# POST /products/:id/costs

**Resource:** [Products](./products.md)  
**Scopes:** `products:write`  
**Write operation:** yes

Create a cost entry for a product.

## Parameters

| Name | In | Type | Required | Description |
|------|----|------|----------|-------------|
| `id` | path | uuid | yes | Product ID |
| `label` | body | string | no | Cost label |
| `cost_price` | body | number | no | Cost price |
| `quantity` | body | number | no | Quantity |
| `supplier_id` | body | uuid | no | Supplier customer ID |
| `supplier_product_id` | body | uuid | no | Supplier product ID |

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Base URL: `https://api.trustpager.com/functions/v1/api/v1` — Auth: `Authorization: Bearer YOUR_API_KEY`