to date
Our compliance team tracks regulatory changes for you.
Powering critical workflows across industries.
From accounting software to financial platforms to enterprise tools, companies rely on the Penneo API for:
- Handling document signing at scale
- Collecting and verifying sensitive data
- Ensuring compliance without slowing down operations
“
Usually you spend most of the time figuring out an API – not with Penneo. Here you could just get started building the actual functionality. That’s the difference between an API that’s been published and one that’s actually meantto be used.
CV
Charlie Vo
Developer at Tripletex
Try the API
Sign up for a free sandbox account. No commitment. Get full access to test your integration before going live.
Get accessTalk to our team
Already building something specific? Talk to our team – we’ll make sure you get the most out of the API.
Book a call