Documentation Index
Fetch the complete documentation index at: https://docs.crossmint.com/llms.txt
Use this file to discover all available pages before exploring further.
Use an external wallet signer to connect an existing blockchain wallet or keypair — such as MetaMask, Phantom, or a raw keypair — as an operational signer on a Crossmint smart wallet. This signer type is designed for crypto-native users who already have a wallet and want to use it to control a Crossmint smart wallet.
For a conceptual overview, see External wallet in the Wallet Signers guide. To learn how to register additional operational signers on an existing wallet, see Registering a signer.
Configuration
React
Node.js
React Native
REST
import { useWallet } from '@crossmint/client-sdk-react-ui';
const { getOrCreateWallet } = useWallet();
const wallet = await getOrCreateWallet({
chain: "solana",
signer: {
type: "external-wallet",
address: "WUyB2nCgAFhcf9vJ34s7vUK4KJc77bgoeM3swMcwfWn",
},
});
import { CrossmintWallets, createCrossmint } from "@crossmint/wallets-sdk";
const crossmint = createCrossmint({
apiKey: "<your-server-api-key>",
});
const crossmintWallets = CrossmintWallets.from(crossmint);
const wallet = await crossmintWallets.createWallet({
chain: "solana",
signer: {
type: "external-wallet",
address: "WUyB2nCgAFhcf9vJ34s7vUK4KJc77bgoeM3swMcwfWn",
},
});
import { useWallet } from '@crossmint/client-sdk-react-native-ui';
const { getOrCreateWallet } = useWallet();
const wallet = await getOrCreateWallet({
chain: "solana",
signer: {
type: "external-wallet",
address: "WUyB2nCgAFhcf9vJ34s7vUK4KJc77bgoeM3swMcwfWn",
},
});
curl --request POST \
--url https://staging.crossmint.com/api/2025-06-09/wallets \
--header 'Content-Type: application/json' \
--header 'X-API-KEY: <x-api-key>' \
--data '{
"chainType": "solana",
"config": {
"adminSigner": {
"type": "external-wallet",
"address": "WUyB2nCgAFhcf9vJ34s7vUK4KJc77bgoeM3swMcwfWn"
}
}
}'
