Experiment Management API Flag Endpoints

Name	Description
List	List of flags including their configuration details.
Get details	Get the configuration details of a flag.
List versions	List all versions for a flag.
Get version details	Get a specific version for a flag.
List variants	List all variants for a flag.
Get variant details	Get a specific variant for a flag.
Get variant inclusions	Get all inclusions (users) for a variant.
Create variant	Create a new variant for a flag.
Edit variant	Edit a variant for a flag.
Remove variant	Remove a variant from a flag.
Add users to variant	Add users to flag's variant.
Remove users from variant	Remove users from flag's variant.
Remove all users from variant	Remove all users from flag's variant.
Bulk remove users from variant	Bulk remove users from experiment's variant.
List deployments	List all deployments for a flag.
Create deployment	Add a deployment for a flag.
Remove deployment	Remove a deployment from a flag.
Edit	Edit flag.
Create	Create a new flag.

List

1GET https://experiment.amplitude.com/api/1/flags

Fetch a list of flags including their configuration details. Results are ordered with the most recently created items first.

Query parameters

Name	Description
`limit`	The max number of flags to be returned. Capped at 1000.
`cursor`	The offset to start the "page" of results from.

Response

A successful request returns a 200 OK response and a list of flags encoded as JSON in the response body. createdAt and lastModifiedAt are in UTC in ISO 8601 format.

1curl --request GET \
2--url 'https://experiment.amplitude.com/api/1/flags?limit=1000' \
3--header 'Accept: application/json' \
4--header 'Authorization: Bearer <management-api-key>'

 1{
 2    "flags": [
 3        {
 4            "id": <id>,
 5            "projectId": <projectId>,
 6            "deployments": [<deploymentId>],
 7            "key": "flag-key",
 8            "name": "flag-name",
 9            "description": "description",
10            "enabled": false,
11            "evaluationMode": "remote",
12            "bucketingKey": "amplitude_id",
13            "bucketingSalt": <bucketingSalt>,
14            "bucketingUnit": "User",
15            "createdBy": "abc@amplitude.com",
16            "lastModifiedBy": "abc@amplitude.com",
17            "createdAt":"2022-09-09T15:29:47.940Z",
18            "lastModifiedAt":"2023-01-25T11:43:41.073Z"
19            "variants": [
20                {
21                    "key": "on"
22                }
23            ],
24            "rolloutPercentage": 0,
25            "rolloutWeights": {
26                "on": 1
27            },
28            "targetSegments": [
29                {
30                    "name": "Segment 1",
31                    "conditions": [
32                        {
33                            "prop": "city",
34                            "op": "is",
35                            "type": "property",
36                            "values": []
37                        }
38                    ],
39                    "percentage": 0,
40                    "bucketingKey": "amplitude_id",
41                    "rolloutWeights": {
42                        "on": 1
43                    }
44                }
45            ]
46        }
47    ],
48    "nextCursor": <cursorId>
49}

Get details

1GET https://experiment.amplitude.com/api/1/flags/<id>

Fetch the configuration details of a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.

Response

A successful request returns a 200 OK response and a JSON object with the flag's details.

1curl --request GET \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

 1{
 2    "id": <id>,
 3    "projectId": <projectId>,
 4    "deployments": [<deploymentId>],
 5    "key": "flag-key",
 6    "name": "flag-key",
 7    "description": "feature flag access",
 8    "enabled": true,
 9    "evaluationMode": "remote",
10    "bucketingKey": "amplitude_id",
11    "bucketingSalt": "mHdQDzeE",
12    "bucketingUnit": "User",
13    "variants": [
14        {
15            "key": "on"
16        }
17    ],
18    "rolloutPercentage": 0,
19    "rolloutWeights": {
20        "on": 1
21    },
22    "targetSegments": [
23        {
24            "name": "Segment 1",
25            "conditions": [
26                {
27                    "prop": "country",
28                    "op": "is",
29                    "type": "property",
30                    "values": [
31                        "United States"
32                    ]
33                }
34            ],
35            "percentage": 0,
36            "bucketingKey": "amplitude_id",
37            "rolloutWeights": {
38                "on": 1
39            }
40        }
41    ],
42    "deleted": false
43}

List versions

1GET https://experiment.amplitude.com/api/1/flags/{id}/versions

Fetch a list of all versions for a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.

Response

A successful request returns a 200 OK response and a list of flag's versions encoded as an array of JSON objects in the response body. Versions are sorted in a descending order.

1curl --request GET \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/versions' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

  1[
  2    {
  3        "createdAt": "2023-07-29T03:32:49.594Z",
  4        "createdBy": <userId>,
  5        "version": 3,
  6        "flagConfig": {
  7            "id": <id>,
  8            "projectId": <projectId>,
  9            "deployments": [<deploymentId>],
 10            "key": "flag-key",
 11            "name": "flag-key",
 12            "description": "feature flag access",
 13            "enabled": true,
 14            "evaluationMode": "remote",
 15            "bucketingKey": "amplitude_id",
 16            "bucketingSalt": "mHdQDzeE",
 17            "bucketingUnit": "User",
 18            "variants": [
 19                {
 20                    "key": "on"
 21                }
 22            ],
 23            "rolloutPercentage": 0,
 24            "rolloutWeights": {
 25                "on": 1
 26            },
 27            "targetSegments": [ ...
 28                {
 29                    "name": "Segment 1",
 30                    "conditions": [
 31                        {
 32                            "prop": "country",
 33                            "op": "is",
 34                            "type": "property",
 35                            "values": [
 36                                "United States"
 37                            ]
 38                        }
 39                    ],
 40                    "percentage": 0,
 41                    "bucketingKey": "amplitude_id",
 42                    "rolloutWeights": {
 43                        "on": 1
 44                    }
 45                }
 46            ]
 47        }
 48    },  
 49    {
 50        "createdAt": "2023-07-29T03:32:39.494Z",
 51        "createdBy": <userId>, ...
 52        "version": 2,
 53        "flagConfig": {
 54            "id": <id>,
 55            "projectId": <projectId>,
 56            "deployments": [<deploymentId>],
 57            "key": "flag-key",
 58            "name": "flag-key",
 59            "description": "feature flag access",
 60            "enabled": false,
 61            "evaluationMode": "remote",
 62            "bucketingKey": "amplitude_id",
 63            "bucketingSalt": "mHdQDzeE",
 64            "bucketingUnit": "User",
 65            "variants": [
 66                {
 67                    "key": "on"
 68                }
 69            ],
 70            "rolloutPercentage": 0,
 71            "rolloutWeights": {
 72                "on": 1
 73            },
 74            "targetSegments": [
 75                {
 76                    "name": "Segment 1",
 77                    "conditions": [
 78                        {
 79                            "prop": "country",
 80                            "op": "is",
 81                            "type": "property",
 82                            "values": [
 83                                "United States"
 84                            ]
 85                        }
 86                    ],
 87                    "percentage": 0,
 88                    "bucketingKey": "amplitude_id",
 89                    "rolloutWeights": {
 90                        "on": 1
 91                    }
 92                }
 93            ]
 94        }
 95    },
 96    {
 97        "createdAt": "2023-07-29T03:30:45.703Z",
 98        "createdBy": <userId>,
 99        "version": 1,
100        "flagConfig": {
101            "id": <id>,
102            "projectId": <projectId>,
103            "deployments": [],
104            "key": "flag-key",
105            "name": "flag-key",
106            "description": "",
107            "enabled": false,
108            "evaluationMode": "remote",
109            "bucketingKey": "amplitude_id",
110            "bucketingSalt": "mHdQDzeE",
111            "bucketingUnit": "User",
112            "variants": [
113                {
114                    "key": "on"
115                }
116            ],
117            "rolloutPercentage": 0,
118            "rolloutWeights": {
119                "on": 1
120            },
121            "targetSegments": []
122        }
123    }
124]

Get version details

1GET https://experiment.amplitude.com/api/1/flags/{id}/versions/{versionId}

Fetch details of a specific version of a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`versionId`	Required. String. The version's ID.

Response

A successful request returns a 200 OK response and a JSON object with details of the version.

1curl --request GET \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/versions/<versionId>' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

 1{
 2    "createdAt": "2023-07-29T03:32:49.594Z",
 3    "createdBy": <userId>,
 4    "version": 3,
 5    "flagConfig": {
 6        "id": <id>,
 7        "projectId": <projectId>,
 8        "deployments": [<deploymentId>],
 9        "key": "flag-key",
10        "name": "flag-key",
11        "description": "feature flag access",
12        "enabled": true,
13        "evaluationMode": "remote",
14        "bucketingKey": "amplitude_id",
15        "bucketingSalt": "mHdQDzeE",
16        "bucketingUnit": "User",
17        "variants": [
18            {
19                "key": "on"
20            }
21        ],
22        "rolloutPercentage": 0,
23        "rolloutWeights": {
24            "on": 1
25        },
26        "targetSegments": [
27            {
28                "name": "Segment 1",
29                "conditions": [
30                    {
31                        "prop": "country",
32                        "op": "is",
33                        "type": "property",
34                        "values": [
35                            "United States"
36                        ]
37                    }
38                ],
39                "percentage": 0,
40                "bucketingKey": "amplitude_id",
41                "rolloutWeights": {
42                    "on": 1
43                }
44            }
45        ]
46    }
47}

List variants

1GET https://experiment.amplitude.com/api/1/flags/{id}/variants

Fetch a list of all variants for a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.

Response

A successful request returns a 200 OK response and a list of variants encoded as an array of JSON objects in the response body.

1curl --request GET \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

1[
2    {
3        "key": "on",
4        "name": "",
5        "payload": {},
6        "description": "",
7        "rolloutWeight": 1
8    }
9]

Get variant details

1GET https://experiment.amplitude.com/api/1/flags/{id}/variants/{variantKey}

Fetch details of a specific variant of a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`variantKey`	Required. String. The variant's key.

Response

A successful request returns a 200 OK response and a JSON object with details of a flag variant.

1curl --request GET \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

1{
2    "key": "on",
3    "name": "",
4    "payload": {},
5    "description": "",
6    "rolloutWeight": 1
7}

Get variant inclusions

1GET https://experiment.amplitude.com/api/1/flags/{id}/variants/{variantKey}/users

Fetch a list of inclusions for a specific variant of a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`variantKey`	Required. String. The variant's key.

Response

A successful request returns a 200 OK response and a list of inclusions of flag's variant as an array of JSON objects.

1curl --request GET \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>/users' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

1[
2    <user>@<your-company-email>,
3    <userId>
4]

Create variant

1POST https://experiment.amplitude.com/api/1/flags/{id}/variants

Create a new variant for a flag

Path variables

Name	Description
`id`	Required. String. Flag's ID.

Request body

Name	Requirement	Type	Description
`key`	Required	string	The variant key.
`description`	Optional	string	Description for the variant.
`name`	Optional	string	Name for the variant.
`payload`	Optional	JSON	The variant's payload. Must be a valid JSON element.
`rolloutWeight`	Optional	number	Rollout weight for non-targeted users.

Example request

1{
2    "key": "new-variant-key",
3    "description": "optional description for variant",
4    "name": "optional name for variant",
5    "payload": {"variant-payload": "example payload"},
6    "rolloutWeight": 0
7}

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request POST \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants' \
3    --header 'Content-Type: application/json' \
4    --header 'Accept: application/json' \
5    --header 'Authorization: Bearer <management-api-key>' \
6    --data '{"key":"<key>","name":"<name>","description":"<description>","payload":"<payload>","rolloutWeight":<rolloutWeight>}'

Edit variant

1POST https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>

Edit a variant for a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`variantKey`	Required. String. The variant's key.

Example request

1{
2    "key": "updated-variant-key",
3    "description": "updated optional description for variant",
4    "name": "optional name for variant",
5    "payload": {"variant-payload": "example payload"},
6    "rolloutWeight": 0
7}

Request body

Name	Requirement	Type	Description
`key`	Optional	string	The variant key.
`description`	Optional	string	Description for the variant.
`name`	Optional	string	Name for the variant.
`payload`	Optional	string	Optional payload. Value must be a valid JSON element. This value replaces the existing value for the variant payload.
`rolloutWeight`	Optional	number	Rollout weight for non-targeted users.

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request PATCH \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>' \
3    --header 'Content-Type: application/json' \
4    --header 'Accept: application/json' \
5    --header 'Authorization: Bearer <management-api-key>' \
6    --data '{"key":"<key>","name":"<name>","description":"<description>","payload":"<payload>","rolloutWeight":<rolloutWeight>}'

Remove variant

1DELETE https://experiment.amplitude.com/api/1/flags/{id}/variants/{variantKey}

Remove a variant from a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`variantKey`	Required. String. The variant's key.

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request DELETE \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

Add users to variant

1POST https://experiment.amplitude.com/api/1/flags/{id}/variants/{variantKey}/users

Add inclusions (users or devices) to flag's variant.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`variantKey`	Required. String. The variant's key.

Request body

Name	Requirement	Type	Description
`inclusions`	Required	object	Contains an string array of user or device ids.

Example request

1{
2    "inclusions": ["<user1>@<your-company-email>, <user2>@<your-company-email>, <userId>"]
3}

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request POST \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>/users' \
3    --header 'Content-Type: application/json' \
4    --header 'Accept: application/json' \
5    --header 'Authorization: Bearer <management-api-key>' \
6    --data '{"inclusions":<["id1", "id2", "id3"]>}'

Remove users from variant

1DELETE https://experiment.amplitude.com/api/1/flags/{id}/variants/{variantKey}/users/{userIndex}

Remove inclusions (users or devices) from flag's variant.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`variantKey`	Required. String. The variant's key.
`userIndex`	Required. String. The user's index. Zero-indexed. Index-based array of users can be obtained via Get variant inclusions

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request DELETE \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>/users/<userIndex>' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

Remove all users from variant

1DELETE https://experiment.amplitude.com/api/1/flags/{id}/variants/{variantKey}/users

Remove all inclusions (users or devices) from flag's variant.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`variantKey`	Required. String. The variant's key.

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request DELETE \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>/users' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

Bulk remove users from variant

1DELETE https://experiment.amplitude.com/api/1/flags/{id}/variants/{variantKey}/bulk-delete-users

Bulk remove users or devices from flag's variant. Limited to 100 per request.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`variantKey`	Required. String. The variant's key.

Request body

Name	Requirement	Type	Description
`users`	Required	object	Contains an string array of user or device ids.

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request DELETE \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/variants/<variantKey>/bulk-delete-users' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>' \
5    --data '{"users":<["id1", "id2", "id3"]>}'

List deployments

1GET https://experiment.amplitude.com/api/1/flags/{id}/deployments

List all deployments for a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.

Response

A successful request returns a 200 OK response and an array of JSON objects with flag's deployment details.

1curl --request GET \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/deployments' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

1[
2    {
3        "id": <id>,
4        "projectId": <projectId>,
5        "label": "rest-api",
6        "key": <key>,
7        "deleted": false
8    }
9]

Create deployment

1POST https://experiment.amplitude.com/api/1/flags/{id}/deployments

Add a deployment for a flag.

Path variables

Name	Description
`id`	Required. String. The object's ID.

Request body

Name	Requirement	Type	Description
`deployments`	Required	object	Contains an string array of deployment ids.

Example request

1{
2    "deployments": [<deploymentId>]
3}

???example "Example request (click to open)"

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request POST \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/deployments' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'
5    --data '{"deployments":[<deploymentId>]}'

Remove deployment

1DELETE https://experiment.amplitude.com/api/1/flags/{id}/deployments/{deploymentId}

Remove a deployment from a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.
`deploymentId`	Required. String. The deployment's ID.

Response

A successful request returns a 200 OK response and OK text.

Request

1curl --request DELETE \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>/deployments/<deploymentId>' \
3    --header 'Accept: application/json' \
4    --header 'Authorization: Bearer <management-api-key>'

Edit

1PATCH https://experiment.amplitude.com/api/1/flags/{id}

Edit a flag.

Path variables

Name	Description
`id`	Required. String. Flag's ID.

Request body

Name	Requirement	Type	Description
`name`	Optional	string	Name.
`description`	Optional	string	Description.
`bucketingKey`	Optional	string	The user property to bucket the user by.
`bucketingSalt`	Optional	string	Bucketing salt.
`bucketingUnit`	Optional	string	Bucketing unit represented by a group type from the accounts add-on. Used for group level bucketing and analysis.
`evaluationMode`	Optional	string	Evaluation mode for the flag, either `local` or `remote`.
`rolloutPercentage`	Optional	number	Rollout percentage for non-targeted users. Range 0 - 100.
`targetSegments`	Optional	object	See the `targetSegments` table for more information. When `targetSegments` object is provided, it will replace existing target segments. Note: cohorts are not supported at the moment.
`enabled`	Optional	boolean	Property to activate or deactivate flag.
`archive`	Optional	boolean	Property to archive or unarchive flag.
`tags`	Optional	string array	A list of tags for the flag. Tags are added and deleted by the same operation. If you would like to add new tags to the existing ones, you should fetch a list of all flag tags first.

Example request

 1{
 2    "name": "updated name",
 3    "description": "updated description",
 4    "bucketingKey": "amplitude_id",
 5    "bucketingSalt": "<bucketingSalt>",
 6    "bucketingUnit": "org id",
 7    "evaluationMode": "remote",
 8    "rolloutPercentage": 0,
 9    "enabled": false,
10    "tags": ["prod", "staging"]
11}

Response

A successful request returns a 200 OK response.

response

1curl --request PATCH \
2    --url 'https://experiment.amplitude.com/api/1/flags/<id>' \
3    --header 'Content-Type: application/json' \
4    --header 'Accept: application/json' \
5    --header 'Authorization: Bearer <management-api-key>' \
6    --data '{"enabled":<enabled>,"rolloutPercentage":<rolloutPercentage>}'

Create

1POST https://experiment.amplitude.com/api/1/flags

Create a new flag.

Request body

Name	Requirement	Type	Description
`projectId`	Required	string	The project's ID.
`key`	Required	string	The flag key.
`name`	Optional	string	The flag name.
`description`	Optional	string	Description for the flag.
`variants`	Optional	object array	Array of `variants`.
`bucketingKey`	Optional	string	The user property to bucket the user by.
`rolloutWeights`	Optional	object	Rollout weights for non-targeted users. The object should be a mapping from variant key to rollout weight as an integer. For example: `{ "control": 1, "treatment": 1 }`.
`targetSegments`	Optional	object	See the `targetSegments` table for more information.
`deployments`	Optional	string array	Array of deployments that the flag should be assigned to.
`evaluationMode`	Optional	string	Experiment evaluation mode; options include `remote` or `local`.

`variants`

The variants field contains these objects.

Name	Requirement	Type	Description
`key`	Required	string	The key (a.k.a value) of the variant.
`payload`	Optional	string	Optional payload. Value must be a valid JSON element.
`name`	Optional	string	The variant name.
`description`	Optional	string	The variant description.

`targetSegments`

The targetSegments field contains these objects.

Name	Requirement	Type	Description
`name`	Required	string	The segment name.
`conditions`	Required	object array	Array of `conditions`.
`percentage`	Required	number	The allocation percentage for users who match a condition.
`rolloutWeights`	Required	object	A map from variant key to rollout weight. For example: `{ "control": 1, "treatment": 1 }`.

`conditions`

The conditions field contains these objects.

Name	Requirement	Type	Description
`type`	Required	string	Must have value: `property`
`prop`	Required	string	The property to use in the condition. Prefix custom and free-form properties with `gp:`
`op`	Required	string	The operation to use in this condition.
`values`	Required	string array	The values to use in the operation.

`op`

A string value representing operations on a property value. Possible values are:

is
is not
contains
does not contain
less
less or equal
greater
greater or equal
set is
set is not
set contains
set does not contain
glob match
glob does not match

Example request

 1{
 2    "projectId":"<projectId>",
 3    "name": "Analyze button clicks",
 4    "key": "analyze-button-clicks",
 5    "description": "analyze button clicks on the main page",
 6    "variants": [
 7        {
 8            "key": "on"
 9        }
10    ],
11    "rolloutWeights": {"on": 1},
12    "targetSegments": [
13        {
14            "name": "Segment 1",
15            "conditions": [
16                {
17                    "prop": "country",
18                    "op": "is",
19                    "type": "property",
20                    "values": [
21                        "United States"
22                    ]
23                }
24            ],
25            "percentage": 0,
26            "bucketingKey": "amplitude_id",
27            "rolloutWeights": {
28                "on": 1
29            }
30        }
31    ],
32    "deployments": ["<deploymentId>"],
33    "evaluationMode": "remote"
34}

Response

A successful request returns a 200 OK response and a JSON object with the flag's id and url.

1curl --request POST \
2    --url 'https://experiment.amplitude.com/api/1/flags' \
3    --header 'Content-Type: application/json' \
4    --header 'Accept: application/json' \
5    --header 'Authorization: Bearer <management-api-key>' \
6    --data '{"projectId":"<projectId>","key":"<key>"}'

1{
2    "id": "<id>",
3    "url": "http://experiment.amplitude.com/amplitude/<projectId>/config/<id>"
4}