> For the complete documentation index, see [llms.txt](https://docs.nebulablock.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nebulablock.com/readme.md).

# Overview

Welcome to [Nebula Block](https://www.nebulablock.com/) — a Montreal-based AI cloud offering serverless inference, on-demand GPU compute, and S3-compatible object storage, with Canadian-hosted options for workloads that have data-residency requirements.

These docs cover everything from your first API call to the full REST reference.

## Start here

| If you want to…                           | Go to                                                            |
| ----------------------------------------- | ---------------------------------------------------------------- |
| Make your first API call in a few minutes | [Quickstart](/getting-started/get-started/quickstart.md)         |
| Understand what Nebula Block offers       | [Products](/getting-started/get-started/products.md)             |
| See which models you can call             | [Model Catalog](/products/serverless-inference/model-catalog.md) |
| Know your rate limits                     | [Tiers and Rate Limits](/account/tiers-and-limits.md)            |
| Look up an endpoint                       | [API Reference](/api-reference/api-reference.md)                 |

## Core products

### Serverless Inference

Call state-of-the-art models — text, vision, image, video, embedding, and reranking — through a single OpenAI-compatible endpoint at `https://inference.nebulablock.com/v1`. No servers to provision, no models to load; point any OpenAI SDK at it and go.

→ [Serverless Inference](/products/serverless-inference.md) · [Model Catalog](/products/serverless-inference/model-catalog.md)

### GPU Cloud

Rent on-demand GPU and CPU instances by the hour, from single GPUs to multi-GPU nodes, deployed in minutes with your own SSH keys and firewall rules.

→ [GPU Cloud](/products/gpu-cloud.md)

### Object Storage

S3-compatible storage for datasets, checkpoints, and model outputs. Works with `s3cmd`, `boto3`, and the AWS SDKs you already use.

→ [Object Storage](/products/object-storage.md)

## Build with the API

Nebula Block exposes two APIs:

| API                                   | Base URL                               | Use it for                                                     |
| ------------------------------------- | -------------------------------------- | -------------------------------------------------------------- |
| **Inference API** (OpenAI-compatible) | `https://inference.nebulablock.com/v1` | Chat completions, vision, images, video, embeddings, reranking |
| **Platform API**                      | `https://api.nebulablock.com/api/v1`   | Instances, SSH keys, API keys, object storage, billing, teams  |

→ [API Reference](/api-reference/api-reference.md) · [Authentication](/api-reference/authentication.md)

## Manage your account

* [API Keys](/account/api-keys.md) — create and rotate keys
* [Tiers and Rate Limits](/account/tiers-and-limits.md) — what your tier unlocks
* [Teams](/account/teams.md) — shared billing, roles, and team API keys
* [Referral Program](/account/referral.md) — earn commission on referred spend

## Get help

* [FAQ](/resources/faq.md) · [Glossary](/resources/glossary.md)
* [Contact Us](/resources/contact.md)
* [Legal](/resources/legal.md)