# Features

- [Cross cutting concerns](https://docs.eiffel.dev/features/cross-cutting-concerns.md)
- [API response consistency](https://docs.eiffel.dev/features/cross-cutting-concerns/api-response-consistency.md)
- [Global exception handling](https://docs.eiffel.dev/features/cross-cutting-concerns/global-exception-handling.md)
- [Idempotency](https://docs.eiffel.dev/features/cross-cutting-concerns/idempotency.md): IdempotentRequest Action Filter Attribute
- [Audit logging](https://docs.eiffel.dev/features/cross-cutting-concerns/audit-logging.md)
- [Caching](https://docs.eiffel.dev/features/caching.md)
- [Configuration](https://docs.eiffel.dev/features/caching/configuration.md)
- [In-Memory](https://docs.eiffel.dev/features/caching/configuration/in-memory.md)
- [Redis](https://docs.eiffel.dev/features/caching/configuration/redis.md)
- [Usage](https://docs.eiffel.dev/features/caching/usage.md)
- [API](https://docs.eiffel.dev/features/caching/api.md)
- [CacheSource](https://docs.eiffel.dev/features/caching/api/cachesource.md): CacheSource enum provides a list of supported cache sources
- [InMemoryCacheOptions](https://docs.eiffel.dev/features/caching/api/inmemorycacheoptions.md): In-Memory cache options
- [RedisCacheOptions](https://docs.eiffel.dev/features/caching/api/rediscacheoptions.md): Redis cache options
- [ICacheService](https://docs.eiffel.dev/features/caching/api/icacheservice.md)
- [ICacheServiceFactory](https://docs.eiffel.dev/features/caching/api/icacheservicefactory.md): Cache factory resolves cache service with given index. You can use this method for both cache source but only useful when used with Redis.
- [Localization](https://docs.eiffel.dev/features/localization.md)
- [Job Processing](https://docs.eiffel.dev/features/job-processing.md): Distributed, scalable, loosely coupled job processing
- [Multi-Tenancy](https://docs.eiffel.dev/features/multi-tenancy.md)
- [Metrics & monitoring](https://docs.eiffel.dev/features/metrics-and-monitoring.md)
- [Transactional outbox](https://docs.eiffel.dev/features/transactional-outbox.md)
- [PostgreSQL](https://docs.eiffel.dev/features/transactional-outbox/postgresql.md)
- [MongoDB (cluster only)](https://docs.eiffel.dev/features/transactional-outbox/mongodb-cluster-only.md)
- [Messaging](https://docs.eiffel.dev/features/messaging.md)
- [Kafka](https://docs.eiffel.dev/features/messaging/kafka.md)
- [Rabbit MQ](https://docs.eiffel.dev/features/messaging/rabbit-mq.md)
- [Azure Service Bus](https://docs.eiffel.dev/features/messaging/azure-service-bus.md)
- [Awaitable socket client](https://docs.eiffel.dev/features/awaitable-socket-client.md)
- [Graceful shutdown](https://docs.eiffel.dev/features/graceful-shutdown.md)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.eiffel.dev/features.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.