Flags API

Create, read, update, and delete feature flags.

Create Flag

POST /v1/projects/{projectID}/flags

Auth: JWT (Owner, Admin, Developer)

Request

{
  "key": "new-checkout",
  "name": "New Checkout Flow",
  "description": "Redesigned checkout experience",
  "flag_type": "boolean",
  "default_value": false,
  "tags": ["checkout", "experiment"],
  "prerequisites": ["billing-enabled"],
  "mutual_exclusion_group": "checkout-experiments"
}

Field	Type	Required	Default	Description
key	string	Yes	—	Unique identifier (immutable)
name	string	Yes	—	Display name
description	string	No	""	Description
flag_type	string	No	boolean	boolean, string, number, json, ab
default_value	any	No	false	Default value when disabled
tags	string[]	No	[]	Tags for organization
prerequisites	string[]	No	[]	Flag keys that must be enabled
mutual_exclusion_group	string	No	""	Mutex group name

Response 201 Created

{
  "id": "uuid",
  "project_id": "uuid",
  "key": "new-checkout",
  "name": "New Checkout Flow",
  "description": "Redesigned checkout experience",
  "flag_type": "boolean",
  "default_value": false,
  "tags": ["checkout", "experiment"],
  "prerequisites": ["billing-enabled"],
  "mutual_exclusion_group": "checkout-experiments",
  "created_at": "2026-04-01T00:00:00Z",
  "updated_at": "2026-04-01T00:00:00Z"
}

---

List Flags

GET /v1/projects/{projectID}/flags

Auth: JWT (All roles)

Response 200 OK

Returns an array of flag objects.

---

Get Flag

GET /v1/projects/{projectID}/flags/{flagKey}

Auth: JWT (All roles)

Response 200 OK

Returns a single flag object.

---

Update Flag

PUT /v1/projects/{projectID}/flags/{flagKey}

Auth: JWT (Owner, Admin, Developer)

Request

Partial update — only provided fields are changed.

{
  "name": "Updated Name",
  "description": "Updated description",
  "default_value": true,
  "tags": ["new-tag"],
  "prerequisites": [],
  "mutual_exclusion_group": ""
}

Response 200 OK

Returns the updated flag object.

---

Delete Flag

DELETE /v1/projects/{projectID}/flags/{flagKey}

Auth: JWT (Owner, Admin, Developer)

Response 204 No Content

---

Promote Flag

Copy flag configuration from one environment to another.

POST /v1/projects/{projectID}/flags/{flagKey}/promote

Auth: JWT (Owner, Admin, Developer)

Request

{
  "source_env_id": "dev-env-uuid",
  "target_env_id": "staging-env-uuid"
}

Response 200 OK

Returns the target environment's updated flag state. Copies enabled, default_value, rules, and percentage_rollout.

---

Kill Switch

Emergency disable a flag in an environment.

POST /v1/projects/{projectID}/flags/{flagKey}/kill

Auth: JWT (Owner, Admin, Developer)

Request

{
  "env_id": "production-env-uuid"
}

Response 200 OK

Returns the flag state with enabled: false. Creates an audit entry with action flag.killed.