CRUD routes


Where Mockoon routes are independent and stateless, CRUD routes can generate multiple endpoints to perform CRUD operations (Create, Read, Update, Delete) on data buckets. Data buckets are generated when the server start, their state persisting between calls. It makes them the perfect tool to simulate small databases.

A CRUD endpoint will automatically create a series of routes during runtime, allowing you to perform actions on your data bucket. A typical example is an array of resources (users, invoices, etc.) you can update through a PUT request and see the result in a subsequent GET request.

To create a CRUD route, click on the "CRUD route" entry in the add route menu:

Add a new CRUD route

Then, set its path, usually a resource name:

Set the CRUD route path

After creating a CRUD endpoint, you need to link it to a data bucket:

Link a data bucket to a CRUD route

 Supported content

The CRUD route will work with any content stored in your data bucket: valid JSON in the form of an array of objects, an object, a primitive, etc., or any non-valid JSON. The route behaviors will vary depending on the content stored in the bucket (see table below).

 Resetting the data bucket content

The data bucket content is generated when the server starts, and its state persists between calls. However, its state will not be saved in the data file, and you can reset it to its initial state by restarting the mock API.

 CRUD route differences

When creating a CRUD route, you may notice some differences in the interface, namely:

  • The route HTTP method cannot be set and will be handled automatically.
  • The status code cannot be changed and will be set automatically while performing operations.
  • A fixed and default route response is automatically created and must be linked to a data bucket in order to perform CRUD operations.

Latency and custom headers can still be added. However, an application/json Content-Type will be forced when appropriate.

Also, CRUD routes are still compatible with creating multiple responses and rules. The major difference is that the default route response cannot be set and will always be the first one linked to the data bucket. This response cannot be deleted nor reordered. Aside from these differences everything else still applies.

 List of routes and operations

Mockoon will automatically translate a CRUD endpoint to multiple routes allowing for a wide range of behaviors. The system is very flexible and allows for any content, storing and updating primitives to simulate a flag or environment variable system, updating and sorting an array of objects, etc.

Array of objectsArray of primitives (id parameter is acting like an index)Object, primitive or non-valid JSON
GET/resourcesReturns the entire array *Returns the entire array *Returns the content
GET/resources/:idReturns an object by its id propertyReturns an item by its indexReturns the content
POST/resourcesInserts a new object in the array (autogenerate the id (UUID) if not provided)Inserts a new item in the arrayOverwrites the content
PUT/resourcesReplaces the whole data bucket contentReplaces the whole data bucket contentOverwrites the content
PUT/resources/:idPerforms a full object update by its id (replace)Replaces the item at indexOverwrites the content
PATCH/resourcesConcatenates the arraysConcatenates the arraysOverwrites the content (merge if objects)
PATCH/resources/:idPerforms a partial object update by its id (merge)Replaces the item at indexOverwrites the content (merge if objects)
DELETE/resourcesDeletes the data bucket contentDeletes the data bucket contentDeletes the content
DELETE/resources/:idDeletes an object by its idDeletes an item at indexDeletes the content

* Supports filtering, sorting and pagination

 Customizing the "id" property

By default, CRUD endpoints will use the id property to identify objects in an array in all the routes manipulating a single resource (e.g. GET /resource/:id). However, you can change this property to anything you want, like uuid, custom_id, etc:

Customize the CRUD id property

 Overriding a route

You can easily override a CRUD operation route by declaring a regular HTTP route and putting it above the CRUD route (see routes order). This route will intercept the request allowing you to serve custom content for this operation.

 Filtering, sorting and pagination on the main GET route

The main GET /path route supports filtering, sorting and pagination when working with an array.


To filter an array, you can use query parameters in the form [property]_[operator]. For instance, if you want to filter an array of objects by their status property, you can use:

GET /path?status_eq=success

Currently, the following operators are supported:

eqFilters by equalitystatus_eq=success
neFilters by inequalitystatus_ne=error
gtFilters by greaterprice_gt=10
gteFilters by greater or equalprice_gte=10
ltFilters by lowerprice_lt=10
lteFilters by lower or equalprice_lte=10
likeFilters by partial match *name_like=ohn do
startFilters properties that start with a value *name_start=john
endFilters properties that end with a value *name_end=doe

* Case insensitive

Filters work on every primitive value (strings, numbers, booleans, etc.), so you can filter by true or false values, or even null values:

GET /path?is_active_eq=true

It also works on arrays of primitives, in which case using _[operator] is enough:

GET /path?_gte=10

Moreover, nesting is supported:

GET /[email protected]

The like, start and end operators support regex patterns:

GET /path?user.name_like=^john
GET /path?user.id_like=^(123|456|789)$


To search an array, you can use the search query parameter. Search is a special kind of filter that will look for a partial match in any values (with nesting) in the array. For instance, if you want to search for john in an array of users, you can use:

GET /path?search=john


To sort an array, you can use the sort and order query parameters. You can sort by any property in the objects (strings or numbers) and order by either ascending or descending order:

GET /path?sort=name&order=desc

Sorting is also working on arrays of primitives (strings, numbers, etc.), in which case, the presence of the sort parameter is enough:

GET /path?sort&order=asc


To paginate an array, you can use the page and limit query parameters. If you omit the limit parameter, it will default to 10 per page. If you omit the page parameter, it will show you the first x items.


  • second set of 25 items:

    GET /path?page=2&limit=25
  • first 50 items:

    GET /path?limit=50
  • second set of 10 items:

    GET /path?page=2

Filtering, sorting and pagination can work together and are applied in the order: filtering / searching, sorting, pagination.

GET /path?search=j&[email protected]&sort=name&page=2&limit=25

 Meta data

When using CRUD endpoints, you can access meta data about the data bucket content through response headers:

  • X-Total-Count: total number of items in the bucket
  • X-Filtered-Count: number of items after filtering (not taking into account pagination)