Energyausweis API™
Legally compliant energy certificates in your software — without an in-house assessor team
For product, ops and agency leads: a full certificate product behind a REST API. You provide data and UX; certified GEG assessors issue, review and deliver the PDF plus § 87 listing disclosures.
Owners and agents ordering individual certificates use the online service — the API is the B2B product for platforms and integrations.
What the API delivers
Energyausweis API™ is not a document stub — it is a PaaS for consumption-, demand- and Smart certificates. Bearer auth, separate test and production, presigned uploads, structured JSON for status and mandatory fields — plus optional white-label. API usage is free for partners; issued certificates are billed.
From request to PDF
- 01Partner keyBearer tokens for test and production
- 02Create certificateChoose type, capture building data
- 03DocumentsUpload evidence via presigned URL
- 04IssuanceReview by GEG-qualified assessors
- 05PDF & JSONDownload plus listing mandatory fields
Value by audience
Property portals & listing platforms
Listings without complete § 87 disclosures risk warnings and fines. The API feeds certificate PDFs and structured metrics into your listing pipeline — at scale, without employing issuers in-house.
Estate-agent software & broker networks
CRMs and agent portals can embed certificates as a workflow step: order under your brand, attach to the property file, fewer hand-offs before publish. Practical guide to agent duties: GModG for estate agents →
Property-management software (SaaS / PropTech)
Certificates become a recurring platform feature — lease renewal, consumption data, modernisation recommendations. Make-or-buy and pilot building blocks: GModG for PM platforms →
Property managers & HOA management
Annual consumption data, HOA resolutions and liability interfaces need predictable procurement. API or list import instead of last-minute one-offs before the owners’ meeting: GModG for property managers →
PropTech CRM, valuation & digital services
Anyone valuing, marketing or digitally servicing properties needs reliable energy metrics in the data model — not a PDF bolted on later. The API closes the gap between property data and a legally valid certificate.
Marketing & digital agencies
Landing pages and lead funnels without certificate compliance lose ROAS and mandates. Energy certificates as a service card beside GDPR/BFSG — including embeds on client sites: GModG for marketing agencies →
Banks & lenders
Energy performance feeds risk and pricing. The API plugs certificates and metrics into application and collateral flows — without an in-house issuer team at the bank.
Technical deep dive
Architecture, OpenAPI and quick start live in the specialist article. The interactive Scalar console for trying calls is on the try-out page. Read the API article → Open API try-out →
How to start as an API partner
From first contact to your first calls in the test environment.
- Clarify product page and use case. Decide which audience and workflow (listing, CRM, PM, agency) you prioritise.
- Contact or partner conversation. Reach out via the contact form or partner programme — we align on volume, white-label and onboarding.
- Test credentials and try-out. With a Bearer token in the test environment, run first requests in Scalar or via cURL/fetch.
- Integration and go-live. Connect your pipeline, presigned uploads, status/PDF — then production key and per-certificate billing.
Frequently asked questions
- How does Energyausweis API™ differ from a form widget?
- You get the full certificate lifecycle via REST: capture, document upload, issuance by certified assessors, PDF and structured mandatory fields — including white-label and separate test/prod environments.
- Does API usage cost anything?
- API usage is free for partners. Issued energy certificates are billed at the agreed product price. The test environment is free to use.
- Where can I try endpoints interactively?
- At /api/try-out you get the Scalar UI with OpenAPI 3.1.2, code samples and try-it against the test environment. The machine-readable spec is at /api/spec.
- Who is the API for?
- Property portals, agent software and networks, property-management SaaS, property managers, PropTech CRM/digital services, marketing agencies, and banks/lenders — wherever certificates belong inside existing software.
- Is the API blog article still relevant?
- Yes. This product page explains usefulness by audience; the article “Energy certificate API for online portals” remains the technical and product deep dive.