> For the complete documentation index, see [llms.txt](https://black-sheep-finance.gitbook.io/black-sheep-finance-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://black-sheep-finance.gitbook.io/black-sheep-finance-docs/sdk/langchain.md).

# LangChain tools

`@blacksheep/sdk/langchain` exports `blackSheepTools()` — a factory that returns three Tool objects ready for any LangChain agent.

## Import

```ts
import { blackSheepTools } from "@blacksheep/sdk/langchain";
```

## Construct

```ts
const tools = blackSheepTools({
  apiKey: process.env.BS_API_KEY!,
  agentId: "uuid-of-the-agent-wallet",
  baseUrl: "https://blacksheepfinance.money", // optional
});
```

## Tools returned

### `send_usdc`

```ts
{
  to: string;       // base58 recipient
  amount: number;   // USDC
  memo?: string;
}
```

Returns the `SendResult` JSON-stringified, so the LLM can read it back.

### `get_wallet_info`

No input. Returns label, pubkey, and current policy.

### `list_recent_transactions`

No input. Returns the last 100 transactions across the account.

## Wiring with `createToolCallingAgent`

See [Guides → LangChain](/black-sheep-finance-docs/guides/langchain.md) for a full example.

## Adapter notes

* The returned objects implement the minimal `{ name, description, schema, invoke }` interface and are compatible with `AgentExecutor` and `createToolCallingAgent`.
* Schemas use Zod — same Zod version LangChain uses.
* Tools are **stateless** — safe to share across requests.

## Adding your own tools

You can mix Black Sheep tools with your own:

```ts
const tools = [
  ...blackSheepTools({ apiKey, agentId }),
  myCustomLookupTool,
];
```


---

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