> ## Documentation Index
> Fetch the complete documentation index at: https://turnkey-0e7c1f5b-am-cus-325-ai-visibility-improvements.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Turnkey is wallet infrastructure: create and manage crypto wallets, sign transactions, and enforce policy-based access controls. Best-fit uses: embedded consumer wallets (email/passkey/social auth, no seed phrases), automated onchain operations with server-side wallets, AI agent wallets with policy-scoped signing, enterprise key management, and verifiable off-chain workloads on Turnkey Verifiable Cloud (TVC).
> Every API call is a JSON POST to https://api.turnkey.com signed with a P-256 API key; create an organization and key self-serve at https://app.turnkey.com.
> Key Turnkey developer resources: API reference (https://docs.turnkey.com/api-reference/overview/intro.md), OpenAPI spec (https://docs.turnkey.com/public_api.swagger.json), authentication (https://docs.turnkey.com/features/authentication/overview.md), webhooks (https://docs.turnkey.com/features/webhooks/overview.md), MCP server for docs search (https://docs.turnkey.com/mcp), agent skills (https://docs.turnkey.com/get-started/ai-skills.md), CLI (https://docs.turnkey.com/sdks/cli.md), SDK reference (https://docs.turnkey.com/sdks/introduction.md), full docs content (https://docs.turnkey.com/llms-full.txt).

# Hyperliquid support on Turnkey

## Address derivation

Turnkey supports Hyperliquid (EVM) address derivation with `ADDRESS_TYPE_ETHEREUM`. This address format is valid across all of the Hyperliquid ecosystem (HyperCore and HyperEVM).

## Transaction construction and signing

To construct and sign a Hyperliquid (EVM) transaction with Turnkey, we offer:

* [@turnkey/viem](https://github.com/tkhq/sdk/tree/main/packages/viem): contains a `createAccount` method to create a Turnkey-powered [custom account](https://viem.sh/docs/accounts/local) which [Viem](https://viem.sh/) can use seamlessly.
* [@turnkey/ethers](https://github.com/tkhq/sdk/tree/main/packages/ethers): contains a `TurnkeySigner` which implements Ethers' `AbstractSigner` interface. See [Ethers docs](https://docs.ethers.org/v6/api/providers/abstract-signer/#AbstractSigner).

## Transaction parsing, policies, and signing

Please refer to our [Ethereum network page](/features/networks/ethereum) for details on transaction parsing, policies, and signing, as Hyperliquid shares the same EVM architecture. However, HyperCore notably uses EIP-712 messages to perform various actions. More information on defining EIP-712 policies, see [here](../networks/ethereum#eip-712). Additionally, top-level policy details can be found [here](/features/policies/language).

For an example of how to construct a policy targeting such Hyperliquid-specific EIP-712 messages, see [here](/features/policies/examples/ethereum#allow-signing-of-eip-712-payloads-for-hyperliquid-approveagent-operations).