Whitepaper
The onchain desk for tokenized stocks.
v0.1 · August 2026
Arkyn is a read-only price terminal for Robinhood Chain stock tokens. It does not broker, custody, or trade. Mesh can meter the same API later without changing a field.
Abstract
Tokenized equities on Robinhood Chain look like ERC-20s. A wallet shows a balance. It does not show whether the print is fair versus cash, whether NYSE is open, or how many shares a token represents after a split. Arkyn reads Chainlink oracles, Robinhood cash quotes, and the session clock, then publishes one book — in a UI and as JSON — that humans and agents can share.
1. The problem
Onchain stock tokens trade around the clock. The cash market does not. Corporate actions change the share-per-token multiplier. Oracles go quiet outside regular hours. A balance list cannot tell you if the token looks rich, cheap, or in line — or that gap risk is on. Agents that pay for data need the same facts, without an account or an API key.
2. The desk
Arkyn is a desk, not a broker. You connect a wallet or paste an address. The book shows featured names with oracle USD, cash mid, token-fair, vs-cash in basis points, and a signal: in line, rich, cheap, halt, or unavailable. Portfolio lookup returns USDG plus featured token balances. We do not hold funds, place orders, or offer advice.
3. Feeds
Oracle prices come from Chainlink stock-token feeds on Robinhood Chain, including the corporate-action multiplier. Cash bid/ask comes from Robinhood's public quote API, scaled to the token. Session status is the NYSE clock in America/New_York: regular, extended, or closed. When the cash market is shut we show feed age and gap risk — not a fake tick.
4. The API
The same payload the desk uses is public: GET /api/v1/desk, /session, /portfolio, and /openapi. No key. Agents can crawl OpenAPI 3.1 first. Field names stay stable so Mesh can sit in front later and charge per request without a schema break.
5. Settlement
Quotes and books are in USD. When the desk is paid, settlement is USDG on Robinhood Chain (4663) over the Machine Payments Protocol via Mesh: HTTP 402, signed authorization, merchant wallet. $ARKYN is not required to read or pay. Buyers hold USDG; they do not take $ARKYN price risk to use the product.
6. $ARKYN
$ARKYN is the network token. A slice of launch supply drips to holders who use the desk. Once paid calls are live, a protocol fee in USDG accrues to holders. Claim stays in the connected wallet. Contract address, supply, and listing publish at TGE on this site only. Design details remain subject to change before launch. See the $ARKYN page and the roadmap.
7. Risks
Stock Tokens are tokenized debt securities issued by Robinhood Assets (Jersey) Limited. They confer no ownership or voting rights in the underlying. Not offered to US persons. Oracle and cash feeds can lag, halt, or disagree. This is not financial advice. Arkyn can be wrong; the chain and the cash tape are the source of truth.
8. Conclusion
The missing piece on Robinhood Chain is not another wallet. It is a desk that says what a tokenized name is worth, whether that print is in line, and whether the cash market is even open — in a page a person can read and a JSON an agent can pay for.