# SN1 - APEX

Welcome to **APEX** , the first live Large Language Model application on the [Bittensor network](https://bittensor.com/) and the heart of the Macrocosmos Constellation platform.

## What is APEX?

APEX is a specialized LLM app focused on high-quality language model inference. Powered by validators and a constantly evolving pool of miners, it allows users:

* Generate LLM completions using top open-source models
* Retrieve real-time web results
* Leverage advanced inference modes like multi-step reasoning or test-time thinking

Try the visual interface at [**Mission Command**](https://app.macrocosmos.ai/) — a control center for LLM testing and prompting.

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## Base URL: `https://sn1.api.macrocosmos.ai`

The SN1 APEX API serves as access point for interacting with Macrocosmos's advanced language model inference capabilities. It performs chat completions and decentralized web searches through its primary endpoints: `POST /v1/chat/completions` and `POST /web_retrieval`. This API leverages a decentralized network of miners and validators to process requests, ensuring high-quality and reliable outputs. Developers can utilize the [Macrocosmos API](/developers/readme.md), specifically the `ApexClient`, to integrate these capabilities into their applications.

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## How the APEX API Works

At its core, the APEX API has two main endpoints:

* `POST /v1/chat/completions` – Send chat-style messages to receive a generated response
* `POST /web_retrieval` – Perform decentralized web search via multiple miners

Each request is routed to miners across the subnet based on task requirements, model filters, and optional parameters you provide. Validators coordinate execution, verify quality, and return reliable completions.

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## Models Available

SN1 currently supports the following open-source models:

* `Meta-Llama-3.1-70B-Instruct-AWQ-INT4`
* `Mistral-Small-3.1-24B-Instruct`

...with [Google's Gemma 3 27B](https://huggingface.co/google/gemma-3-27b-it) on the roadmap.

For more details, see our [Supported Models](/developers/api-documentation/sn1-apex/supported-models.md)page.

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## **Rate limits**

Regular API keys: Limited to 100 requests per hour\
Validator key: Limited to 1000 requests per hour

### Need Help?

If you have any questions or require support, please message us in our official [**Macrocosmos Discord**](https://discord.gg/sXJPmGTnVR) server . You can drop a message in the `#apex-sn1` channel.


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# 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.macrocosmos.ai/developers/api-documentation/sn1-apex.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.