# List Project Billing Fields

**GET** `/v1/projects/{project_id}/billing/fields`

Lists the accessors, deployment types, tags, and line items used for billing data in the specified time period. Use this endpoint if you want to filter your results from the Billing Breakdown endpoint and want to know what filters are available.

Base URL: `https://agent.deepgram.com`

Tags: `fields`

## Authorization

| Option | Scheme | Type | Sent as | Scopes |
| --- | --- | --- | --- | --- |
| Option 1 | `ApiKeyAuth` | `apiKey` | header `Authorization` | — |

## Path parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `project_id` | `string` | Yes | The unique identifier of the project |

## Query parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `start` | `string` (date) | No | Start date of the requested date range. Format accepted is YYYY-MM-DD |
| `end` | `string` (date) | No | End date of the requested date range. Format accepted is YYYY-MM-DD |

## Responses

| Status | Description | Media type |
| --- | --- | --- |
| `200` | A list of billing fields for a specific project | `application/json` |
| `400` | Invalid Request | `application/json` |

### Example response: 200 — A list of billing fields for a specific project

```json
{
  "accessors": [
    "00000000-0000-0000-0000-000000000000"
  ],
  "deployments": [
    "beta"
  ],
  "line_items": {
    "additionalProp1": "string"
  },
  "tags": [
    "string"
  ]
}
```

### Example response: 400 — Invalid Request

```json
{
  "err_code": "string",
  "err_msg": "string",
  "request_id": "string"
}
```

## Related pages

- [Analyze text content](./text_analyze.md)
- [audio](./tags/audio.md)
- [balances](./tags/balances.md)
- [breakdown](./tags/breakdown.md)
- [configurations](./tags/configurations.md)
- [Create a Project Invite](./invites_create.md)
- [Create a Project Key](./keys_create.md)
- [Create a Project Self-Hosted Distribution Credential](./distributioncredentials_create.md)
- [Create an Agent Configuration](./configurations_create.md)
- [Create an Agent Variable](./variables_create.md)

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