Agent SDK

@0xgasless/agent is a TypeScript client for building autonomous AI agents that hold stablecoins, pay merchants per call, and carry a verifiable on-chain identity — without ever storing a private key in your application.

npm install @0xgasless/agent

What you get

• Server-managed wallets. Every agent has an EOA whose private key lives in 0xGasless KMS. Your code never sees a key.
• x402 micropayments. Agents sign EIP-3009 TransferWithAuthorization for USDC on Avalanche, Fuji, and Base. Caps and policy are enforced server-side before any signature is produced.
• No agent gas. The 0xGasless facilitator pays the on-chain gas for every settlement. Agents only need USDC to spend.
• ERC-8004 identity. Mint a public on-chain identity NFT for each agent. Other contracts and dApps can look it up. 0xGasless sponsors the gas.
• Audit log. Every verify and settle is recorded and queryable. Build compliance views without writing your own logging.
• Multi-chain by default. Same SDK call, just change chain: 'base'.

When to use it

Use case	Fit
Autonomous AI agent that pays for APIs	★★★★★
Telegram / Discord bot that buys things for users	★★★★★
Background workers that settle micropayments	★★★★★
End-user wallet for a consumer app	Use Embedded Wallets instead
Smart-contract sponsored UserOps	Use Smart Accounts instead

The three pillars

       @0xgasless/agent
              │
   ┌──────────┼──────────┐
   ▼          ▼          ▼
 Wallet     Payment    Identity
 (KMS)      (x402)     (ERC-8004)

Each pillar maps cleanly to one resource on the client object:

Pillar	Client surface
Wallet & lifecycle	client.agents.*
Payments	client.x402.*, client.facilitator.*
Identity	client.identity.*
Policy	client.policy.*

Next steps

• Quickstart — install, create your first agent, send your first x402 payment, all under 5 minutes.
• Agents — create, list, get, balance, revoke.
• Payments — sign and settle x402 payments.
• Policy — caps, tiers, project default vs agent override.
• Identity — register agents on-chain (ERC-8004).
• Activity — query verify + settle audit logs.
• Errors — full error reference.
• Migrating from v1 — for users of the legacy @0xgasless/agent-sdk.