IntelliToggle OpenFeature provider for Dart

The official server-side Dart provider for IntelliToggle, built on the OpenFeature Dart Server SDK.

The legacy intellitoggle_server_sdk package is deprecated. New server integrations should use this package.

Install

dependencies:
  openfeature_dart_server_sdk: ^0.0.24
  openfeature_provider_intellitoggle: ^0.0.11

The provider uses an IntelliToggle OAuth client with flags:read and flags:evaluate scopes. Keep the client secret in a runtime secret manager; never ship it in a browser or mobile application.

Configure and evaluate

import 'dart:io';

import 'package:openfeature_provider_intellitoggle/openfeature_provider_intellitoggle.dart';

Future<void> main() async {
  final provider = IntelliToggleProvider(
    clientId: Platform.environment['INTELLITOGGLE_CLIENT_ID']!,
    clientSecret: Platform.environment['INTELLITOGGLE_CLIENT_SECRET']!,
    tenantId: Platform.environment['INTELLITOGGLE_TENANT_ID']!,
    options: IntelliToggleOptions(
      baseUri: Uri.parse('https://api.intellitoggle.com'),
      environment: 'production',
    ),
  );

  final api = OpenFeatureAPI();
  await api.setProviderAndWait(provider);
  final client = api.getClient('orders-service');

  final enabled = await client.getBooleanFlag(
    'new-checkout',
    defaultValue: false,
    context: const EvaluationContext(
      targetingKey: 'non-pii-subject-id',
      attributes: {
        'cohort': 'beta',
        'device.platform': 'android',
      },
    ),
  );

  print(enabled);
  await OpenFeatureAPI.resetInstance();
}

The default transport uses IntelliToggle's canonical REST endpoints:

• POST /api/v1/oauth/token
• POST /api/v1/flags/{flagKey}/evaluate

Use IntelliToggleOptions.environment to supply the deployment environment for every evaluation. An invocation context can override it by explicitly providing environment.

Context and privacy

Evaluation attributes are sent as IntelliToggle's top-level context contract. JSON-compatible nested maps and lists are preserved, including dotted attribute names.

The provider does not require a targeting key for default flag evaluation. When targeting is needed, use an opaque, non-PII identifier. Attributes listed in privateAttributes are removed before the request is sent:

const EvaluationContext(
  targetingKey: 'subject-7f41',
  attributes: {
    'plan': 'free',
    'email': 'not-sent@example.com',
    'privateAttributes': ['email'],
  },
)

Paid entitlements, authorization, and other product policy should remain in the consuming service. A feature flag is not an authorization boundary.

Failure behavior

IntelliToggle follows OpenFeature fallback semantics:

• missing flags return the caller default with FLAG_NOT_FOUND;
• response type mismatches return the caller default with TYPE_MISMATCH;
• authentication, transport, and unexpected API failures return the caller default with GENERAL.

Use the OpenFeature detailed-evaluation methods when the caller needs the reason, variant, or error code.

Optional OFREP transport

Set useOfrep: true and provide ofrepBaseUri to evaluate through an OFREP-compatible endpoint. The package also includes local OREP/OFREP helpers for protocol testing.

final options = IntelliToggleOptions(
  useOfrep: true,
  ofrepBaseUri: Uri.parse('https://ofrep.example.com'),
  ofrepAuthToken: Platform.environment['OFREP_AUTH_TOKEN'],
  timeout: const Duration(seconds: 5),
  maxRetries: 3,
  cacheTtl: const Duration(minutes: 1),
);

Plain HTTP is accepted only for localhost and 127.0.0.1.

Local and fallback testing

final provider = InMemoryProvider()
  ..setFlag('new-checkout', true);

final api = OpenFeatureAPI();
await api.setProviderAndWait(provider);
final client = api.getClient('test-service');

final enabled = await client.getBooleanFlag(
  'new-checkout',
  defaultValue: false,
);

Run the package validation suite with:

dart pub get
dart analyze
dart test
dart pub publish --dry-run

Live IntelliToggle integration tests additionally require INTELLITOGGLE_CLIENT_ID, INTELLITOGGLE_CLIENT_SECRET, and INTELLITOGGLE_TENANT_ID. Set INTELLITOGGLE_API_URL to test a non-production deployment.

License

BSD-3-Clause