Getting Started

This documentation covers use of the REST API.
Examples of API usage, in a variety of programming languages, can be found in the BookStack api-scripts repo on GitHub.

Some alternative options for extension and customization can be found below:

• Webhooks - HTTP POST calls upon events occurring in BookStack.
• Visual Theme System - Methods to override views, translations and icons within BookStack.
• Logical Theme System - Methods to extend back-end functionality within BookStack.

Authentication

To access the API a user has to have the "Access System API" permission enabled on one of their assigned roles. Permissions to content accessed via the API is limited by the roles & permissions assigned to the user that's used to access the API.

Authentication to use the API is primarily done using API Tokens. Once the "Access System API" permission has been assigned to a user, a "API Tokens" section should be visible when editing their user profile. Choose "Create Token" and enter an appropriate name and expiry date, relevant for your API usage then press "Save". A "Token ID" and "Token Secret" will be immediately displayed. These values should be used as a header in API HTTP requests in the following format:

Authorization: Token <token_id>:<token_secret>

Here's an example of an authorized cURL request to list books in the system:

curl --request GET \
  --url https://example.com/api/books \
  --header 'Authorization: Token C6mdvEQTGnebsmVn3sFNeeuelGEBjyQp:NOvD3VlzuSVuBPNaf1xWHmy7nIRlaj22'

If already logged into the system within the browser, via a user account with permission to access the API, the system will also accept an existing session meaning you can browse API endpoints directly in the browser or use the browser devtools to play with the API.

Request Format

For endpoints in this documentation that accept data a "Body Parameters" table will be available to show the parameters that are accepted in the request. Any rules for the values of such parameters, such as the data-type or if they're required, will be shown alongside the parameter name.

The API can accept request data in the following Content-Type formats:

• application/json
• application/x-www-form-urlencoded*
• multipart/form-data*

* Form requests currently only work for POST requests due to how PHP handles request data. If you need to use these formats for PUT or DELETE requests you can work around this limitation by using a POST request and providing a "_method" parameter with the value equal to PUT or DELETE.

Regardless of format chosen, ensure you set a Content-Type header on requests so that the system can correctly parse your request data. The API is primarily designed to be interfaced using JSON, since responses are always in JSON format, hence examples in this documentation will be shown as JSON. Some endpoints, such as those that receive file data, may require the use of multipart/form-data. This will be mentioned within the description for such endpoints.

Some data may be expected in a more complex nested structure such as a nested object or array. These can be sent in non-JSON request formats using square brackets to denote index keys or property names. Below is an example of a JSON request body data and it's equivalent x-www-form-urlencoded representation.

JSON

{
  "name": "My new item",
  "books": [105, 263],
  "tags": [{"name": "Tag Name", "value": "Tag Value"}],
}

x-www-form-urlencoded

name=My%20new%20item&books%5B0%5D=105&books%5B1%5D=263&tags%5B0%5D%5Bname%5D=Tag%20Name&tags%5B0%5D%5Bvalue%5D=Tag%20Value

x-www-form-urlencoded (Decoded for readability)

name=My new item
books[0]=105
books[1]=263
tags[0][name]=Tag Name
tags[0][value]=Tag Value

Listing Endpoints

Some endpoints will return a list of data models. These endpoints will return an array of the model data under a data property along with a numeric total property to indicate the total number of records found for the query within the system. Here's an example of a listing response:

{
  "data": [
    {
      "id": 1,
      "name": "BookStack User Guide",
      "slug": "bookstack-user-guide",
      "description": "This is a general guide on using BookStack on a day-to-day basis.",
      "created_at": "2019-05-05 21:48:46",
      "updated_at": "2019-12-11 20:57:31",
      "created_by": 1,
      "updated_by": 1,
      "image_id": 3
    }
  ],
  "total": 16
}

There are a number of standard URL parameters that can be supplied to manipulate and page through the results returned from a listing endpoint:

Error Handling

Successful responses will return a 200 or 204 HTTP response code. Errors will return a 4xx or a 5xx HTTP response code depending on the type of error. Errors follow a standard format as shown below. The message provided may be translated depending on the configured language of the system in addition to the API users' language preference. The code provided in the JSON response will match the HTTP response code.

{
	"error": {
		"code": 401,
		"message": "No authorization token found on the request"
	}
}

Rate Limits

The API has built-in per-user rate-limiting to prevent potential abuse using the API. By default, this is set to 180 requests per minute but this can be changed by an administrator by setting an "API_REQUESTS_PER_MIN" .env option like so:

# The number of API requests that can be made per minute by a single user.
API_REQUESTS_PER_MIN=180

When the limit is reached you will receive a 429 "Too Many Attempts." error response. It's generally good practice to limit requests made from your API client, where possible, to avoid affecting normal use of the system caused by over-consuming system resources. Keep in mind there may be other rate-limiting factors such as web-server & firewall controls.

Content Security

Many of the available endpoints will return content that has been provided by user input. Some of this content may be provided in a certain data-format (Such as HTML or Markdown for page content). Such content is not guaranteed to be safe so keep security in mind when dealing with such user-input. In some cases, the system will apply some filtering to content in an attempt to prevent certain vulnerabilities, but this is not assured to be a bullet-proof defence.

Within its own interfaces, unless disabled, the system makes use of Content Security Policy (CSP) rules to heavily negate cross-site scripting vulnerabilities from user content. If displaying user content externally, it's advised you also use defences such as CSP or the disabling of JavaScript completely.