REST API Overview

What is a REST API?

REST stands for representational state transfer. It's a particular type of API which employs HTTP requests and JavaScript Object Notation (JSON) to facilitate create, retrieve, update, and delete (CRUD) operations on objects within an application. Each type of operation is associated with a particular HTTP verb:

GET: Retrieve an object or list of objects
POST: Create an object
PUT / PATCH: Modify an existing object. PUT requires all mandatory fields to be specified, while PATCH only expects the field that is being modified to be specified.
DELETE: Delete an existing object

Additionally, the OPTIONS verb can be used to inspect a particular REST API endpoint and return all supported actions and their available parameters.

One of the primary benefits of a REST API is its human-friendliness. Because it utilizes HTTP and JSON, it's very easy to interact with NetBox data on the command line using common tools. For example, we can request an IP address from NetBox and output the JSON using curl and jq. The following command makes an HTTP GET request for information about a particular IP address, identified by its primary key, and uses jq to present the raw JSON data returned in a more human-friendly format. (Piping the output through jq isn't strictly required but makes it much easier to read.)

curl -s http://netbox/api/ipam/ip-addresses/2954/ | jq '.'

{
  "id": 2954,
  "url": "http://netbox/api/ipam/ip-addresses/2954/",
  "family": {
    "value": 4,
    "label": "IPv4"
  },
  "address": "192.168.0.42/26",
  "vrf": null,
  "tenant": null,
  "status": {
    "value": "active",
    "label": "Active"
  },
  "role": null,
  "assigned_object_type": "dcim.interface",
  "assigned_object_id": 114771,
  "assigned_object": {
    "id": 114771,
    "url": "http://netbox/api/dcim/interfaces/114771/",
    "device": {
      "id": 2230,
      "url": "http://netbox/api/dcim/devices/2230/",
      "name": "router1",
      "display_name": "router1"
    },
    "name": "et-0/1/2",
    "cable": null,
    "connection_status": null
  },
  "nat_inside": null,
  "nat_outside": null,
  "dns_name": "",
  "description": "Example IP address",
  "tags": [],
  "custom_fields": {},
  "created": "2020-08-04",
  "last_updated": "2020-08-04T14:12:39.666885Z"
}

Each attribute of the IP address is expressed as an attribute of the JSON object. Fields may include their own nested objects, as in the case of the assigned_object field above. Every object includes a primary key named id which uniquely identifies it in the database.

Interactive Documentation

Comprehensive, interactive documentation of all REST API endpoints is available on a running NetBox instance at /api/schema/swagger-ui/. This interface provides a convenient sandbox for researching and experimenting with specific endpoints and request types. The API itself can also be explored using a web browser by navigating to its root at /api/.

Endpoint Hierarchy

NetBox's entire REST API is housed under the API root at https://<hostname>/api/. The URL structure is divided at the root level by application: circuits, DCIM, extras, IPAM, plugins, tenancy, users, and virtualization. Within each application exists a separate path for each model. For example, the provider and circuit objects are located under the "circuits" application:

/api/circuits/providers/
/api/circuits/circuits/

Likewise, the site, rack, and device objects are located under the "DCIM" application:

/api/dcim/sites/
/api/dcim/racks/
/api/dcim/devices/

The full hierarchy of available endpoints can be viewed by navigating to the API root in a web browser.

Each model generally has two views associated with it: a list view and a detail view. The list view is used to retrieve a list of multiple objects and to create new objects. The detail view is used to retrieve, update, or delete an single existing object. All objects are referenced by their numeric primary key (id).

/api/dcim/devices/ - List existing devices or create a new device
/api/dcim/devices/123/ - Retrieve, update, or delete the device with ID 123

Lists of objects can be filtered using a set of query parameters. For example, to find all interfaces belonging to the device with ID 123:

GET /api/dcim/interfaces/?device_id=123

See the filtering documentation for more details.

Serialization

The REST API employs two types of serializers to represent model data: base serializers and nested serializers. The base serializer is used to present the complete view of a model. This includes all database table fields which comprise the model, and may include additional metadata. A base serializer includes relationships to parent objects, but does not include child objects. For example, the VLANSerializer includes a nested representation its parent VLANGroup (if any), but does not include any assigned Prefixes.

{
    "id": 1048,
    "site": {
        "id": 7,
        "url": "http://netbox/api/dcim/sites/7/",
        "name": "Corporate HQ",
        "slug": "corporate-hq"
    },
    "group": {
        "id": 4,
        "url": "http://netbox/api/ipam/vlan-groups/4/",
        "name": "Production",
        "slug": "production"
    },
    "vid": 101,
    "name": "Users-Floor1",
    "tenant": null,
    "status": {
        "value": 1,
        "label": "Active"
    },
    "role": {
        "id": 9,
        "url": "http://netbox/api/ipam/roles/9/",
        "name": "User Access",
        "slug": "user-access"
    },
    "description": "",
    "display_name": "101 (Users-Floor1)",
    "custom_fields": {}
}

Related objects (e.g. ForeignKey fields) are represented using nested serializers. A nested serializer provides a minimal representation of an object, including only its direct URL and enough information to display the object to a user. When performing write API actions (POST, PUT, and PATCH), related objects may be specified by either numeric ID (primary key), or by a set of attributes sufficiently unique to return the desired object.

For example, when creating a new device, its rack can be specified by NetBox ID (PK):

{
    "name": "MyNewDevice",
    "rack": 123,
    ...
}

Or by a set of nested attributes which uniquely identify the rack:

{
    "name": "MyNewDevice",
    "rack": {
        "site": {
            "name": "Equinix DC6"
        },
        "name": "R204"
    },
    ...
}

Note that if the provided parameters do not return exactly one object, a validation error is raised.

Generic Relations

Some objects within NetBox have attributes which can reference an object of multiple types, known as generic relations. For example, an IP address can be assigned to either a device interface or a virtual machine interface. When making this assignment via the REST API, we must specify two attributes:

assigned_object_type - The content type of the assigned object, defined as <app>.<model>
assigned_object_id - The assigned object's unique numeric ID

Together, these values identify a unique object in NetBox. The assigned object (if any) is represented by the assigned_object attribute on the IP address model.

curl -X POST \
-H "Authorization: Token $TOKEN" \
-H "Content-Type: application/json" \
-H "Accept: application/json; indent=4" \
http://netbox/api/ipam/ip-addresses/ \
--data '{
    "address": "192.0.2.1/24",
    "assigned_object_type": "dcim.interface",
    "assigned_object_id": 69023
}'

{
    "id": 56296,
    "url": "http://netbox/api/ipam/ip-addresses/56296/",
    "assigned_object_type": "dcim.interface",
    "assigned_object_id": 69000,
    "assigned_object": {
        "id": 69000,
        "url": "http://netbox/api/dcim/interfaces/69023/",
        "device": {
            "id": 2174,
            "url": "http://netbox/api/dcim/devices/2174/",
            "name": "device105",
            "display_name": "device105"
        },
        "name": "ge-0/0/0",
        "cable": null,
        "connection_status": null
    },
    ...
}

If we wanted to assign this IP address to a virtual machine interface instead, we would have set assigned_object_type to virtualization.vminterface and updated the object ID appropriately.

Brief Format

Most API endpoints support an optional "brief" format, which returns only a minimal representation of each object in the response. This is useful when you need only a list of available objects without any related data, such as when populating a drop-down list in a form. As an example, the default (complete) format of an IP address looks like this:

GET /api/ipam/prefixes/13980/

{
    "id": 13980,
    "url": "http://netbox/api/ipam/prefixes/13980/",
    "family": {
        "value": 4,
        "label": "IPv4"
    },
    "prefix": "192.0.2.0/24",
    "site": {
        "id": 3,
        "url": "http://netbox/api/dcim/sites/17/",
        "name": "Site 23A",
        "slug": "site-23a"
    },
    "vrf": null,
    "tenant": null,
    "vlan": null,
    "status": {
        "value": "container",
        "label": "Container"
    },
    "role": {
        "id": 17,
        "url": "http://netbox/api/ipam/roles/17/",
        "name": "Staging",
        "slug": "staging"
    },
    "is_pool": false,
    "description": "Example prefix",
    "tags": [],
    "custom_fields": {},
    "created": "2018-12-10",
    "last_updated": "2019-03-01T20:02:46.173540Z"
}

The brief format is much more terse:

GET /api/ipam/prefixes/13980/?brief=1

{
    "id": 13980,
    "url": "http://netbox/api/ipam/prefixes/13980/",
    "family": 4,
    "prefix": "10.40.3.0/24"
}

The brief format is supported for both lists and individual objects.

Excluding Config Contexts

When retrieving devices and virtual machines via the REST API, each will include its rendered configuration context data by default. Users with large amounts of context data will likely observe suboptimal performance when returning multiple objects, particularly with very high page sizes. To combat this, context data may be excluded from the response data by attaching the query parameter ?exclude=config_context to the request. This parameter works for both list and detail views.

Pagination

API responses which contain a list of many objects will be paginated for efficiency. The root JSON object returned by a list endpoint contains the following attributes:

count: The total number of all objects matching the query
next: A hyperlink to the next page of results (if applicable)
previous: A hyperlink to the previous page of results (if applicable)
results: The list of objects on the current page

Here is an example of a paginated response:

HTTP 200 OK
Allow: GET, POST, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "count": 2861,
    "next": "http://netbox/api/dcim/devices/?limit=50&offset=50",
    "previous": null,
    "results": [
        {
            "id": 231,
            "name": "Device1",
            ...
        },
        {
            "id": 232,
            "name": "Device2",
            ...
        },
        ...
    ]
}

The default page is determined by the PAGINATE_COUNT configuration parameter, which defaults to 50. However, this can be overridden per request by specifying the desired offset and limit query parameters. For example, if you wish to retrieve a hundred devices at a time, you would make a request for:

http://netbox/api/dcim/devices/?limit=100

The response will return devices 1 through 100. The URL provided in the next attribute of the response will return devices 101 through 200:

{
    "count": 2861,
    "next": "http://netbox/api/dcim/devices/?limit=100&offset=100",
    "previous": null,
    "results": [...]
}

The maximum number of objects that can be returned is limited by the MAX_PAGE_SIZE configuration parameter, which is 1000 by default. Setting this to 0 or None will remove the maximum limit. An API consumer can then pass ?limit=0 to retrieve all matching objects with a single request.

Warning

Disabling the page size limit introduces a potential for very resource-intensive requests, since one API request can effectively retrieve an entire table from the database.

Interacting with Objects

Retrieving Multiple Objects

To query NetBox for a list of objects, make a GET request to the model's list endpoint. Objects are listed under the response object's results parameter.

curl -s -X GET http://netbox/api/ipam/ip-addresses/ | jq '.'

{
  "count": 42031,
  "next": "http://netbox/api/ipam/ip-addresses/?limit=50&offset=50",
  "previous": null,
  "results": [
    {
      "id": 5618,
      "address": "192.0.2.1/24",
      ...
    },
    {
      "id": 5619,
      "address": "192.0.2.2/24",
      ...
    },
    {
      "id": 5620,
      "address": "192.0.2.3/24",
      ...
    },
    ...
  ]
}

Retrieving a Single Object

To query NetBox for a single object, make a GET request to the model's detail endpoint specifying its unique numeric ID.

Note

Note that the trailing slash is required. Omitting this will return a 302 redirect.

curl -s -X GET http://netbox/api/ipam/ip-addresses/5618/ | jq '.'

{
  "id": 5618,
  "address": "192.0.2.1/24",
  ...
}

Creating a New Object

To create a new object, make a POST request to the model's list endpoint with JSON data pertaining to the object being created. Note that a REST API token is required for all write operations; see the authentication section for more information. Also be sure to set the Content-Type HTTP header to application/json.

curl -s -X POST \
-H "Authorization: Token $TOKEN" \
-H "Content-Type: application/json" \
http://netbox/api/ipam/prefixes/ \
--data '{"prefix": "192.0.2.0/24", "site": 6}' | jq '.'

{
  "id": 18691,
  "url": "http://netbox/api/ipam/prefixes/18691/",
  "family": {
    "value": 4,
    "label": "IPv4"
  },
  "prefix": "192.0.2.0/24",
  "site": {
    "id": 6,
    "url": "http://netbox/api/dcim/sites/6/",
    "name": "US-East 4",
    "slug": "us-east-4"
  },
  "vrf": null,
  "tenant": null,
  "vlan": null,
  "status": {
    "value": "active",
    "label": "Active"
  },
  "role": null,
  "is_pool": false,
  "description": "",
  "tags": [],
  "custom_fields": {},
  "created": "2020-08-04",
  "last_updated": "2020-08-04T20:08:39.007125Z"
}

Creating Multiple Objects

To create multiple instances of a model using a single request, make a POST request to the model's list endpoint with a list of JSON objects representing each instance to be created. If successful, the response will contain a list of the newly created instances. The example below illustrates the creation of three new sites.

curl -X POST -H "Authorization: Token $TOKEN" \
-H "Content-Type: application/json" \
-H "Accept: application/json; indent=4" \
http://netbox/api/dcim/sites/ \
--data '[
{"name": "Site 1", "slug": "site-1", "region": {"name": "United States"}},
{"name": "Site 2", "slug": "site-2", "region": {"name": "United States"}},
{"name": "Site 3", "slug": "site-3", "region": {"name": "United States"}}
]'

[
    {
        "id": 21,
        "url": "http://netbox/api/dcim/sites/21/",
        "name": "Site 1",
        ...
    },
    {
        "id": 22,
        "url": "http://netbox/api/dcim/sites/22/",
        "name": "Site 2",
        ...
    },
    {
        "id": 23,
        "url": "http://netbox/api/dcim/sites/23/",
        "name": "Site 3",
        ...
    }
]

Updating an Object

To modify an object which has already been created, make a PATCH request to the model's detail endpoint specifying its unique numeric ID. Include any data which you wish to update on the object. As with object creation, the Authorization and Content-Type headers must also be specified.

curl -s -X PATCH \
-H "Authorization: Token $TOKEN" \
-H "Content-Type: application/json" \
http://netbox/api/ipam/prefixes/18691/ \
--data '{"status": "reserved"}' | jq '.'

{
  "id": 18691,
  "url": "http://netbox/api/ipam/prefixes/18691/",
  "family": {
    "value": 4,
    "label": "IPv4"
  },
  "prefix": "192.0.2.0/24",
  "site": {
    "id": 6,
    "url": "http://netbox/api/dcim/sites/6/",
    "name": "US-East 4",
    "slug": "us-east-4"
  },
  "vrf": null,
  "tenant": null,
  "vlan": null,
  "status": {
    "value": "reserved",
    "label": "Reserved"
  },
  "role": null,
  "is_pool": false,
  "description": "",
  "tags": [],
  "custom_fields": {},
  "created": "2020-08-04",
  "last_updated": "2020-08-04T20:14:55.709430Z"
}

PUT versus PATCH

The NetBox REST API support the use of either PUT or PATCH to modify an existing object. The difference is that a PUT request requires the user to specify a complete representation of the object being modified, whereas a PATCH request need include only the attributes that are being updated. For most purposes, using PATCH is recommended.

Updating Multiple Objects

Multiple objects can be updated simultaneously by issuing a PUT or PATCH request to a model's list endpoint with a list of dictionaries specifying the numeric ID of each object to be deleted and the attributes to be updated. For example, to update sites with IDs 10 and 11 to a status of "active", issue the following request:

curl -s -X PATCH \
-H "Authorization: Token $TOKEN" \
-H "Content-Type: application/json" \
http://netbox/api/dcim/sites/ \
--data '[{"id": 10, "status": "active"}, {"id": 11, "status": "active"}]'

Note that there is no requirement for the attributes to be identical among objects. For instance, it's possible to update the status of one site along with the name of another in the same request.

Note

The bulk update of objects is an all-or-none operation, meaning that if NetBox fails to successfully update any of the specified objects (e.g. due a validation error), the entire operation will be aborted and none of the objects will be updated.

Deleting an Object

To delete an object from NetBox, make a DELETE request to the model's detail endpoint specifying its unique numeric ID. The Authorization header must be included to specify an authorization token, however this type of request does not support passing any data in the body.

curl -s -X DELETE \
-H "Authorization: Token $TOKEN" \
http://netbox/api/ipam/prefixes/18691/

Note that DELETE requests do not return any data: If successful, the API will return a 204 (No Content) response.

Note

You can run curl with the verbose (-v) flag to inspect the HTTP response codes.

Deleting Multiple Objects

NetBox supports the simultaneous deletion of multiple objects of the same type by issuing a DELETE request to the model's list endpoint with a list of dictionaries specifying the numeric ID of each object to be deleted. For example, to delete sites with IDs 10, 11, and 12, issue the following request:

curl -s -X DELETE \
-H "Authorization: Token $TOKEN" \
-H "Content-Type: application/json" \
http://netbox/api/dcim/sites/ \
--data '[{"id": 10}, {"id": 11}, {"id": 12}]'

Note

The bulk deletion of objects is an all-or-none operation, meaning that if NetBox fails to delete any of the specified objects (e.g. due a dependency by a related object), the entire operation will be aborted and none of the objects will be deleted.

Authentication

The NetBox REST API primarily employs token-based authentication. For convenience, cookie-based authentication can also be used when navigating the browsable API.

Tokens

A token is a unique identifier mapped to a NetBox user account. Each user may have one or more tokens which he or she can use for authentication when making REST API requests. To create a token, navigate to the API tokens page under your user profile.

By default, all users can create and manage their own REST API tokens under the user control panel in the UI or via the REST API. This ability can be disabled by overriding the DEFAULT_PERMISSIONS configuration parameter.

Each token contains a 160-bit key represented as 40 hexadecimal characters. When creating a token, you'll typically leave the key field blank so that a random key will be automatically generated. However, NetBox allows you to specify a key in case you need to restore a previously deleted token to operation.

Additionally, a token can be set to expire at a specific time. This can be useful if an external client needs to be granted temporary access to NetBox.

Restricting Token Retrieval

The ability to retrieve the key value of a previously-created API token can be restricted by disabling the ALLOW_TOKEN_RETRIEVAL configuration parameter.

Restricting Write Operations

By default, a token can be used to perform all actions via the API that a user would be permitted to do via the web UI. Deselecting the "write enabled" option will restrict API requests made with the token to read operations (e.g. GET) only.

Client IP Restriction

Each API token can optionally be restricted by client IP address. If one or more allowed IP prefixes/addresses is defined for a token, authentication will fail for any client connecting from an IP address outside the defined range(s). This enables restricting the use a token to a specific client. (By default, any client IP address is permitted.)

Creating Tokens for Other Users

It is possible to provision authentication tokens for other users via the REST API. To do, so the requesting user must have the users.grant_token permission assigned. While all users have inherent permission by default to create their own tokens, this permission is required to enable the creation of tokens for other users.

Exercise Caution

The ability to create tokens on behalf of other users enables the requestor to access the created token. This ability is intended e.g. for the provisioning of tokens by automated services, and should be used with extreme caution to avoid a security compromise.

Authenticating to the API

An authentication token is attached to a request by setting the Authorization header to the string Token followed by a space and the user's token:

$ curl -H "Authorization: Token $TOKEN" \
-H "Accept: application/json; indent=4" \
https://netbox/api/dcim/sites/
{
    "count": 10,
    "next": null,
    "previous": null,
    "results": [...]
}

A token is not required for read-only operations which have been exempted from permissions enforcement (using the EXEMPT_VIEW_PERMISSIONS configuration parameter). However, if a token is required but not present in a request, the API will return a 403 (Forbidden) response:

$ curl https://netbox/api/dcim/sites/
{
    "detail": "Authentication credentials were not provided."
}

When a token is used to authenticate a request, its last_updated time updated to the current time if its last use was recorded more than 60 seconds ago (or was never recorded). This allows users to determine which tokens have been active recently.

Note

The "last used" time for tokens will not be updated while maintenance mode is enabled.

Initial Token Provisioning

Ideally, each user should provision his or her own API token(s) via the web UI. However, you may encounter a scenario where a token must be created by a user via the REST API itself. NetBox provides a special endpoint to provision tokens using a valid username and password combination. (Note that the user must have permission to create API tokens regardless of the interface used.)

To provision a token via the REST API, make a POST request to the /api/users/tokens/provision/ endpoint:

$ curl -X POST \
-H "Content-Type: application/json" \
-H "Accept: application/json; indent=4" \
https://netbox/api/users/tokens/provision/ \
--data '{
    "username": "hankhill",
    "password": "I<3C3H8"
}'

Note that we are not passing an existing REST API token with this request. If the supplied credentials are valid, a new REST API token will be automatically created for the user. Note that the key will be automatically generated, and write ability will be enabled.

{
    "id": 6,
    "url": "https://netbox/api/users/tokens/6/",
    "display": "3c9cb9 (hankhill)",
    "user": {
        "id": 2,
        "url": "https://netbox/api/users/users/2/",
        "display": "hankhill",
        "username": "hankhill"
    },
    "created": "2021-06-11T20:09:13.339367Z",
    "expires": null,
    "key": "9fc9b897abec9ada2da6aec9dbc34596293c9cb9",
    "write_enabled": true,
    "description": ""
}

HTTP Headers

`API-Version`

This header specifies the API version in use. This will always match the version of NetBox installed. For example, NetBox v3.4.2 will report an API version of 3.4.

`X-Request-ID`

This header specifies the unique ID assigned to the received API request. It can be very handy for correlating a request with change records. For example, after creating several new objects, you can filter against the object changes API endpoint to retrieve the resulting change records:

GET /api/extras/object-changes/?request_id=e39c84bc-f169-4d5f-bc1c-94487a1b18b5

The request ID can also be used to filter many objects directly, to return those created or updated by a certain request:

GET /api/dcim/sites/?created_by_request=e39c84bc-f169-4d5f-bc1c-94487a1b18b5

Note

This header is included with all NetBox responses, although it is most practical when working with an API.

REST API Overview

What is a REST API?

Interactive Documentation

Endpoint Hierarchy

Serialization

Related Objects

Generic Relations

Brief Format

Excluding Config Contexts

Pagination

Interacting with Objects

Retrieving Multiple Objects

Retrieving a Single Object

Creating a New Object

Creating Multiple Objects

Updating an Object

Updating Multiple Objects

Deleting an Object

Deleting Multiple Objects

Authentication

Tokens

Restricting Write Operations

Client IP Restriction

Creating Tokens for Other Users

Authenticating to the API

Initial Token Provisioning

HTTP Headers

API-Version

X-Request-ID

`API-Version`

`X-Request-ID`