External Wallet

Use external wallet mode when the agent should be tied to an address you control. Abstraxn stores the address on the agent record but does not connect wallet providers, provision a server wallet, or return an accessKey.

The default Agent Kit mode is server (managed Abstraxn wallet). This page covers external only. For Abstraxn server wallet / server-signer flows see SDK quickstart.

When to use external wallet

Use external when…	Use server wallet when…
Users bring their own wallet (browser extension, mobile, embedded)	You want Abstraxn-managed signing
You already have custody / signing infra	You need `accessKey` + Abstraxn server wallet flows
You must not store Abstraxn wallet secrets	MCP tools sign via server-signer (`transfer`, x402)

Prerequisites

Node.js 18+
@abstraxn/agent-kit v1.0.3+
Abstraxn API key (x-api-key)
A wallet stack in your app that can expose evmAddress / solanaAddress (and sign txs if you register ERC-8004 identity)

Wallet connection in your app (optional)

Agent Kit only needs the address strings at createAgent() time. How users connect a wallet is entirely up to you — pick any provider below, read their guide, then pass the connected address into Agent Kit.

Provider / stack	Use for	Docs
Privy	Embedded + external wallets, auth	Privy docs
MetaMask	Browser extension (EVM)	Connect with MetaMask
WalletConnect	Mobile & multi-wallet (EVM)	WalletConnect docs
viem	Headless EVM signing (backend or frontend)	viem docs
ethers	EVM signing (v6)	ethers docs
Abstraxn Wallets (React)	MetaMask / WalletConnect in a React app	External wallet hooks

These links are optional. Abstraxn does not require a specific provider. After the user connects, call createAgent({ evmAddress, … }) (or solanaAddress). For ERC-8004, use the same wallet to sign — see On-chain identity.

Configure the client

import { AgentKitClient } from '@abstraxn/agent-kit';

const agentKit = new AgentKitClient({
  apiKey: process.env.ABSTRAXN_API_KEY!,
  wallet: 'external',
});

getWalletMode() returns 'external' when configured. You can also keep wallet: 'server' on the client and pass wallet: 'external' on a single createAgent() call.

Create an agent

const { agent, wallet } = await agentKit.createAgent({
  name: 'Trading Assistant',
  description: 'Uses the user-owned wallet',
  userIdentity: 'user-123@example.com',
  evmAddress: '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb',
  // solanaAddress: '...', // optional — at least one address required
});

console.log(wallet.type);       // 'external'
console.log(wallet.evmAddress); // persisted on the agent
console.log(agent.id);

Response shape

Field	External wallet
`wallet.type`	`'external'`
`wallet.evmAddress`	Your normalized EVM address
`wallet.solanaAddress`	Optional
`wallet.accessKey`	Not set
`wallet.organizationId`	Not set

Do not expect or store an accessKey for external agents. All on-chain signing is your responsibility.

Validation rules

At least one of evmAddress or solanaAddress is required.
EVM addresses are normalized to 0x + 40 hex characters (lowercase).
createAgentDirect() is equivalent: creates the agent with addresses only (no server-signer).

Per-call override

const { agent, wallet } = await agentKit.createAgent({
  wallet: 'external',
  evmAddress: '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb',
  name: 'My Agent',
  description: '...',
  userIdentity: 'user@example.com',
});

What external wallet does not do

Does not call Abstraxn server-signer or managed wallet provisioning
Does not return accessKey or organizationId
getServerSigner() is for server wallet integrations only
registerAgentIdentity() requires server wallet credentials — use on-chain identity (external) instead
MCP transfer and autonomous x402 signing require a server wallet accessKey on your backend

FAQ

Can I use MetaMask instead of a private key in signTransaction? Yes. See On-chain identity (external) for prepare/confirm with MetaMask or WalletConnect. Can I register with Solana only? Yes — pass solanaAddress on createAgent (with or without evmAddress). ERC-8004 registry examples in the SDK are EVM-focused; confirm Solana registry support with your Abstraxn deployment if needed. Why does prepare fail for my chainId? The Agent Kit backend must have IdentityRegistry configured for that chainId. Use a supported chain or contact support.

Getting started

SDK & wallets

Third-party integrations

Off-chain policies

Identity

Build your app

MCP

Payments

Help

When to use external wallet

Prerequisites

Wallet connection in your app (optional)

Configure the client

Create an agent

Response shape

Validation rules

Per-call override

What external wallet does not do

FAQ

Next steps

On-chain identity

API reference

SDK quickstart (server wallet)

ERC-8004 identity

​When to use external wallet

​Prerequisites

​Wallet connection in your app (optional)

​Configure the client

​Create an agent

​Response shape

​Validation rules

​Per-call override

​What external wallet does not do

​FAQ

​Next steps

On-chain identity

API reference

SDK quickstart (server wallet)

ERC-8004 identity

When to use external wallet

Prerequisites

Wallet connection in your app (optional)

Configure the client

Create an agent

Response shape

Validation rules

Per-call override

What external wallet does not do

FAQ

Next steps