Snelstart is a Dutch accounting software widely used by freelancers, SMEs and accounting offices across the Netherlands. The platform supports core bookkeeping processes such as invoicing, VAT handling, bank reconciliatio, and financial reporting.
Integrate SnelStart alongside dozens of other accounting and ERP systems through Maesn Unified API.
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SnelStart's system-specific data model, authentication flow and response structures are fully abstracted by Maesn. Your team builds against one clean unified REST interface.
SnelStart's API documentation is exclusively in Dutch and requires prior registration to access. Maesn's documentation is fully in English and accessible immediately - consistent across every supported system.
Maesn includes sandbox access for SnelStart so your team can start building immediately without waiting for separate sandbox provisioning.
Clockin helps small and mid-sized businesses digitize time tracking. From work hours to project times. User log everything via app or terminal, even offline, eliminating paper-based processes entirely.
"We use Maesn to successfully leverage integrations and partnerships as a key driver for lead generation and expansion into new markets and customer segments. By connecting Clockin to our customers' accounting systems, project data flows directly into their existing tools, ensuring a smooth, reliable data exchange with the systems they already use."
Fabian Ebbert
CSO @ Clockin
Unified. Certified. Production-ready.
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SnelStart authentication requires three separate credentials: a subscription key, a user-generated API key and a short-lived access token. Maesn abstracts the full authentication stack per tenant so your integration never handles multiple credential layers directly.
Subscription key, API key and access token all managed
Full three-layer auth flow abstracted behind a single API
No authentication logic required in your code
Creating some objects, e.g. a customer invoice in Pennylane requires multiple sequential API calls. Every object must be created through its own dedicated endpoint with no multi-object creation allowed. Maesn abstracts this orchestration, so your integration works with single consistent objects while Maesn handles the multi-call logic transparently.
Multi-step object creation abstracted to a single call
Dedicated endpoint requirement handled by Maesn
Unified object schema across all connected systems
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SnelStart access tokens expire every hour with no automatic refresh. Without central management each tenant requires continuous token rotation logic running independently. Maesn re-authenticates automatically in the backend so your integration stays connected at all times.
Hourly token expiry re-authenticated automatically per tenant
No token rotation logic required in your code
Integration stays connected without interruption
SnelStart operates a marketplace serving Dutch SMEs and bookkeeping firms. Getting listed requires an application via the SnelStart developer portal and a qualification process. Maesn supports you through the full process so your product reaches the Dutch SME market directly through the SnelStart ecosystem.
Application via SnelStart developer portal
Qualification process supported by Maesn
Direct visibility to Dutch SMEs and bookkeeping firms
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The Maesn docs cover every SnelStart endpoint, authentication flow and implementation detail, plus a full overview of the current coverage, which is continuously being expanded.
Full SnelStart endpoint & authentication documentation
Standard Auth-flow for your users
No custom token storage or grant token management
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Get listed with your app in the extensive SnelStart marketplace and drive inbound leads from Dutch SMEs.
Get insights and learn about the most imoportant systems in our country-by-country view of the European ERP and Accounting software landscape.
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SnelStart requires a subscription key, API key and hourly access token per tenant. Maesn abstracts the full authentication stack and rotates tokens automatically for you.
SnelStart requires multi-call orchestration to assemble complete objects and duplicate tax data at header and line-item level. Maesn normalizes both into a unified schema.
Once SnelStart 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 SnelStart.
You have more questions? We are looking forward hearing from you - book a meeting now!
A direct SnelStart integration requires navigating Dutch-only documentation behind a registration wall, implementing three-layer authentication with hourly token refresh per tenant, resolving multi-call object dependencies and handling duplicate tax data at both header and line-item level in every booking proposal. Maesn abstracts all of this behind a unified REST interface — so your team builds once and reaches SnelStart and every other system Maesn supports without maintaining any of the complexity directly.
SnelStart is a Dutch accounting software platform widely used by SMEs and bookkeeping firms in the Netherlands for invoicing, VAT handling, bank reconciliation and financial administration. It is one of the most common integration targets for software vendors operating in the Dutch market — particularly for products that automate invoice flows, contact synchronization and financial data exchange between business software and accounting.
SnelStart uses three separate credential layers: a subscription key, a user-generated API key and a short-lived access token that expires every hour. Maesn abstracts the full authentication stack and handles hourly token rotation automatically per tenant — no auth logic or token management required in your code.
SnelStart frequently requires multiple dependent API calls to assemble complete business objects. Maesn resolves all dependencies internally and exposes fully normalized objects aligned to its common data model — no orchestration logic required on your end.
SnelStart requires tax data at both header and line-item level on every booking proposal, and both must be consistent or the request fails. Maesn maps this to a single unified booking structure so you implement tax logic once and it works correctly across SnelStart and every other connected system.
SnelStart's official documentation is exclusively in Dutch and requires prior registration to access. Maesn's documentation covers SnelStart fully in English and is immediately accessible without registration — structured consistently across every supported system.
Yes. SnelStart operates a marketplace serving Dutch SMEs and bookkeeping firms. Maesn supports you through the application and qualification process via the SnelStart developer portal so your product reaches the Dutch market directly through their ecosystem.
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.
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