# Getting Connected to the P4 Books API

The P4 Books API allows you to integrate your existing systems with P4 Books. You can use the API to create and retrieve transactions, manage master data, and automate your accounting workflows.

## Authentication

To connect to the P4 Books API, you will need an API key. To obtain your API key:

1. Log in to your P4 Books account.
2. Go to **Settings** > **API**.
3. Click **Generate API Key**.
4. Copy and store the key securely — it will only be shown once.

Include your API key in the header of every request:

```
Authorization: Bearer YOUR_API_KEY
```

## Base URL

All API requests are made to:

```
https://tenantname.p4books.com/api/v1
```

Replace `tenantname` with your organization's tenant name.

## Available Endpoints

### Master Data

| Method                                   | Endpoint     | Description        |
| ---------------------------------------- | ------------ | ------------------ |
| <mark style="color:blue;">`GET`</mark>   | `/products`  | List all products  |
| <mark style="color:blue;">`GET`</mark>   | `/customers` | List all customers |
| <mark style="color:blue;">`GET`</mark>   | `/vendors`   | List all vendors   |
| <mark style="color:green;">`POST`</mark> | `/products`  | Create a product   |
| <mark style="color:green;">`POST`</mark> | `/customers` | Create a customer  |
| <mark style="color:green;">`POST`</mark> | `/vendors`   | Create a vendor    |

### Transactions

| Method                                   | Endpoint           | Description              |
| ---------------------------------------- | ------------------ | ------------------------ |
| <mark style="color:blue;">`GET`</mark>   | `/invoices`        | List all invoices        |
| <mark style="color:blue;">`GET`</mark>   | `/purchase-orders` | List all purchase orders |
| <mark style="color:blue;">`GET`</mark>   | `/sales-orders`    | List all sales orders    |
| <mark style="color:green;">`POST`</mark> | `/invoices`        | Create an invoice        |
| <mark style="color:green;">`POST`</mark> | `/purchase-orders` | Create a purchase order  |

## Example Request

```bash
curl -X GET https://tenantname.p4books.com/api/v1/products \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"
```

## Example Response

```json
{
  "data": [
    {
      "id": 1,
      "code": "PROD-001",
      "name": "Widget A",
      "price": 25.00,
      "tax_code": "ITBMS",
      "status": "active"
    }
  ],
  "total": 1,
  "page": 1
}
```

## Rate Limits

API requests are limited to **100 requests per minute** per API key. If you exceed this limit, you will receive a `429 Too Many Requests` response.

{% hint style="info" %}
For assistance with the API or to request access to additional endpoints, contact P4 Books support or your local distributor.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.p4.software/english-1/p4-books-api/getting-connected-to-the-p4-books-api.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.