> 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/resources/faq.md).

# FAQ

Answers to common questions about Nebula Block accounts, limits, billing, compute, and data residency.

## Getting started

**Can I use the platform for free?** You can create an account for free, but the free tier (Tier 1) has a per-model daily request cap of 0 on most of the catalog, so in practice you need credit to call models. A $5 deposit moves you to Tier 2 and opens things up. See [Tiers and Rate Limits](/account/tiers-and-limits.md).

**Which API do I call?** Two base URLs, one API key for both. Use `https://inference.nebulablock.com/v1` to run models, and `https://api.nebulablock.com/api/v1` to manage instances, storage, keys, and billing. See the [API Reference](/api-reference/api-reference.md).

**Can I use the OpenAI SDK?** Yes. The Inference API implements the OpenAI surface — set `base_url` to `https://inference.nebulablock.com/v1` and your Nebula Block key as `api_key`. See the [Quickstart](/getting-started/get-started/quickstart.md).

**How do I know which models are available?** Call [`GET /v1/models`](/api-reference/inference-api/list-models.md) for the live list, or browse the [Model Catalog](/products/serverless-inference/model-catalog.md).

## Limits and errors

**Why am I getting a `429`?** You have hit one of three limits: requests per minute, tokens per minute, or requests per day — either account-wide or for that specific model. The message says which. Per-day counters reset at 00:00 UTC. Your current limits are under [Limits](https://console.nebulablock.com/limits) in the console.

**A model works for someone else but returns `429` for me.** Daily caps are set per model *and* per tier, so the same model can be available at one tier and capped at zero on another. Upgrading your tier is what changes it.

**Why am I getting a `402`?** Your credit balance cannot cover the request. This is returned up front for priced jobs such as video generation, so nothing is queued or charged.

## Compute

**What do I need to rent a GPU?** Tier 3, reached with a $10 deposit, plus an SSH key on your account. See the [GPU Cloud Quickstart](/products/gpu-cloud/quickstart.md).

**What happens if I run out of credit while an instance is running?** Instances are deleted automatically when the balance is exhausted. Turn on Auto-Pay for anything you cannot afford to lose — see [Billing](/getting-started/get-started/billing.md).

**Am I billed for a stopped instance?** Yes. Instances are billed for as long as they exist, powered on or not. Terminate what you are done with.

## Data and accounts

**Where is my data processed?** Models marked 🇨🇦 in the [Model Catalog](/products/serverless-inference/model-catalog.md) are hosted in Canada, and GPU capacity is available in Canada, the US, Finland, France, and Norway. See [Sovereign AI Compute](https://www.nebulablock.com/ai-sovereign-compute) and the [Data Policy](/resources/legal/data-policy.md).

**Can I share resources with my team?** Yes — [Teams](/account/teams.md) give you shared billing, per-member roles, and team API keys. That is the supported route; the same payment card cannot be used on two separate accounts.

## 🌍 Nebula Block Supported Countries🌍

We provide the following list of countries and territories where **Nebula Block** services are officially supported. Accessing or attempting to access Nebula Block from outside these supported regions may result in service restrictions or account suspension.

### ✅ Supported Countries & Regions

* Albania
* Algeria
* Andorra
* Angola
* Antigua and Barbuda
* Argentina
* Armenia
* Australia
* Austria
* Bahamas
* Bahrain
* Bangladesh
* Barbados
* Belgium
* Belize
* Benin
* Bhutan
* Bolivia
* Bosnia and Herzegovina
* Botswana
* Brazil
* Brunei
* Bulgaria
* Burkina Faso
* Burundi
* Cabo Verde
* Cambodia
* Cameroon
* Canada
* Central African Republic
* Chad
* Chile
* Colombia
* Comoros
* Costa Rica
* Croatia
* Cyprus
* Czech Republic
* Denmark
* Dominica
* Dominican Republic
* Ecuador
* Egypt
* El Salvador
* Estonia
* Eswatini (Swaziland)
* Ethiopia
* Fiji
* Finland
* France
* Gabon
* Gambia
* Georgia
* Germany
* Ghana
* Greece
* Grenada
* Guatemala
* Guinea
* Guyana
* Haiti
* Honduras
* Hungary
* Iceland
* India
* Indonesia
* Ireland
* Israel
* Italy
* Jamaica
* Japan
* Jordan
* Kazakhstan
* Kenya
* Kuwait
* Laos
* Latvia
* Lebanon
* Lesotho
* Liberia
* Lithuania
* Luxembourg
* Madagascar
* Malawi
* Malaysia
* Maldives
* Malta
* Mauritania
* Mauritius
* Mexico
* Moldova
* Monaco
* Mongolia
* Montenegro
* Morocco
* Mozambique
* Namibia
* Nepal
* Netherlands
* New Zealand
* Nicaragua
* Niger
* Nigeria
* North Macedonia
* Norway
* Oman
* Pakistan
* Palestine
* Panama
* Papua New Guinea
* Paraguay
* Peru
* Philippines
* Poland
* Portugal
* Qatar
* Romania
* Rwanda
* Saint Kitts and Nevis
* Saint Lucia
* Saint Vincent and the Grenadines
* Samoa
* San Marino
* Saudi Arabia
* Senegal
* Serbia
* Seychelles
* Sierra Leone
* Singapore
* Slovakia
* Slovenia
* Solomon Islands
* Somalia
* South Africa
* South Korea
* Spain
* Sri Lanka
* Suriname
* Sweden
* Switzerland
* Taiwan
* Tanzania
* Thailand
* Togo
* Trinidad and Tobago
* Tunisia
* Turkey
* Uganda
* Ukraine
* United Arab Emirates
* United Kingdom
* United States
* Uruguay
* Uzbekistan
* Vietnam
* Zambia
* Zimbabwe

***

### 🔒 Access Disclaimer

Nebula Block services may be geo-restricted due to local regulations or infrastructure limitations. Attempting to use the service through VPNs, proxies, or other IP-masking techniques in unsupported regions is a violation of our Terms of Service.