Juspay and Cumbuca Launch the Open Finance Playground, an Open-Source Developer Guide for Brazil’s Open Finance Ecosystem

Juspay and Cumbuca launched the Open Finance Playground, an open-source implementation guide for Brazil’s Open Finance ecosystem accessible to any developer for the first time.

Brazil operates the largest open finance ecosystem in the world, yet only 3% of Brazilian companies are connected to it, compared with 20% in the United Kingdom. Open banking frameworks are complex everywhere, but markets like the UK have had years of community tooling, guides, and developer resources built up around their frameworks. Brazil’s official documentation was built to satisfy regulatory requirements, not to help developers get started, and the adoption numbers reflect that. 

Brazil’s Open Finance ecosystem: by the numbers

• 100 million+ connected customers
• 154 million active consents
• 5 billion+ weekly communications between financial institutions
• Nearly fivefold growth in payment initiation volume in one year – R$3.2 billion (2024) to R$15.3 billion (2025)

The Playground distills hundreds of pages of regulatory specification into practical, step-by-step implementation workflows covering consent flows, payment initiation, and data access. A live simulator runs alongside each guide, showing the API calls behind every step in real time. The project is open source and supported by INIT, the Payment Transaction Initiators Association.

“Open Finance only fulfills its promise when the builders who create value in the ecosystem can actually access it. Making it faster and cheaper for developers to enter is the most direct lever for closing that gap. The Open Finance Playground is precisely the kind of practical, community-driven resource that accelerates adoption from the ground up, and the type of initiative INIT exists to support,” said Jonatas Giovinazzo, President Director, INIT.

For Juspay, the Playground reflects both the challenge and the opportunity of building in Brazil. Operating under Cumbuca’s payment institution license, the company was able to enter the Brazilian market 12 to 18 months ahead of what would have been possible building independently. With fully developed Open Finance payment capabilities, Juspay works alongside Visa and Mastercard, and supports Brazilian merchants like Latam Airlines, Food2Save & more, with native integrations for Pix Biométrico (biometric-authenticated payments) and Pix Automático (automated recurring transfers) built on Brazil’s national RTP network.

“Brazil’s Open Finance has extraordinary scale, and we’ve only scratched the surface of what it can do,” said Nic Marcondes, Director of Open Finance Monitoring at Cumbuca. “The Playground is that missing piece of the puzzle, written by people who have spent years inside the implementation, and released openly because a narrower ecosystem serves nobody.”

“We’ve seen what happens when real-time payment rails reach critical mass, and Brazil is at exactly that moment,” said Shakthidhar Bhaskar, Director of LATAM Expansion at Juspay. “Open-sourcing what we learned accelerates that. The infrastructure gets more valuable when more people can build on it, and the Playground makes that possible.”

The Open Finance Playground is available now at https://juspay.io/open-finance. It is open-source and open to contributions from developers, ecosystem participants, and financial institutions building on Brazil’s Open Finance Infrastructure.