Sustainability Subsidy API

The Subsidies API enables users to discover sustainability subsidies in the Netherlands based on their postcode and access Dutch loan programs such as Warmtefonds and SVN.

Introduction

The Subsidy API gives developers programmatic access to Dutch sustainability funding data. It aggregates subsidies and loans from national, provincial, and municipal sources into a single endpoint, and adds calculation logic on top so you can return eligibility and cost estimates directly in your application.

Use the API to:

• Retrieve current subsidy and loan programs from official Dutch government sources.

• Check eligibility against applicant inputs such as income, home ownership, and project type.

• Calculate loan options, including interest, total cost, and monthly installments based on duration and repayment period.

• Estimate the ISDE subsidy amount (Investeringssubsidie duurzame energie) for a given applicant and project.

Typical integrations include mortgage advisor platforms, energy label tools, and home improvement calculators that need to surface funding options at the point of decision