# List metrics

> The metrics a project's software has sent: each with its name, kind (gauge, sum, histogram or summary), unit, description, the services that send it and when it last did.

<div class="g1t-endpoint"><span class="g1t-method" data-method="get">GET</span><code>/workspaces/{workspace}/projects/{project}/observability/metrics</code></div>

Needs a role on the project's repository.

- **Authentication:** Required. Send an [access token](/reference/api/#authentication) as `Authorization: Bearer`.
- **MCP tool:** [`observability`](/reference/mcp/#observability) with `action` `metrics`, and the same inputs
- **Scope:** An access token needs [`observability:read`](/guides/authentication/#scopes).

## Path parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `workspace` | string | Yes | The workspace's slug, e.g. "flagon-io". |
| `project` | string | Yes | The project's slug, as in g1t.sh/{workspace}/{project}. |

## Example request

```sh
curl https://api.g1t.sh/workspaces/flagon-io/projects/g1t/observability/metrics \
  -H "Authorization: Bearer $G1T_TOKEN"
```

## Example response

A successful request answers `200` with:

```json
[
  {
    "name": "http.server.request.duration",
    "kind": "histogram",
    "unit": "s",
    "description": "Duration of HTTP server requests.",
    "services": [
      "g1t-api"
    ],
    "last_us": 1791813800000000
  },
  {
    "name": "queue.depth",
    "kind": "gauge",
    "unit": "{message}",
    "description": "Messages waiting.",
    "services": [
      "g1t-work"
    ],
    "last_us": 1791813780000000
  }
]
```

## Errors

A failed request answers with one of these statuses and a body like `{"error": {"code": "not_found", "message": "Repository not found."}}`. See [errors](/reference/api/#errors).

| Status | Code | When |
| --- | --- | --- |
| 401 | `unauthenticated` | A token is required, or the one sent is not valid. |
| 403 | `forbidden` | The token is valid but not allowed to do this, such as a member-only change, or a token without the scope it needs. |
| 404 | `not_found` | It does not exist, or you cannot see it. |
| 422 | `invalid` | The input is not valid. `message` says which field and why. |