STX Skill

Provides Stacks L2 STX token and contract operations using the Hiro API. Transfer and contract write operations require an unlocked wallet (use bun run wallet/wallet.ts unlock first). Balance and status queries work with just an address.

Usage

bun run stx/stx.ts <subcommand> [options]

Subcommands

get-balance

Get the STX balance for a Stacks address. Returns balance in both micro-STX and STX.

bun run stx/stx.ts get-balance [--address <addr>]

Options:

• --address (optional) — Stacks address to check (uses active wallet if omitted)

Output:

{
  "address": "SP2...",
  "network": "mainnet",
  "balance": {
    "microStx": "1000000",
    "stx": "1 STX"
  },
  "locked": {
    "microStx": "0",
    "stx": "0 STX"
  },
  "explorerUrl": "https://explorer.hiro.so/address/SP2...?chain=mainnet"
}

transfer

Transfer STX to a recipient. Requires an unlocked wallet.

1 STX = 1,000,000 micro-STX. Specify --amount in micro-STX.

bun run stx/stx.ts transfer --recipient <addr> --amount <microStx> [--memo <text>] [--fee low|medium|high|<microStx>]

Options:

• --recipient (required) — Stacks address to send to (starts with SP or ST)
• --amount (required) — Amount in micro-STX (e.g., "2000000" for 2 STX)
• --memo (optional) — Memo message to include with the transfer
• --fee (optional) — Fee preset (low|medium|high) or micro-STX amount; auto-estimated if omitted

Output:

{
  "success": true,
  "txid": "abc123...",
  "from": "SP2...",
  "recipient": "SP3...",
  "amount": "2 STX",
  "amountMicroStx": "2000000",
  "network": "mainnet",
  "explorerUrl": "https://explorer.hiro.so/txid/abc123...?chain=mainnet"
}

broadcast-transaction

Broadcast a pre-signed Stacks transaction to the network.

bun run stx/stx.ts broadcast-transaction --signed-tx <hex>

Options:

• --signed-tx (required) — The signed transaction as a hex string

Output:

{
  "success": true,
  "txid": "abc123...",
  "network": "mainnet",
  "explorerUrl": "https://explorer.hiro.so/txid/abc123...?chain=mainnet"
}

call-contract

Call a function on a Stacks smart contract. Signs and broadcasts the transaction. Requires an unlocked wallet.

bun run stx/stx.ts call-contract --contract-address <addr> --contract-name <name> --function-name <fn> [--args <json>] [--post-condition-mode allow|deny] [--post-conditions <json>] [--fee low|medium|high|<microStx>]

Options:

• --contract-address (required) — Contract deployer's address (e.g., SP2...)
• --contract-name (required) — Contract name (e.g., my-token)
• --function-name (required) — Function to call
• --args (optional) — Function arguments as JSON array (default: "[]"). For typed args: [{"type":"uint","value":100}]
• --post-condition-mode (optional) — deny (default) blocks unexpected transfers; allow permits any
• --post-conditions (optional) — Post conditions as JSON array. See SKILL.md for format.
• --fee (optional) — Fee preset or micro-STX; auto-estimated if omitted

Post condition format:

• STX: {"type":"stx","principal":"SP...","conditionCode":"eq","amount":"1000000"}
• FT: {"type":"ft","principal":"SP...","asset":"SP...contract","assetName":"token-name","conditionCode":"eq","amount":"1000"}
• NFT: {"type":"nft","principal":"SP...","asset":"SP...contract","assetName":"nft-name","tokenId":"1"}

Output:

{
  "success": true,
  "txid": "abc123...",
  "contract": "SP2....my-token",
  "function": "transfer",
  "network": "mainnet",
  "explorerUrl": "https://explorer.hiro.so/txid/abc123...?chain=mainnet"
}

deploy-contract

Deploy a Clarity smart contract to the Stacks blockchain. Requires an unlocked wallet.

bun run stx/stx.ts deploy-contract --contract-name <name> --code-body <clarity-source> [--fee low|medium|high|<microStx>]

Options:

• --contract-name (required) — Unique name for the contract (lowercase, hyphens allowed)
• --code-body (required) — The complete Clarity source code
• --fee (optional) — Fee preset or micro-STX; auto-estimated if omitted

Output:

{
  "success": true,
  "txid": "abc123...",
  "contractId": "SP2....my-contract",
  "network": "mainnet",
  "explorerUrl": "https://explorer.hiro.so/txid/abc123...?chain=mainnet"
}

get-transaction-status

Check the status of a Stacks transaction by its txid.

bun run stx/stx.ts get-transaction-status --txid <txid>

Options:

• --txid (required) — The transaction ID (64 character hex string)

Output:

{
  "txid": "abc123...",
  "status": "success",
  "block_height": 150000,
  "network": "mainnet",
  "explorerUrl": "https://explorer.hiro.so/txid/abc123...?chain=mainnet"
}

Notes

• Balance queries use the public Hiro API (no authentication required unless you set HIRO_API_KEY)
• Transfer and contract operations require an unlocked wallet (use bun run wallet/wallet.ts unlock first)
• Fees are auto-estimated if --fee is omitted; use presets (low|medium|high) or exact micro-STX amounts
• Post condition mode deny (default) prevents unintended asset movements; use allow only when necessary