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

# Quickstart

Get from signup to your first API call in under 5 minutes.

{% hint style="info" %}
**TensorX was formerly Tensorix.** Existing API endpoints, keys and links keep working and redirect automatically to their `tensorx.ai` equivalents — there is nothing you need to change.
{% endhint %}

***

## Step 1: Create Your Account

1. Go to [app.tensorx.ai/register](https://app.tensorx.ai/register)
2. Enter your email and password
3. Check your inbox for a verification email
4. Click the verification link

***

## Step 2: Generate an API Key

1. Go to your [Dashboard](https://app.tensorx.ai/dashboard)
2. Navigate to **API Keys**
3. Click **Generate New Key**
4. Enter a name (e.g., "My First Key")
5. Click **Create**

{% hint style="warning" %}
**Copy your key immediately!** The full API key is only shown once. Store it somewhere safe.
{% endhint %}

***

## Step 3: Make Your First API Call

Test that everything works with a simple curl command:

```bash
curl https://api.tensorx.ai/v1/models \
  -H "Authorization: Bearer YOUR_API_KEY"
```

You should see a JSON list of available models. 🎉

***

## Step 4: Chat with a Model

Now let's have a conversation:

{% tabs %}
{% tab title="curl" %}

```bash
curl https://api.tensorx.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "deepseek/deepseek-chat-v3.1",
    "messages": [
      {"role": "user", "content": "Hello! What can you help me with?"}
    ]
  }'
```

{% endtab %}

{% tab title="Python" %}

```python
from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.tensorx.ai/v1"
)

response = client.chat.completions.create(
    model="deepseek/deepseek-chat-v3.1",
    messages=[
        {"role": "user", "content": "Hello! What can you help me with?"}
    ]
)

print(response.choices[0].message.content)
```

{% endtab %}

{% tab title="JavaScript" %}

```javascript
import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: 'YOUR_API_KEY',
  baseURL: 'https://api.tensorx.ai/v1'
});

const response = await client.chat.completions.create({
  model: 'deepseek/deepseek-chat-v3.1',
  messages: [
    { role: 'user', content: 'Hello! What can you help me with?' }
  ]
});

console.log(response.choices[0].message.content);
```

{% endtab %}
{% endtabs %}

***

## Step 5: Check Your Usage

1. Go to [Dashboard → Usage](https://app.tensorx.ai/dashboard/usage)
2. See your request history with timestamps, models, tokens, and costs
3. Export to CSV if needed

***

## That's It! ✅

You're now ready to build with TensorX. Here's what to explore next:

| Next Step                    | Link                                                   |
| ---------------------------- | ------------------------------------------------------ |
| Browse available models      | [Models](/api-reference/models.md)                     |
| Learn about chat completions | [Chat API](/api-reference/chat-completions.md)         |
| Add function calling         | [Function Calling](/api-reference/function-calling.md) |
| Set up streaming             | [Streaming](/api-reference/streaming.md)               |
| Connect your favorite tool   | [Integrations](/readme.md#integrations)                |

***

## Already Using OpenAI?

TensorX is a **drop-in replacement**. Just change two things:

```python
# Before (OpenAI)
client = OpenAI(api_key="sk-...")

# After (TensorX)
client = OpenAI(
    api_key="YOUR_TENSORX_KEY",
    base_url="https://api.tensorx.ai/v1"
)
```

That's it! All your existing code works unchanged.

***

## Common Issues

| Problem                | Solution                                                                         |
| ---------------------- | -------------------------------------------------------------------------------- |
| "Insufficient balance" | Add credits to your account in the [Dashboard](https://app.tensorx.ai/dashboard) |
| "401 Unauthorized"     | Check your API key is correct and complete                                       |
| "404 Not Found"        | Base URL must include `/v1`: `https://api.tensorx.ai/v1`                         |
| Key not working        | Make sure you copied the full key including `sk-` prefix                         |

***

## Need Help?

* 📧 **Email**: <support@tensorx.ai>
* 📚 **Docs**: [docs.tensorx.ai](https://docs.tensorx.ai)


---

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