# List active alerts

**GET /alerts**

Retrieves active alerts from Mimir for the caller's scope, paginated and sorted
by `startsAt` descending (fingerprint as tiebreaker for stable pagination).

Scope follows the same three modes as `/alerts/totals`:
- `organization_id` omitted → caller's full hierarchy (cross-tenant fan-out).
- `organization_id=X` → single tenant `X`.
- `organization_id=X&include=descendants` → `X` plus its sub-tree.

All filter params support **multiple values** (repeat the param): values within
the same filter are matched as OR; different filters AND together. Example:
`?severity=critical&severity=warning&alertname=CVE-2024-1234` returns
CVE-2024-1234 alerts that are critical or warning.

Per-tenant failures during fan-out (timeout, 5xx) are non-fatal: the rest of the
result is returned and the failure is reported in the `warnings` array.



## Servers
- Backend API server (port 8080): https://api.your-domain.com/api (Backend API server (port 8080))
- Collect API server (port 8081): https://collect.your-domain.com/api (Collect API server (port 8081))


## Authentication methods
- Bearer auth


## Parameters


### Query parameters
- **organization_id** (string)
  Target organization ID. Optional for all roles except Customer (where it is ignored).
- **include** (string)
  Set to `descendants` together with `organization_id` to drill down on a sub-tree.
- **page** (integer)
  1-based page number.
- **page_size** (integer)
  Page size. Default 50, max 100.
- **state** (array[string])
  Filter alerts by state. Supports multiple values.
- **severity** (array[string])
  Filter alerts by severity label. Supports multiple values.
- **system_key** (array[string])
  Filter alerts by system_key label. Supports multiple values.
- **alertname** (array[string])
  Filter alerts by alertname label (the alert "type" — e.g. `HighCPU`,
  `DiskFull`, `CVE-2024-1234`). Supports multiple values.


## Responses
### 200
Paginated list of active alerts

#### Body: application/json (object)
- **code** (integer)

- **message** (string)

- **data** (object)


### 400
Bad request - validation error

#### Body: application/json (object)
- **code** (integer)
  HTTP error code
- **message** (string)
  Error message
- **data** (object)


### 401
Unauthorized - invalid or missing token

#### Body: application/json (object)
- **code** (integer)

- **message** (string)

- **data** (object | null)


### 403
Forbidden - insufficient permissions

#### Body: application/json (object)
- **code** (integer)

- **message** (string)

- **data** (object | null)


### 500
Internal server error

#### Body: application/json (object)
- **code** (integer)

- **message** (string)

- **data** (object | null)



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