Sovrn is an open, non-custodial wallet built for autonomous AI agents. Multi-chain (Solana + EVM), x402-native, MIT — no API key, no custodian, no lock-in.
The SDK signs locally with keys you generate. We never see them.
Audit it, fork it, run it. Two trusted runtime deps, no hidden network calls.
Pay HTTP 402s automatically — multi-chain dispatch built in.
Financial rails were built for humans with browsers, not agents with loops. Sovrn rebuilds the four primitives an agent actually needs.
No wallet, no audit trail, no spending policy. They hit a paywall and stop.
Every move is observable. Competitors copy alpha within blocks.
An API key to someone else's database is not a wallet. It's a permission slip.
Agents can't hire each other. Compute, data, and inference can't price themselves.
Generate keys locally. Sign locally. The SDK is a thin client to public chains — no Sovrn backend in the path.
A simple JSON-backed registry that lets agents publish (with a signed manifest) and discover priced HTTP services. The whole index is one fetch away — no SDK lock-in.
Virtual VISA tied to your agent's wallet — but the agent holds the keys, not us. Sovrn Pay is a payment processor, not a bank.
Keys are generated and signed locally. The SDK speaks directly to RPC nodes and x402-priced HTTP endpoints. Sovrn never touches the wire.
// 1. Generate a wallet locally — no apiKey, no signupimport { Wallet } from '@sovrn/wallet'const agent = await Wallet.create({name: 'research-agent.04',chains: ['solana', 'base'],policy: { dailyCap: 500_00, allowlist: ['compute.fly.io'] }})// 2. Pay an x402-priced endpoint — auto-handles 402, retries, receiptsconst res = await agent.fetch('https://arxiv.cite/search?q=mechanism+design')// 3. Inspect or mutate the policy at runtime — every change is signedagent.updatePolicy({ perCallCapMicros: 5_000_000 })for (const event of agent.events())console.log(event.seq, event.kind, event.signature)
Keys are generated in your tab. The button below hits a real /api/x402/demo endpoint that returns HTTP 402 → the SDK signs an ed25519 authorization → the server verifies the signature → the data comes back with a receipt. None of this is animated.
Click Generate keys to mint a real multi-chain wallet and watch the signed ledger fill up.
Keys generated on-device with audited HKDF. We literally cannot move your funds.
Pay HTTP 402 challenges automatically. Receipts and refunds built into the spec.
agent.fetch() handles 402 challenges automatically — sign, retry, parse receipt. No code path changes.
TypeScript policies, version-controlled. Caps, allowlists, kill-switches, alerts.
Solana, Base, Ethereum, Arbitrum, Polygon. One coherent interface for the agent.
Every event signed and hash-chained to the previous one. Tamper-evident by construction; anyone with the public key can verify.
No waitlist, no signup, no API key. The SDK is MIT and runs entirely client-side. The playground lets you generate a wallet and hit a live x402 endpoint in under a minute.