# List Atlas clusters in a project

**GET /api/v1/atlas/projects/{project_id}/clusters**

Proxies Atlas Admin API GET /groups/{id}/clusters and GET /groups/{id}/flexClusters using a human caller's delegated token or a paired Agent Engine service account. Agent Engine API keys are not accepted. Invalid project_id is rejected before any Atlas call.


## Servers
- https://agentengine.mongodb.com: https://agentengine.mongodb.com ()


## Authentication methods
- Bearer auth


## Parameters

### Path parameters

- **project_id** (string)
  Atlas project ID




## Responses
### 406
Unsupported or malformed API version, an operation unavailable in the selected published contract, or an unacceptable representation (including unsupported media-type parameters or excluded SSE). Existing authentication, authorization, and rate-limit failures take precedence.

#### Body: application/json (object)
- **badRequestDetail** (object)
  Optional validation details defined by the standard error schema; API negotiation errors do not emit this field.

- **detail** (string)
  Human-readable error details.

- **error** (integer)
  HTTP status code.

- **errorCode** (string)
  Machine-readable error code.

- **parameters** (array[string])
  Request parameter names associated with the error; omitted when none apply.

- **reason** (string)
  HTTP status reason phrase.


### 200
OK

#### Body: application/json (object)
- **results** (array[object])

- **total_count** (integer)


### 400
INVALID_ID — project_id is not a 24-hex Atlas project ID

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

- **error** (string)

- **success** (boolean)


### 401
PLATFORM_OAUTH_REQUIRED or PLATFORM_OAUTH_RESOURCE_REJECTED

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

- **error** (string)

- **success** (boolean)


### 402
ATLAS_PAYMENT_METHOD_REQUIRED

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

- **error** (string)

- **success** (boolean)


### 403
ATLAS_PERMISSION_REQUIRED, ATLAS_SERVICE_ACCOUNT_NOT_PAIRED, or FORBIDDEN

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

- **error** (string)

- **success** (boolean)


### 404
NOT_FOUND

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

- **error** (string)

- **success** (boolean)


### 409
Conflict

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

- **error** (string)

- **success** (boolean)


### 500
INTERNAL_ERROR

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

- **error** (string)

- **success** (boolean)


### 502
Atlas unreachable / non-OK response

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

- **error** (string)

- **success** (boolean)


### 503
PLATFORM_OAUTH_NOT_CONFIGURED or SERVICE_UNAVAILABLE when a delegated token refresh is already in progress

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

- **error** (string)

- **success** (boolean)



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