> ## Documentation Index
> Fetch the complete documentation index at: https://docs.inceptionlabs.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# ElevenLabs
> Wire Mercury 2.5 into the ElevenLabs Agents platform as a custom LLM.
This tutorial creates a voice assistant, integrating the realtime reasoning intelligence of Mercury 2.5 with the TTS and STT models from ElevenLabs. For this demo, you will need an Inception [API key](https://platform.inceptionlabs.ai/dashboard/api-keys) and an ElevenLabs [account](https://elevenlabs.io/app/sign-up).
Prefer to build the voice loop yourself in code? See the [Realtime Voice Assistant cookbook](/cookbooks/realtime-voice-assistant).
1. Navigate to the **Agents** [platform](https://elevenlabs.io/app/agents?platform=agents) on the ElevenLabs sidebar.
2. Create a **Blank Agent**. You can name it **Mercury 2.5**.
3. Click into the model dropdown in the bottom right, under **LLM**.
4. Scroll all the way down and select **Custom LLM**.
5. Fill in Custom LLM details as follows:
* Add your Inception API key by clicking **API Key** —> **Create new secret**
* Set **Server URL** to `https://api.inceptionlabs.ai/v1`
* Set **Model ID** to `mercury-2.5`
* Set **Temperature** to `0.75`
* Set **Reasoning Effort** as desired (N.B. leaving it unset defaults to `medium` reasoning effort)
6. Add any custom tools under the **Tools** tab.
7. Amend the Mercury 2.5 system prompt as desired, then hit **Publish** in the top right corner when done!
8. For phone integration, add **Mercury 2.5** as the assigned agent to pick up your phone calls.
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