0.3 source candidate: evaluate only flags configured for server evaluation. Customer sessions cannot supply customerId; verified identity and stored attributes override caller values. Returns results and configuration generation; the server records exposures.
API v1Updated
Make the request
0.3 source candidate: evaluate only flags configured for server evaluation. Customer sessions cannot supply customerId; verified identity and stored attributes override caller values. Returns results and configuration generation; the server records exposures.
Credential
Server API key or customer token. Customer calls cannot select another customer.
Permission
features:read
Set the base URL and App ID from SDK setup. These examples use placeholders and do not execute requests. Never put a server key in browser code.
The response tab lists field types, not an example payload. Actual values depend on customer state.
Request parameters
JSON body
attributesobjectRequired
Up to 128 keys, 1–128 characters each, and 64 KiB total JSON. Values may contain nested JSON, limited to 20 levels and 10,000 nodes per value. Reserved fields are rejected. Null is a value; delete keys with removeAttributes. Tags live in attributes.tags and change through tagChanges.
featuresarrayOptional
The features value for this operation. Its accepted type and constraints are listed above and below.
minItems: 1 · maxItems: 500
customerIduuidOptional
Indiana customer ID mapped from a verified identity on the server. Omit for customer-token calls, which use the token-bound customer.
Response fields
Successful responses include requestId and scope. Use the actual business status or accepted field to determine the result. Optional fields are omitted when unavailable.
HTTP 200 · application/json
requestIduuidRequired
Server-generated HTTP request UUID. Include it when reporting a failed request.
scopeobjectRequired
The App and environment of this response. Headers only verify scope; they cannot switch key scope.
Show child fields
projectIdstringRequired
App ID bound to the credential.
minLength: 1
environmentenumRequired
Separate data scope: sandbox or live.
Show allowed values
"sandbox""live"
generationstringRequired
The generation value for this operation. Its accepted type and constraints are listed above and below.
pattern: ^[a-f0-9]{64}$
evaluatedAtdate-timeRequired
UTC server time at which this state was evaluated.
expiresAtdate-time | nullRequired
ISO 8601 UTC expiry. Expired sessions and reservations cannot be reused.
featuresobjectRequired
The features value for this operation. Its accepted type and constraints are listed above and below.
Handle errors
Common failures
Code
Recovery
UNAUTHENTICATED
Verify the key or refresh the expired customer token once.
FORBIDDEN
Check current key permissions and customer access.
INVALID_REQUEST
Check field types, UUIDs, decimal strings and mutually exclusive fields.
SCOPE_MISMATCH
Use the App and environment bound to the credential.
Common failures
UNAUTHENTICATED
Recovery
Verify the key or refresh the expired customer token once.
FORBIDDEN
Recovery
Check current key permissions and customer access.
INVALID_REQUEST
Recovery
Check field types, UUIDs, decimal strings and mutually exclusive fields.
SCOPE_MISMATCH
Recovery
Use the App and environment bound to the credential.