Ship 30+ accounting integrations without the complexity.
One unified API for every ERP and accounting system your customers use. Maesn handles authentication, pagination, webhooks, data normalization and much more.
Your team ships the integration, not the plumbing.
Clear docs, real sandboxes, fast integrations: How Hero Software builds with Maesn
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
Why product teams
choose Maesn
Build One Integration.
Connect Dozens of Systems.
Stop building and maintaining endless integrations. With Maesn, you integrate once and enable dozens of systems through a single, unified API.
Fast, predictable and scalable.
Developer-centric documentation
No guesswork, no reverse-engineering.
Maesn provides clear, English-only, developer-first documentation that helps you to understand APIs instantly and ship integrations with confidence.
Free sandboxes
Build, test, and validate integrations without touching production systems. Our free sandboxes and dev environments let your team experiment safely and move faster from prototype to release.
One Common Data Model
Across All Systems
Forget system-specific schemas and edge cases. Maesn abstracts underlying complexity into a consistent data model, so your product logic stays clean - no matter which system sits behind it.
No system-specific complexity
Maesn removes any system-specific integration approaches. Everything is standardized, well-defined and future-proof. Stop wasting weeks understanding legacy systems and start shipping product.
Ready to ship your first integration?
Talk to the Maesn team and go live with your integration portfolio in days.
We are European.
Enterprise-grade security & compliance are our foundation.
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.
Frequently asked
questions
You have more questions? We are looking forward hearing from you - book a meeting now!
Why use Maesn instead of building multiple integrations?
With Maesn, product teams build one integration instead of maintaining dozens of system-specific APIs.
Do I still have to deal with different data formats?
No. Maesn abstracts legacy formats like CSV, ASCII, XML, or SOAP into a modern, unified REST API.
Does Maesn provide sandbox environments?
Yes. Maesn provides sandbox environments for all supported systems to develop and test integrations safely.
Is the API documentation available in English?
Yes. All Maesn API documentation is standardized and fully available in English (https://docs.maesn.com).
Is authentication consistent across all systems?
Yes. Maesn uses the same authentication mechanism across all integrations.
Do I need to manage access tokens myself?
Yes. Maesn provides unified webhooks across all systems, eliminating the need for polling.
Does Maesn support webhooks?
Yes. Maesn provides unified webhooks across all systems, eliminating the need for polling.
Are webhook payloads standardized?
Yes. Webhook events follow the same unified data model across all integrations.
Does Maesn support asynchronous API calls?
Yes. Asynchronous API calls are supported and unified across systems.
Does the API support filtering, ordering, and pagination?
Yes. All endpoints support standardized filtering, ordering, and pagination (https://docs.maesn.com/pagination).
What if an ERP system is heavily customized?
Most customizations can be handled through mapping logic or free-text fields within your integration setup. For custom endpoints or objects, Maesn supports passthrough access to system-specific endpoints and raw data when needed (https://docs.maesn.com/pass-through)
Can I mix unified and raw data access?
Yes. Product teams can combine normalized endpoints with system-specific raw data.
How does Maesn handle API changes in underlying systems?
Maesn is technology partner with the systems we connect to. We monitor and adapt to API changes so your product integration remains stable.
Does Maesn reduce long-term maintenance effort?
Yes. By standardizing APIs and handling changes centrally, Maesn significantly reduces maintenance overhead.
How does Maesn improve developer productivity?
Maesn removes repetitive integration work, allowing product teams to focus on core product features.