> ## Documentation Index
> Fetch the complete documentation index at: https://docs.costgraph.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication

## Get an API Key

Create an account on [app.costgraph.ai](https://app.costgraph.ai/settings/account/api-keys) to obtain your API key.

<img height="400" src="https://mintcdn.com/baselinehq/_Qgb8NaXmvteAdTt/images/api-key.png?fit=max&auto=format&n=_Qgb8NaXmvteAdTt&q=85&s=149e28ad3aa039a76be93e1f7522203a" data-path="images/api-key.png" />

## Authenticate with the SDK

<Tabs>
  <Tab title="Go">
    ```go theme={null}
    import (
        "fmt"
        "os"

        openapiclient "github.com/baselinehq/pricingapi-client-golang"
    )

    token := os.Getenv("COSTGRAPH_API_KEY")

    configuration := openapiclient.NewConfiguration()
    configuration.DefaultHeader["Authorization"] = fmt.Sprintf("Bearer %s", token)

    client := openapiclient.NewAPIClient(configuration)
    ```
  </Tab>

  <Tab title="TypeScript">
    ```typescript theme={null}
    import { DefaultApi, Configuration } from '@baselinehq/pricingapi-client-typescript';

    const token = process.env.COSTGRAPH_API_KEY;

    const config = new Configuration({
      basePath: 'https://pricing.baselinehq.cloud',
      apiKey: (name: string) => (name === 'X-API-Key' ? token : undefined),
    });

    const client = new DefaultApi(config);
    ```
  </Tab>
</Tabs>

## Raw HTTP

Include your API key in the `X-API-KEY` header:

```bash theme={null}
curl -H "X-API-KEY: $COSTGRAPH_API_KEY" \
     -H "Content-Type: application/json" \
     -X POST https://pricing.baselinehq.cloud/pricing/compute \
     -d '{"instance_type": "s-2vcpu-2gb", "provider": "digitalocean", "region": "nyc1", "service": "Droplet", "usage_type": "ondemand", "operating_system": "linux", "vm": {"cpu_cores": 2, "ram_gb": 2}}'
```