Twinfield API
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Compleet Boekhouden | € 114,50 per maand · 1 user (modular) · 5 administrations (modular) · Integrations with 300+ applications | €114.50 a month |
| Extra Boekhouden | € 58,- per maand · 1 user · 5 administrations · Integrations with 300+ applications · Standard reports | €58 a month |
| MKB Boekhouden | € 78,50 per maand · 1 user · 5 administrations · Integrations with 300+ applications · 38 reports | €78.50 a month |
As developers.twinfield.com lists them, read 7 Oct 2026. The maker's own page has the final word.
Facts from Twinfield API's own pages
- Accounting operations
- Available API operations include maintaining transactions, customers, suppliers, invoices, bank statements, budgets, payments, and dimensions. · developers.twinfield.com, 7 Oct 2026
- Accounting tiers
- API functions vary by Twinfield user level; sales invoice creation is available at Complete and SME Accounting levels but not Bookkeeping Plus or Basic Bookkeeping. · developers.twinfield.com, 7 Oct 2026
- Authentication
- Twinfield uses OpenID Connect for identity information and OAuth 2.0 for authentication, with implicit and authorization code flows supported. · developers.twinfield.com, 7 Oct 2026
- Certification and support
- Twinfield requires integrations to be certified and describes a continuing API subscription that includes certification, API support, and Developer Portal access. · assets.contenthub.wolterskluwer.com, 7 Oct 2026
- Concurrency limit
- The API allows up to 20 concurrent requests per ClientId and 10 per ClientId and organisation combination. · developers.twinfield.com, 7 Oct 2026
- Data retrieval
- Browse data can retrieve financial information such as general ledger transactions and sales invoices. · developers.twinfield.com, 7 Oct 2026
- Integrations
- Twinfield Bookkeeping says it connects with more than 300 different systems, and integrations must be certified to join its partner community. · wolterskluwer.com, 7 Oct 2026
- Intended users
- Twinfield describes its accounting software and API integrations as serving advisors and businesses, with features for collaborative accounting and linking business systems. · wolterskluwer.com, 7 Oct 2026
- Payload limit
- Twinfield recommends no more than 25 child elements per parent and 500 transaction or invoice lines; each transaction has a hard limit of 1,000 lines. · developers.twinfield.com, 7 Oct 2026
- Purpose
- The API provides developers with access to Twinfield accounting data and web services. · developers.twinfield.com, 7 Oct 2026
- Rate limits
- Certified integrations have a 1,000 API credit per minute ClientId bucket and 500 credit per minute per ClientId and organisation combination; new uncertified ClientIds receive 5% of those amounts. · developers.twinfield.com, 7 Oct 2026
- Security and compliance
- The API terms say Wolters Kluwer processes personal data in accordance with applicable privacy law including GDPR and takes technical and organisational measures to protect it. · assets.contenthub.wolterskluwer.com, 7 Oct 2026
- Transport security
- Twinfield API supports TLS 1.2 and 1.3; TLS 1.0 and 1.1 have been retired. · developers.twinfield.com, 7 Oct 2026
Where Twinfield API stands on Freedom251
- Accounting APIs#26 of 27