> ## 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).

# Stacks

## Address derivation

Turnkey supports Stacks address derivation with `ADDRESS_FORMAT_COMPRESSED` and `ADDRESS_FORMAT_UNCOMPRESSED` address formats. Stacks addresses are derived from the secp256k1 curve, which Turnkey fully supports.

## Transaction construction and signing

Turnkey supports Stacks transaction signing through the core signing capabilities. We have an example repository that demonstrates how to construct and sign Stacks transactions:

> [examples/chain-integrations/with-stacks:](https://github.com/tkhq/sdk/tree/main/examples/chain-integrations/with-stacks) A sample script that demonstrates how to sign a [Stacks](https://docs.hiro.so/stacks/stacks.js) transaction with Turnkey. Stacks uses the secp256k1 cryptographic curve for transaction signing, but there is some specific data formatting that takes place for the [signing process](https://github.com/stacksgov/sips/blob/main/sips/sip-005/sip-005-blocks-and-transactions.md#transaction-signing-and-verifying).

## Key features for Stacks

* **secp256k1 signing**: Turnkey fully supports secp256k1 curve used by Stacks
* **Raw Transaction Signing**: Sign any Stacks transaction format with Turnkey's flexible signing API
* **Integration Example**: Our example repository provides a reference implementation

## Benefits of using Turnkey with Stacks

* **Secure Key Management**: Private keys never leave Turnkey’s secure infrastructure
* **Developer Friendly**: Integrate with existing Stacks development workflows
* **Signing Policies**: Apply custom policies to control transaction approvals
* **Multi-address Support**: Manage multiple Stacks addresses under a single organization