--- title: Fetch all variable definitions for flag. slug: feature-experimentation/api/fetch-all-variable-definitions-for-flag docTags: createdAt: 2026-08-28T15:54:06.731Z --- { "id": "iOBjtjRiaOfJahu1DmcbK", "type": "api-oas-v2", "data": { "method": "GET", "url": "https://api.optimizely.com/flags/v1//projects/{project_id}/flags/{flag_key}/variable_definitions", "servers": [ { "url": "https://api.optimizely.com/flags/v1//projects/{project_id}/flags/{flag_key}/variable_definitions" } ], "name": "Fetch all variable definitions for flag.", "description": "", "contentType": "application/json", "request": { "pathParameters": [ { "kind": "required", "name": "project_id", "type": "integer", "example": 12345, "description": "The project identifier" }, { "kind": "required", "name": "flag_key", "type": "string", "example": "recurring_deposit", "description": "The Flag identifier" } ], "headerParameters": [ { "name": "accept", "type": "string", "kind": "optional", "description": "Generated from available response content types", "enum": [ "application/json" ], "default": "application/json" } ], "queryParameters": [ { "kind": "optional", "name": "per_page", "type": "integer", "description": "The max number of items to include per page or results.", "format": "int64" }, { "kind": "optional", "name": "page_number", "type": "integer", "description": "

Bypass page_token to jump to specific page

", "format": "int64" }, { "kind": "optional", "name": "page_token", "type": "string", "description": "

Pagination page token. Implements prev, next, last, first

" }, { "kind": "optional", "name": "page_window", "type": "integer", "description": "

Number of previous and next page links to supply for the request (defaults to 1).

" }, { "kind": "optional", "name": "sort", "type": "array", "description": "Sort the Variable Definitions based on the attributes from left to right.\n", "schema": [], "itemType": "string", "customType": "string[]" } ], "bodyDataParameters": [], "formDataParameters": [], "oAuthParameters": [ { "id": "apiKey", "name": "apiKey", "kind": "optional", "type": "http", "scheme": "bearer" }, { "id": "OAuth2", "name": "OAuth2", "kind": "optional", "type": "oauth2", "description": "Write applications that authenticate with the REST API via OAuth 2.0.", "oauth2Flows": { "authorizationCode": { "authorizationUrl": "https://app.optimizely.com/oauth2/authorize", "tokenUrl": "https://app.optimizely.com/oauth2/token", "scopes": { "all": "Grants all access" } } }, "requiredScopes": [ "read", "write" ] } ], "cookieParameters": [] }, "responses": [ { "statusCode": "200", "description": "

Successful retrieval of a page of Variable Definitions for a Flag.

\n

The response includes RESTful JSON (https://restfuljson.org/) styled links and pagination metadata.\nObjects in this API MAY include a url property for a link to itself and MAY append _url to properties for related links.\nIf a link is not present in the response, it indicates a user is not authorized to access the related resource.

", "jsonExample": "", "isExpanded": true, "schema": [ { "kind": "optional", "type": "object", "description": "", "customType": "VariableDefinitions", "schema": [ { "name": "count", "kind": "optional", "type": "integer", "description": "Number of Variables on the current page.", "example": 1 }, { "name": "first_url", "kind": "optional", "type": "object", "description": "Link to first page of Variables in a series.", "complexType": "allOf", "complexItems": [ { "name": "UrlValue", "description": "", "modelRef": "#/components/schemas/UrlValue", "schema": [] } ], "schema": [] }, { "name": "items", "kind": "optional", "type": "array", "description": "", "modelRef": "#/components/schemas/VariableDefinition", "customType": "VariableDefinition[]", "schema": [ { "name": "default_value", "kind": "required", "type": "string", "description": "The default value for the Flag Variable Definition", "example": "0.0" }, { "name": "description", "kind": "optional", "type": "string", "description": "Additional context of the Flag Variable Definition", "example": "This variable is used to configure the amount used for computing the discount" }, { "name": "key", "kind": "required", "type": "string", "description": "Unique string identifier for the Flag Variable Definition within the Flag", "example": "amount" }, { "name": "revision", "kind": "optional", "type": "integer", "readOnly": true, "description": "Revision number for tracking changes" }, { "name": "role", "kind": "optional", "type": "string", "readOnly": true, "description": "Granular permission role", "example": "admin" }, { "name": "type", "kind": "required", "type": "string", "description": "The datatype for the Flag Variable Definition", "example": "double", "enum": [ "boolean", "string", "double", "integer", "json" ] } ] }, { "name": "last_url", "kind": "optional", "type": "object", "description": "Link to the last page of Variables in a series.", "complexType": "allOf", "complexItems": [ { "name": "UrlValue", "description": "", "modelRef": "#/components/schemas/UrlValue", "schema": [] } ], "schema": [] }, { "name": "next_url", "kind": "optional", "type": "object", "description": "

List of links to next pages of Variables in a series.

\n

The first element in the array is the exact next page after the current record, etc.

", "complexType": "allOf", "complexItems": [ { "name": "UrlList", "description": "", "modelRef": "#/components/schemas/UrlList", "schema": [] } ], "schema": [] }, { "name": "page", "kind": "optional", "type": "integer", "description": "

Number of the current page. 1-index based.

", "example": 1 }, { "name": "prev_url", "kind": "optional", "type": "object", "description": "

List of links to previous pages of Variables in a series.

\n

The first element in the array is the exact previous page before the current record, etc.

", "complexType": "allOf", "complexItems": [ { "name": "UrlList", "description": "", "modelRef": "#/components/schemas/UrlList", "schema": [] } ], "schema": [] }, { "name": "total_count", "kind": "optional", "type": "integer", "description": "Total number of Variables for this series.", "example": 1 }, { "name": "total_pages", "kind": "optional", "type": "integer", "description": "Total number of pages for this series.", "example": 1 } ], "modelRef": "#/components/schemas/VariableDefinitions", "isExpanded": true } ] }, { "statusCode": "400", "description": "Malformed requests and invalid parameter names and types", "jsonExample": "", "isExpanded": true }, { "statusCode": "401", "description": "Invalid credentials", "jsonExample": "", "isExpanded": true }, { "statusCode": "403", "description": "Do not have permission to perform the operation", "jsonExample": "", "isExpanded": true } ], "hasXCodeSamples": false, "examples": { "languages": [ { "id": "qD0MD7lv2wTbjKXqNsyko", "language": "curl", "label": "cURL", "code": "curl --request GET \\\n --url https://api.optimizely.com/flags/v1//projects/{project_id}/flags/{flag_key}/variable_definitions \\\n --header 'accept: application/json'" }, { "id": "jPmF7E1WtgLEg5ZOEjvgu", "language": "javascript", "label": "javascript", "code": "var myHeaders = new Headers();\nmyHeaders.append(\"accept\", \"application/json\");\nmyHeaders.append(\"content-type\", \"application/json\");\n\nvar requestOptions = {\n method: 'GET',\n headers: myHeaders,\n redirect: 'follow'\n};\n\nfetch(\"https://api.optimizely.com/flags/v1//projects/{project_id}/flags/{flag_key}/variable_definitions\", requestOptions)\n .then(response => response.text())\n .then(result => console.log(result))\n .catch(error => console.log('error', error));" }, { "id": "j1gHF56ByunS0DdLPo-cI", "language": "ruby", "label": "Ruby", "code": "require \"uri\"\nrequire \"json\"\nrequire \"net/http\"\n\nurl = URI(\"https://api.optimizely.com/flags/v1//projects/{project_id}/flags/{flag_key}/variable_definitions\")\n\nhttps = Net::HTTP.new(url.host, url.port)\nhttps.use_ssl = true\n\nrequest = Net::HTTP::Get.new(url)\nrequest[\"accept\"] = \"application/json\"\nrequest[\"content-type\"] = \"application/json\"\n\nresponse = https.request(request)\nputs response.read_body\n" }, { "id": "jO9ArxbrvsjNNqYJAhUL1", "language": "python", "label": "Python", "code": "import requests\nimport json\n\nurl = \"https://api.optimizely.com/flags/v1//projects/{project_id}/flags/{flag_key}/variable_definitions\"\n\npayload = {}\nheaders = {\n 'accept': 'application/json',\n 'content-type': 'application/json'\n}\n\nresponse = requests.request(\"GET\", url, headers=headers, data=payload)\n\nprint(response.text)\n" } ], "selectedLanguageId": "qD0MD7lv2wTbjKXqNsyko" }, "results": { "languages": [ { "id": "response-0-200", "language": "200", "code": "// Successful retrieval of a page of Variable Definitions for a Flag.\nThe response includes RESTful JSON (https://restfuljson.org/) styled links and pagination metadata.\nObjects in this API MAY include a url property for a link to itself and MAY append _url to properties for related links.\nIf a link is not present in the response, it indicates a user is not authorized to access the related resource.\n{\n \"count\": 1,\n \"first_url\": {},\n \"items\": [\n {\n \"default_value\": \"0.0\",\n \"description\": \"This variable is used to configure the amount used for computing the discount\",\n \"key\": \"amount\",\n \"revision\": 0,\n \"role\": \"admin\",\n \"type\": \"double\"\n }\n ],\n \"last_url\": {},\n \"next_url\": {},\n \"page\": 1,\n \"prev_url\": {},\n \"total_count\": 1,\n \"total_pages\": 1\n}" }, { "id": "response-1-400", "language": "400", "code": "// Malformed requests and invalid parameter names and types\n" }, { "id": "response-2-401", "language": "401", "code": "// Invalid credentials\n" }, { "id": "response-3-403", "language": "403", "code": "// Do not have permission to perform the operation\n" } ], "selectedLanguageId": "response-0-200" } }, "children": [ { "text": "" } ] }