Build fintech apps you can’t build anywhere else

Get started with clear documentation and sample code to build something new in no time with our API.

Illustration of a rainbow-colored bunq debit card with binary code (0s and 1s) cascading downward from the chip, symbolizing digital security and data encryption.

Build fintech apps you can’t build anywhere else

Get started with clear documentation and sample code to build something new in no time with our API.

Illustration of a rainbow-colored bunq debit card with binary code (0s and 1s) cascading downward from the chip, symbolizing digital security and data encryption.

Build fintech apps you can’t build anywhere else

Get started with clear documentation and sample code to build something new in no time with our API.

Illustration of a rainbow-colored bunq debit card with binary code (0s and 1s) cascading downward from the chip, symbolizing digital security and data encryption.

Building with bunq

Automate your finances, streamline your workflows, and build tools that work exactly the way you want them to whether you re a solo developer, a startup, or a growing team.

Building with bunq

Automate your finances, streamline your workflows, and build tools that work exactly the way you want them to whether you re a solo developer, a startup, or a growing team.

Building with bunq

Automate your finances, streamline your workflows, and build tools that work exactly the way you want them to whether you re a solo developer, a startup, or a growing team.

Illustration of a laptop displaying color-coded programming code, placed beside a small cactus plant on a desk.

For developers

Build smart, fun, and powerful experiences

Got an idea? Bring it to life. Our API is your sandbox—build cool fintech experiences, automate the boring stuff, and have fun doing it.

Illustration of a laptop displaying color-coded programming code, placed beside a small cactus plant on a desk.

For developers

Build smart, fun, and powerful experiences

Got an idea? Bring it to life. Our API is your sandbox—build cool fintech experiences, automate the boring stuff, and have fun doing it.

Illustration of a laptop displaying color-coded programming code, placed beside a small cactus plant on a desk.

For developers

Build smart, fun, and powerful experiences

Got an idea? Bring it to life. Our API is your sandbox—build cool fintech experiences, automate the boring stuff, and have fun doing it.

Graphic of a laptop with a purple briefcase and a bunq card in hand, symbolizing automated business workflows.

For businesses

Automate workflows, save time & scale

Say goodbye to manual errors and hello to automated workflows. Our API helps you save time, reduce costs, and scale with confidence.

Graphic of a laptop with a purple briefcase and a bunq card in hand, symbolizing automated business workflows.

For businesses

Automate workflows, save time & scale

Say goodbye to manual errors and hello to automated workflows. Our API helps you save time, reduce costs, and scale with confidence.

Graphic of a laptop with a purple briefcase and a bunq card in hand, symbolizing automated business workflows.

For businesses

Automate workflows, save time & scale

Say goodbye to manual errors and hello to automated workflows. Our API helps you save time, reduce costs, and scale with confidence.

Stylized image of an orange and yellow electric plug with lightning bolts, representing API integration power.

For PSD2 Partners

Connect your product to bunq

Connect with bunq through our PSD2 API* and get the data you need to deliver smarter, safer services to your customers.

Stylized image of an orange and yellow electric plug with lightning bolts, representing API integration power.

For PSD2 Partners

Connect your product to bunq

Connect with bunq through our PSD2 API* and get the data you need to deliver smarter, safer services to your customers.

Stylized image of an orange and yellow electric plug with lightning bolts, representing API integration power.

For PSD2 Partners

Connect your product to bunq

Connect with bunq through our PSD2 API* and get the data you need to deliver smarter, safer services to your customers.

Yellow gear meshing with a code window interface, depicting accessible API documentation and development support.

Ready, Set, Code

With step-by-step guides and ready-to-use code, our API documentation ensures a smooth integration process for teams of any size. Need help? Our API specialists are here to assist. Reach out anytime at apipartner@bunq.com. You can also connect with other developers and bunq experts for support on our forum.

Yellow gear meshing with a code window interface, depicting accessible API documentation and development support.

Ready, Set, Code

With step-by-step guides and ready-to-use code, our API documentation ensures a smooth integration process for teams of any size. Need help? Our API specialists are here to assist. Reach out anytime at apipartner@bunq.com. You can also connect with other developers and bunq experts for support on our forum.

Yellow gear meshing with a code window interface, depicting accessible API documentation and development support.

Ready, Set, Code

With step-by-step guides and ready-to-use code, our API documentation ensures a smooth integration process for teams of any size. Need help? Our API specialists are here to assist. Reach out anytime at apipartner@bunq.com. You can also connect with other developers and bunq experts for support on our forum.

Three interlocking gears in pink, purple, and black with a large “K” on the central gear, illustrating Klarna’s API integration with bunq.

How Klarna Leverages the bunq API

Klarna is using the bunq API to enable pay-by-bank payments and account aggregation across Europe. Through bunq's PSD2 APIs, Klarna initiates direct bank payments and collects real time account details, balances, and transactions. By integrating bunq s banking infrastructure, Klarna has delivered a smoother open banking experience, and continues to explore new endpoints to enhance their in app flows.

Three interlocking gears in pink, purple, and black with a large “K” on the central gear, illustrating Klarna’s API integration with bunq.

How Klarna Leverages the bunq API

Klarna is using the bunq API to enable pay-by-bank payments and account aggregation across Europe. Through bunq's PSD2 APIs, Klarna initiates direct bank payments and collects real time account details, balances, and transactions. By integrating bunq s banking infrastructure, Klarna has delivered a smoother open banking experience, and continues to explore new endpoints to enhance their in app flows.

Three interlocking gears in pink, purple, and black with a large “K” on the central gear, illustrating Klarna’s API integration with bunq.

How Klarna Leverages the bunq API

Klarna is using the bunq API to enable pay-by-bank payments and account aggregation across Europe. Through bunq's PSD2 APIs, Klarna initiates direct bank payments and collects real time account details, balances, and transactions. By integrating bunq s banking infrastructure, Klarna has delivered a smoother open banking experience, and continues to explore new endpoints to enhance their in app flows.

Disclaimer

*PSD2-compliant partners can access our API documentation and integrate with bunq once approved, but access to the full developer portal is reserved for bunq account holders.

Disclaimer

*PSD2-compliant partners can access our API documentation and integrate with bunq once approved, but access to the full developer portal is reserved for bunq account holders.

Disclaimer

*PSD2-compliant partners can access our API documentation and integrate with bunq once approved, but access to the full developer portal is reserved for bunq account holders.

Choose your plan

Try it free for 30 days, no strings attached.

bunq Pro Business

€13.99/month

Everything you need to scale your business.

bunq Elite Business

€23.99/month

Next level banking for your international business.

Choose your plan

Try it free for 30 days, no strings attached.

bunq Pro Business

€13.99/month

Everything you need to scale your business.

bunq Elite Business

€23.99/month

Next level banking for your international business.

Choose your plan

Try it free for 30 days, no strings attached.

bunq Pro Business

€13.99/month

Everything you need to scale your business.

bunq Elite Business

€23.99/month

Next level banking for your international business.

Frequently Asked Questions

What can I do with the bunq API?

Got an idea? Bring it to life.
The bunq API gives you the freedom to build creative, powerful apps and automations.

  • Developers can experiment, automate banking tasks, and integrate real-time financial data into apps.

  • Businesses can automate financial workflows, reduce human error, and scale operations with confidence.

  • PSD2 Partners can connect to bunq accounts to deliver smarter, faster open banking experiences to their customers.

Got an idea? Bring it to life.
The bunq API gives you the freedom to build creative, powerful apps and automations.

  • Developers can experiment, automate banking tasks, and integrate real-time financial data into apps.

  • Businesses can automate financial workflows, reduce human error, and scale operations with confidence.

  • PSD2 Partners can connect to bunq accounts to deliver smarter, faster open banking experiences to their customers.

Who can use the bunq API?

Anyone on a bunq Pro or Elite personal or business plan can access the API.
If you’re a licensed PSD2-compliant provider, you can also connect by following the steps in the documentation.

Are SDKs available for bunq’s API?

Yes! We offer official SDKs for the most popular programming languages:

  • PHP (available via Composer)

  • C# (available via NuGet)

  • Java (available via JitPack)

  • Python (available via PyPI)

You can find all the SDKs and installation instructions in our documentation.

How do I get an API key as a PSD2 user?

Once you’ve passed the QSEAL certificate validation, you’ll receive an OAuth token. You can then use this token as your API key to start accessing bunq accounts securely.

How do I get an OAuth client as a PSD2 user?

You’ll need to send a valid request with your QSEAL certificate details. Once approved, you’ll receive an OAuth client ID and secret, allowing you to authenticate securely with bunq’s PSD2 APIs.

What do I need to register my QSEAL certificate as a PSD2 user?

You’ll need to send a POST /payment-service-provider-credential request, including:

  • Your QSEAL certificate

  • Your QSEAL certificate chain

  • A signature of the device registration key, signed with your QSEAL private key

This secures your access and ensures PSD2 compliance.

If I need help, what should I do?

We’re here for you!

  • Email: Reach out to our API specialists anytime at apipartner@bunq.com

  • Community: Ask questions and find answers on our Help Center Forum here

  • Documentation: Check out our documentation for detailed guides and examples

Open your bank account in just 5 minutes

Open your bank account in just 5 minutes

Open your bank account in just 5 minutes

Get started