> ## Documentation Index
> Fetch the complete documentation index at: https://docs.memorylake.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQ

> Common questions about Memory Router — code changes, providers, security, fallback, and pricing

<AccordionGroup>
  <Accordion title="Do I need to change my code?">
    Only the base URL and one header. Your prompts, streaming, tool calls, and response handling stay identical — Memory Router speaks the same API as your provider.
  </Accordion>

  <Accordion title="Which providers are supported?">
    OpenAI, Anthropic, Google Gemini, Groq, DeepSeek, OpenRouter, and any OpenAI-compatible endpoint. The OpenAI Assistants API is not yet supported. See [Deployment Modes](/features/memory-router/deployment-modes#supported-providers) for the full list.
  </Accordion>

  <Accordion title="What is the difference between BYOK and MemoryLake-hosted?">
    BYOK (Bring Your Own Key) means you supply your own provider key plus a MemoryLake key — billing and rate limits stay with your provider account. MemoryLake-hosted needs only a MemoryLake key: we run the major models for you, so you skip provider sign-up entirely.
  </Accordion>

  <Accordion title="In BYOK mode, is my provider key safe?">
    Yes. Your provider key is encrypted in transit and forwarded to the provider on each call. MemoryLake never stores, logs, or reuses it — it is passthrough only.
  </Accordion>

  <Accordion title="What happens if MemoryLake is down?">
    In BYOK mode Memory Router fails open: the request passes straight through to your provider so your application keeps working with zero downtime. See [Observability](/features/memory-router/observability#graceful-fallback).
  </Accordion>

  <Accordion title="How does it reduce tokens?">
    Instead of replaying the entire history each turn, the Router removes redundant context and injects only the relevant memories — fewer tokens per call as conversations grow.
  </Accordion>

  <Accordion title="Is the memory shared with the MemoryLake API?">
    Yes. The Router and the [MemoryLake API](/features/memorylake/overview) operate on the same memory pool, so anything stored one way is retrievable the other.
  </Accordion>

  <Accordion title="Is there a free plan?">
    Yes. Memory Router is available on the Free tier so you can integrate and test before scaling up.
  </Accordion>
</AccordionGroup>