# CSPR supply

The `Supply` entity holds information about total and circulating supply of the Mainnet CSPR token. The circulating supply is calculated according to the [approach described on the Casper website](https://casper.network/en-us/news/update-on-circulating-supply/).

{% hint style="info" %}
At this moment, the API returns correct circulating supply only on the Mainnet
{% endhint %}

## Properties

The `Supply` entity has the following properties:

| Property                            | Type         | Description                                                                                                                                                             |
| ----------------------------------- | ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `token`                             | `string(64)` | Token represented by the supply data. At this point, the value is always `CSPR`                                                                                         |
| `total`                             | `uint64`     | Total available supply of the token                                                                                                                                     |
| `circulating`                       | `uint64`     | Circulating supply of the token calculated according to the [approach described on the Casper website](https://casper.network/en-us/news/update-on-circulating-supply/) |
| `total_annual_issuance`             | `float64`    | Total annual issuance rate                                                                                                                                              |
| `annual_ecosystem_sustain_issuance` | `float64`    | Ecosystem sustain issuance component                                                                                                                                    |
| `annual_staking_rewards_issuance`   | `float64`    | Staking rewards issuance component, calculated as `total_annual_issuance - annual_ecosystem_sustain_issuance`                                                           |
| `annual_issuance`                   | `float64`    | Deprecated. Use `total_annual_issuance`                                                                                                                                 |
| `timestamp`                         | `datetime`   | The latest timestamp when the supply value was updated                                                                                                                  |

**Example**

```json
{
  "data": {
    "token": "CSPR",
    "total": 13549811451,
    "circulating": 13087471947,
    "total_annual_issuance": 0.0821,
    "annual_ecosystem_sustain_issuance": 0.020525,
    "annual_staking_rewards_issuance": 0.061575,
    "annual_issuance": 0.0821,
    "timestamp": 1747731497
  }
}
```

## Optional properties

None

## Relations

None

## Endpoints

The `Supply` entity has the following endpoints:

* [Get supply](/rest-api/cspr-supply/get-supply.md)

## Relation endpoints

None


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