In this session of the Cardano Developer Office Hours, Satya Ranjan, Lead Blockchain Architect at the Cardano Foundation, presents Yaci Store, a pluggable indexing solution for Cardano. The talk covers out-of-the-box indexers, feature toggling, plugins for customization, and an API overview for easy querying. Satya highlights how Yaci Store simplifies indexing for Java and non-Java developers alike, with integration possibilities that go beyond Java.

A Roundtable Talk, features a deep-dive discussion on the evolution and implementation of Nested Transactions within the Cardano ledger. Participants discussed the technical readiness of the protocol, the potential for Babel fees, and the introduction of new programmability layers. The conversation also addressed risks regarding system complexity and censorship resistance, emphasizing the role of community consensus in navigating alternative paths for Cardano’s future governance and technical direction.

In this session of the Cardano Developer Office Hours, Thomas Kammerlocher, Senior Full Stack Developer, and Marco Russo, Integration Tools Team Lead at the Cardano Foundation, present Reeve, a new solution for financial reporting and transparency. They cover how Reeve simplifies reporting, supports verifiable and tamper-proof data, and builds trust across ecosystems. A live walkthrough demonstrates current features, how to run it, and future roadmap directions.

The Cardano Foundation launched Reeve, an enterprise reporting solution built on Cardano. It aims to boost financial transparency and corporate accountability by creating verifiable, tamper-resistant records. Reeve integrates with existing ERP systems to provide a secure and auditable ledger. The Foundation is now seeking partners to implement this solution and build a new layer of trust in financial operations.

A Roundtable Talk, features a discussion from the Cardano Berlin Hackathon on the ecosystem's economic sustainability. Participants discussed why sustainability matters, how transaction fees are earned, and the role of the Net Change Limit. The conversation also covered the challenges of empowering developers and the "skin-in-the-game" approach to using treasury funds to ensure Cardano's long-term viability.

In this session of the Cardano Developer Office Hours, Giovanni Gargiulo, Senior Software Engineer, DevOps at the Cardano Foundation, presents the new Token Registry API v2 with full CIP-68 support. He demonstrates API endpoints, explains best practices for using the query_priority parameter, and covers support for tokens under both CIP-26 and CIP-68. A live demo shows practical use cases and integration opportunities for developers.

A Roundtable Talk on June 25, 2025, provided a platform for candidates in the Constitutional Committee election. The session allowed individuals and groups to introduce their background, vision, and motivation for the role. Each candidate answered the same set of questions in a timed format, ensuring a fair and structured showcase for DReps and the community to make informed voting decisions before the June 30 deadline.

In this session of the Cardano Developer Office Hours, Fabian Bormann, Team Lead of Ecosystem Engineering at the Cardano Foundation, presents UVerify, a lightweight tool for certifying and verifying data on Cardano without tokens or NFTs. He covers datums as an alternative to metadata, SDKs and white-label tools for devs, and real-world use cases like documents, credentials, and oracles. A live demo shows UVerify in action. The roadmap explores frictionless integrations and future opportunities for verifiable interactions across ecosystems.

The Cardano Foundation has launched Originate, an open-source traceability solution built on the Cardano blockchain. It enables businesses to verify product authenticity and support certifications, enhancing supply chain transparency and combating counterfeiting. A successful case study in the Georgian wine industry demonstrated its effectiveness in fighting counterfeit products. Originate provides a secure, scalable, and cost-effective way for industries like luxury goods and pharmaceuticals to increase consumer trust. The code is available on GitHub for community contribution.

In this session of the Cardano Developer Office Hours, the team presents PoP (Proof of Provenance), a project to decentralize open-source development on Cardano. They cover risks of centralized infrastructure, using Cardano for verifiable software metadata, Merkle trees, and on-chain tracking. A live demo shows PoP in action. Use cases include secure versioning, on-chain test management, SPOs as decentralized oracles, and decentralized package tools.