> For the complete documentation index, see [llms.txt](https://predictbase.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://predictbase.gitbook.io/docs/developer/endpoints/mint-shares.md).

# Mint Shares

Mint shares to add liquidity to a market. For every $1 you mint, you receive 1 share of each option. You can sell these shares by submitting **sell orders** to the orderbook.

The minted amount will be deducted from your PredictBase account balance.

***

#### **Endpoint**

```http
POST /mint-shares-for-user
```

**Full URL**

```
https://api.predictbase.app/mint-shares-for-user
```

***

#### Authentication

This endpoint requires **authentication**. You must include your **API key** in the request headers:

```
x-api-key: YOUR_API_KEY
```

***

#### Request Body

```json
{
  "marketId": 12001,
  "user" : "0xd...",
  "amount" : 100  // Amount in USDC (e.g. $100)
}
```

***

#### Field Notes

* **`marketId`**\
  The ID of the market you want to mint shares for.
* **`user`**\
  The user’s wallet address.
* **`amount`**\
  The amount in USDC (e.g., 100 USDC = $100).

***

#### Response (Success)

```json
{
  "success": true,
  "txHash": "0x...",
  "receipt": {
    "...": "EVM transaction receipt fields"
  }
}
```

***

#### ⚠️ Failure Cases

* Missing or invalid `x-api-key`
* API key not authorized for the `user`
* Insufficient balance to cover the **minting amount.**
* On-chain transaction failure