BuchhaltungsButler is a cloud accounting automation platform widely used by SMEs and accounting firms in Germany and Austria. It focuses on receipt capture, automated booking and tax reporting.
Integrate Buchhaltungsbutler alongside dozens of other accounting and ERP systems through Maesn Unified API.
.avif)
Three API credentials, POST-only endpoints and all BuchhaltungsButler-specific implementation details are handled by Maesn. You work with the same unified REST interface as every other system.
BuchhaltungsButler does not offer webhooks natively. Maesn fills this gap with synthetic webhooks and a normalized payload for consistency with every other system.
Once BuchhaltungsButler is live, every other system Maesn supports is immediately accessible. No additional implementation needed.
Hero Software helps craft businesses digitize and automate their entire back-office — from quotes to invoicing. Over 40,000 tradespeople use their cloud-based platform to eliminate manual admin and run operations more efficiently.
“The support provided is truly first class, with impressively quick response times. The documentation is thorough and easy to follow, which made integration a smooth process for me. I also appreciate the wide range of accounting integrations and endpoints available. It's clear that the endpoints are continuously being developed and expanded, which adds even more value to the platform.”
Ricardas Kauneckas
Full Stack Engineer @ HERO Software
Unified. Certified. Production-ready.
BuchhaltungsButler's API is POST-only by design. Even read operations use POST requests. Maesn abstracts this behind a standard REST interface, so you work with the same GET/POST/PUT/DELETE pattern as every other system in your stack.
POST-only API abstracted to standard REST
No BuchhaltungsButler-specific request logic
Same interface as every other system
BuchhaltungsButler requires three separate values for authentication: API Client, API Secret and API Key. Maesn stores all three after onboarding and handles authentication automatically for every request.
API Client, Secret and Key stored after onboarding
Authentication handled automatically per tenant
No custom auth logic on your end
.avif)
.avif)
The Maesn docs cover every weclapp endpoint, authentication flow, and implementation detail — plus a full overview of the current coverage, which is continuously being expanded.
Full BuchhaltungsButler endpoint & authentication documentation
Current coverage overview at a glance
Continuously expanding endpoints & integrations
Get your product and brand name listed at Buchhaltungsbutler,
and benefit from co-marketing activities.
Get insights and learn about the most imoportant systems in our country-by-country view of the European ERP and Accounting software landscape.
.avif)
BuchhaltungsButler's API is POST-only by desig. Even read operations require POST requests. Maesn abstracts this behind a standard REST interface consistent with every other system.
BuchhaltungsButler requires API Client, API Secret and API Key for every request. Maesn stores all three after onboarding and handles authentication automatically per tenant.
Once Buchhaltungsbutler is live, every other system Maesn supports is immediately accessible.
We are European.
Built and hosted in Germany to meet the highest security and compliance standards, Maesn processes API calls in real time without storing customer data and is fully ISO 27001 & GDPR compliant.
Everything you need to know about BuchhaltungsButler.
You have more questions? We are looking forward hearing from you - book a meeting now!
BuchhaltungsButler is a cloud-based accounting automation platform widely used by SMBs and tax advisors in Germany, offering tools for automated bookkeeping, invoice processing and financial reporting.
Integrating via Maesn eliminates all BuchhaltungsButler-specific complexity. The POST-only API, three-credential authentication and webhook gaps are all handled automatically behind one unified REST interface. Plus, you immediately gain access to dozens of other accounting and ERP systems.
BuchhaltungsButler's API is POST-only by design — even data retrieval operations require POST requests instead of GET. Maesn abstracts this entirely behind a standard REST interface so you work with the same GET/POST/PUT/DELETE pattern as every other system in your stack.
BuchhaltungsButler requires three separate credentials for authentication: API Client, API Secret and API Key. Maesn stores all three after onboarding and handles authentication automatically for every request. No custom auth logic required on your end.
BuchhaltungsButler does not offer webhooks natively. Maesn fills this gap with synthetic webhooks covering every object and every event in a normalized payload consistent with every other system in your stack.
Maesn supports invoices, bills, credit notes, customers, suppliers, contacts, payments, journal entries, transactions and more. Coverage is continuously expanding and endpoints can be added on demand.
Maesn uses HTTPS and TLS for all data transfer and does not store any customer data. The platform is hosted on Microsoft Azure in Frankfurt, Germany and is fully GDPR & ISO 27001 compliant.
.webp)
