A 36-hour sprint on the XRP Ledger, hosted by XRPL Commons in New York. Three tracks for teams building with Ledger as the trust layer: bring device-backed security to XRPL apps, build agentic payment flows, or take on the deep integration work, including things Ledger doesn't support yet.
Pick one track. Whatever you build, we want Ledger used as a real trust layer, not just wallet branding, and a working demo. One requirement across all three tracks: your project must land at least one transaction on the XRP Ledger or its EVM sidechain. Testnet counts.
Track 01 · Core
Protocol Innovation
$4,000
The deep-integration track. Bring the modern Ledger stack into the XRPL ecosystem, and lean into the gaps. Ledger's XRP support is thin and moving fast: the device app can sign a wide range of XRPL transactions, but Ledger Wallet only exposes basic send/receive, the Device Management Kit's XRP signer landed days ago as a pre-release that does addresses, signing, and app config and nothing more, and there is still no XRPL transaction Clear Signing. This track is your invitation to build the things we don't support yet. A rough prototype that fills a real gap beats a polished rebuild of something that already exists.
Example directions
Put the brand-new device-signer-kit-xrp to work. It is pre-release only, so integrate it into a real app, find where it breaks, and extend it toward the transaction types it does not cover yet. Bug reports and PRs count.
Prototype human-readable previews for XRPL transactions: a metadata format plus an in-app parser that turns TrustSet, OfferCreate, AMM or Escrow payloads into plain-language summaries before you sign, extending the Clear Signing idea beyond EVM / ERC-7730.
Ship a Ledger-secured DEX / AMM / trustline dApp for the flows Ledger Wallet can't do today: set trustlines, place order-book offers, add AMM liquidity, all signed on-device.
Use Ledger's Ethereum signer on the XRPL EVM sidechain (chain ID 1440000): deploy or consume a contract and sign with the ETH DMK signer plus Clear Signing.
Build a Xaman xApp (or wallet integration) with Ledger signing, bringing cold-storage security to a tool people already use.
Device-signed tooling for NFTs (XLS-20), AMM pools, Escrow / Payment Channels, or multisig treasuries: the device app signs these and the pre-release signer will pass the bytes through, but nothing above it understands the types yet, so there are no type-aware helpers and no Clear Signing.
Build across the full agentic stack with Ledger as the trust layer. Finance is a strong angle but not a requirement. We want projects where device-backed security is central: agents that pay for tools and services, human-in-the-loop approval for sensitive actions, and copilots that make autonomous behavior safer instead of bypassing user intent. XRP's fast, low-cost settlement is a natural rail when money does move.
Example directions
Agents that pay for APIs, tools, or services with Ledger-secured flows, including x402-style pay-per-use patterns.
Human-in-the-loop agents where Ledger approves high-risk actions before funds move or permissions escalate.
Agents that use secrets they cannot leak: a broker hands out scoped capabilities, never the API key.
Agents that settle on XRPL: streaming payments, per-call micropayments, or escrow-backed work agreements, all approved on device.
The open track. Build whatever you want with Ledger. Your idea does not have to be an XRPL protocol project: consumer apps, wallet UX, security tooling, tipping, games, and education all count, as long as it settles at least one transaction on XRPL or the EVM sidechain. Great for teams with an idea that doesn't fit neatly into the other two tracks.
Example directions
A polished consumer app or wallet experience, on XRPL or the EVM sidechain, that signs with a Ledger device.
Tooling that makes XRPL easier for people, not protocols: address books, spending monitors, alerting, onboarding flows.
Something fun: an on-chain game, a collectible, or an interactive demo backed by device signing.
Learn how to build on Ledger with the Device Management Kit: connect a device, sign XRPL transactions with the XRP signer, and develop without hardware on Speculos, the Ledger device emulator.
