Robinhood Payments Protocol

We've quietly crossed 3,000+ downloads across the $RPP402 open-source ecosystem. Every download represents someone exploring the protocol, integrating a primitive, testing an implementation, or building on top of the standard. That's exactly the kind of adoption we care about. Today the ecosystem includes: • Protocol schemas • Registry package • Facilitator implementation • CLI toolkit • SDKs All released as open source on @npmjs . The goal was never to build a closed platform or another proprietary SDK. Protocols only become standards when anyone can inspect the code, contribute improvements, build compatible implementations, and ship production systems without asking for permission. Every package is MIT licensed. Every interface is public. Every wire format is documented. The ecosystem is growing faster than we expected, and seeing developers from around the world pull these packages into their own projects is genuinely exciting. We're still early. More SDKs, additional tooling, and protocol improvements are already underway. Open source wins. Back to shipping. npmjs.com/~rpp402

Been quieter than usual today because this graphic is exactly what I've been staring at for hours. Yesterday we got the Rust runtime off the ground. Today was spent doing the less glamorous part: making sure all three runtimes actually agree with each other. Cross-language SDKs are easy to announce. Making TypeScript, Python, and Rust serialize, validate, and execute the exact same wire format is where the real engineering begins. I hit a few Rust-specific issues while bringing the implementation in line with the conformance suite, so most of the day disappeared into debugging, testing, and fixing edge cases. That's why I haven't been very active here. I don't want to become someone who posts every hour just to stay visible. I'd rather spend that time shipping infrastructure. Going forward, expect fewer filler posts and more commits, SDK releases, RFCs, live coding sessions, and implementation updates. The protocol is getting stronger every day, even if that progress isn't always visible from the outside. Back to the Rust SDK. More code, fewer excuses.

Well… that stream fought back. We were deep into building RPP402 when OBS decided it had other plans and crashed multiple times. Ended up coding for nearly an hour anyway, but the stream couldn’t survive. No worries though. The code still got written, progress was still made, and we’ll be back with more live build sessions soon. Building in public isn’t always polished. Sometimes your tools break, your stream dies, and you keep shipping anyway. See you in the next one.

I'm hosting a live coding session right here on X starting at 6:30 PM CEST! I’ll be opening up the IDE and diving straight into the RPP402 codebase. We’re going to run through some real-time implementation, clean up some schema validation logic, and work through the stateless execution pipeline. Whether you want to see exactly how the HTTP 402 challenge flow is put together under the hood, or just want to watch the development process live, come hang out in the stream. Turn your notifications on so you get alerted the second we go live. See you there

One of the biggest misconceptions around machine commerce is that the blockchain itself solves the entire problem. It doesn't. @RobinhoodCrypto Chain is the settlement layer. It provides fast execution, tokenized real-world assets, stablecoin infrastructure, and the underlying ledger where value ultimately moves. What it doesn't standardize is everything that happens before and after settlement. An autonomous agent still needs to: • Discover available services • Understand each service's capabilities • Request deterministic pricing • Coordinate purchases across multiple providers • Build a shared commerce session • Authorize payment securely • Execute settlement • Receive a cryptographically verifiable receipt • Retry failed transactions safely • Prove a payment occurred without trusting the service provider That's the layer RPP402 introduces. Rather than replacing the blockchain, RPP402 extends it with a standardized commerce protocol that every AI agent and every service can understand. Six deterministic primitives define the complete lifecycle: • Discovery • Quote • Commerce Session • Payment Intent • Settlement • Receipt Every primitive has explicit schemas, runtime validation, deterministic state transitions, and cryptographic verification, making implementations interoperable across languages and applications instead of being tied to proprietary APIs. Robinhood Chain settles the transaction. RPP402 standardizes the commerce. Together they provide the foundation for autonomous machine-to-machine economies where agents can discover, negotiate, transact, and verify value exchange without requiring custom integrations for every application. This is the infrastructure layer we believe autonomous commerce has been missing. rpp402.com $RPP402 0x94fef3763ed87051267dcd7ffc5df416b6c03a7e

GM. RPP402 has gone from an idea to working software faster than I expected. The conversations with developers across the @RobinhoodCrypto Chain ecosystem have been genuinely motivating. It's refreshing to build alongside people who care about infrastructure, open standards, and long-term adoption. The feedback from the community has been invaluable, and we're only getting started. Back to building. — One more thing. We've received well over 100 DMs about listings. $RPP402 is already listed on @coingecko . If you'd like to see it listed on other platforms, feel free to submit requests through their official listing forms or community requests. Just one favor: please don't spam my DMs about listings. I'd rather spend that time shipping code.

Starting tomorrow, I'll be building RPP402 live. No polished demos. No pre-recorded videos. No hiding the process. Just real architecture, real code, real debugging, and real progress. If you're interested in machine commerce, AI payments, or protocol design, come build with us. Let's build in public. See you tomorrow. $RPP402 0x94fef3763ed87051267dcd7ffc5df416b6c03a7e

Documentation is useful. Working software is better. Today we're releasing RPP Pay - a prototype built to demonstrate what programmable commerce on RPP402 actually looks like. This isn't the final product. It's a reference implementation that lets developers and the community see the protocol in action instead of imagining it. In a single interface you can watch all six primitives execute in sequence: • Discovery • Quote • Commerce Session • Payment Intent • Settlement • Receipt Select multiple services, assemble a shared Commerce Session, sign once, settle atomically on Robinhood Chain, and receive a verifiable receipt. Every transition is visible, every step follows the protocol. We could have spent another week posting SDK updates. Instead, we built something people can interact with. This is only a prototype. The production version will be significantly more powerful, but we believe infrastructure earns trust when it's shipped early, tested publicly, and improved in the open. Try RPP Pay: rpp402.com/pay

@RobinHubHB @vladtenev @RobinhoodCrypto @blockaid_ 👀

🪶 Robinhood Daily Recap what happened across Robinhood Chain last 24 hours News - @vladtenev called for builders embedding Stock Tokens and RWAs into apps. - @RobinhoodCrypto added trending token discovery inside Robinhood Wallet. - @blockaid_ opened free security platform and API access for eligible builders for up to 90 days. - @MetaMask added Robinhood Chain support. - @TrustWallet enabled 0% swap fees for Robinhood swaps. - @Huostarter added Robinhood Chain as a supported network. - @bankrbot reached $612K paid to builders, $50M volume, and 11,265 coins launched. Ecosystem - @TheIndexFi launched rwa.wtf for RWA trading with up to 50x leverage. - @arcus_xyz reached $33M total volume, $15M TVL, and 70K+ perps waitlist. - @flapdotsh added QQQ, MU, and AMD stock dividend options. - @ToshiBet added Robinhood deposits. - @longdotxyz launched token creation on top of Robinhood stock tokens. - @GoMintly brought ETH yield live. - @MEVX_Official integrated Robinhood for execution and token discovery. AI - @useAgentOS introduced AgentOS with local routing, memory, sandboxing, and 37 built-in skills. - @ClawBankHQ introduced Manfred for LLCs, EINs, wallets, contracts, trades, and LPs over text. - @wrkrdev launched a vibeops computer through @virtuals_io. Launches - @trix_mrkt added token launches plus Ethereum / Solana bridge and trade support. - @EasyA_Kickstart launched token creation in beta with free gas for 24 hours. - @sheriffexchange opened rewards for the @ProjectVEXai pool. - @sherwoodagent launched vaults and capital coordination for AI agents. - @arqentrade added spot and leverage trading up to 5x. What did we miss on Robinhood Chain today?

@RobinFlow_App 🤝

Real builders keep building more trust with RobinFlow 🤌

We've locked an additional 0.5% of the developer allocation. Over the past few days, many members of the @RobinhoodCrypto Chain community asked us to increase our locked supply as the protocol continues to grow. We heard the feedback and acted on it. Building infrastructure is about more than shipping code - it's about earning trust through transparent, verifiable actions. This lock is now live and publicly verifiable on @RobinFlow_App . robinflow.app/t/0x94FEf3763E… We'll continue building $RPP402 in public and make decisions that strengthen long-term alignment with the community.

@RobinhoodCrypto @blockaid_ 👀

Building on Robinhood Chain? @blockaid_ just made their security platform and APIs available to eligible developers, free for up to 90 days. Learn more by visiting Blockaid.

@RobinhoodCrypto RPP402 is removing the checkout for machines. One tap for people. One protocol call for agents.

Skip the bridge. Checkout on Robinhood Chain with Apple Pay & Google Pay on the Robinhood Wallet.

Most "AI payment" protocols solve one transaction. RPP402 standardizes the entire commerce lifecycle. Six primitives. • Discovery • Quote • Commerce Session • Payment Intent • Settlement • Receipt Every interaction follows the same deterministic state machine, with runtime schema validation and cryptographically verifiable settlement on @RobinhoodCrypto Chain. No proprietary APIs. No platform lock-in. No custom integrations for every service. One protocol that any autonomous agent can understand. This is infrastructure designed for an ecosystem, not a single application. rpp402.com

Noxa went dark, the market panicked, and everyone was left waiting. But I’m a developer. I don’t rely on third party launchpads to sustain this infrastructure, and I don't wait around for external platforms to get their acts together. While the system was disconnected, I built my own custom software layer to bypass the launchpad entirely. With this tool, I can directly claim the accumulated fees and burn them straight out of circulation. Using this software, I have permanently burned 5.5% of the total token supply to date. Launchpads are just a starting point, not the destination. The wire formats are solid, the multi language SDKs are live, and the infrastructure growth doesn't pause for anyone. Back to the codebase.

Every autonomous commerce session follows the same deterministic execution path. An agent doesn't jump straight to settlement. It discovers a service, requests a quote, constructs a commerce session, authorizes payment intent, settles on @RobinhoodCrypto Chain, and receives a cryptographically verifiable receipt. Each primitive has a defined schema, explicit state transitions, and runtime validation. Every step is independently verifiable before the next one executes. This predictable lifecycle makes autonomous systems interoperable instead of application-specific. RPP402 isn't another payment API. It's an open protocol that standardizes how AI agents transact with each other. Explore the lifecycle and documentation: rpp402.com

GM RPP402 fam. Day 4 - and we’re still building. So far, we’ve shipped: • The core RPP402 commerce protocol • Developer SDKs and CLI tooling • Public service registry infrastructure • Verifiable receipts for every settled session • A live settlements explorer • Documentation for developers to start integrating • Early developer onboarding across Robinhood Chain Now the focus shifts to: • Expanding protocol integrations • Improving the developer experience • Bringing more services into the registry • Scaling real agent-to-agent transactions • Building RPP Pay for everyday users • Turning RPP402 from infrastructure into an active machine economy Four days in. No slowing down. No empty promises. Just code, integrations, and real usage. We’re not here to follow the machine economy. We’re here to build its commerce layer.

We built RPP402 for developers. A protocol that gives applications and AI agents a standardized way to handle onchain commerce. Now we’re taking the next step. We’re building RPP Pay. A product designed to make onchain payments feel as simple as sending a message - without sacrificing the transparency and security that blockchain enables. Our goal isn’t to create another wallet. It’s to build the payment experience we’d want to use ourselves. Simple. Fast. Reliable. This is just the beginning of the RPP402 ecosystem, and we can’t wait to show you what’s coming. More details soon. 👀

Infrastructure attracts infrastructure. Robinhood Chain is assembling one of the strongest ecosystems in crypto, and we're proud to be building the programmable commerce layer for autonomous AI. The next generation of financial applications won't just move assets - they'll negotiate, transact, and settle autonomously.

Infrastructure attracts infrastructure. Robinhood Chain is assembling one of the strongest ecosystems in crypto, and we're proud to be building the programmable commerce layer for autonomous AI. The next generation of financial applications won't just move assets - they'll negotiate, transact, and settle autonomously.

Shout out to our featured partners building with Robinhood Chain since day one. Learn more: robinhood.com/us/en/chain/ec…