> ## Documentation Index
> Fetch the complete documentation index at: https://kb.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get the list of namespaces for the mtls authentication credential

## OpenAPI

````json GET /mtls-authentication-credentials/{guid}/namespaces
{
  "openapi": "3.0.3",
  "info": {
    "title": "VAST DataEngine API",
    "description": "Combined OpenAPI specification for Document360: Provisioning, Telemetries Query, Telemetries Collector, and shared common components.",
    "version": "1.4.0"
  },
  "servers": [
    {
      "url": "http://localhost:3000",
      "description": "Provisioning Service (Local development server)"
    },
    {
      "url": "http://localhost:8080/query_telemetries",
      "description": "Telemetries Query Service (Local development server)"
    },
    {
      "url": "http://localhost:8080/telemetries",
      "description": "Telemetries Collector Service (Local development server)"
    }
  ],
  "tags": [
    {
      "name": "Provisioning Service v1.4.0",
      "description": "Provisioning Service API"
    },
    {
      "name": "Provisioning Service v1.4.0 > dataEngine",
      "description": "Data Engine lifecycle"
    },
    {
      "name": "Provisioning Service v1.4.0 > setup_provisioning",
      "description": "Deprecated provisioning setup"
    },
    {
      "name": "Provisioning Service v1.4.0 > pipelines",
      "description": "Pipelines"
    },
    {
      "name": "Provisioning Service v1.4.0 > pipelineRevisions",
      "description": "Pipeline revisions"
    },
    {
      "name": "Provisioning Service v1.4.0 > functions",
      "description": "Functions"
    },
    {
      "name": "Provisioning Service v1.4.0 > functionRevisions",
      "description": "Function revisions"
    },
    {
      "name": "Provisioning Service v1.4.0 > functionRevisionsDeprecated",
      "description": "Deprecated function revision endpoints"
    },
    {
      "name": "Provisioning Service v1.4.0 > triggers",
      "description": "Triggers"
    },
    {
      "name": "Provisioning Service v1.4.0 > topics",
      "description": "Topics"
    },
    {
      "name": "Provisioning Service v1.4.0 > containerRegistries",
      "description": "Container registries"
    },
    {
      "name": "Provisioning Service v1.4.0 > kubernetesClusters",
      "description": "Kubernetes clusters"
    },
    {
      "name": "Provisioning Service v1.4.0 > kubernetesSecrets",
      "description": "Kubernetes secrets"
    },
    {
      "name": "Provisioning Service v1.4.0 > mtlsAuthenticationCredentials",
      "description": "mTLS authentication credentials"
    },
    {
      "name": "Provisioning Service v1.4.0 > dashboard",
      "description": "Dashboard"
    },
    {
      "name": "Provisioning Service v1.4.0 > reports",
      "description": "Saved reports"
    },
    {
      "name": "Telemetries Collector Service v1.4.0",
      "description": "API for collecting OTEL signals (traces, logs and metrics)"
    },
    {
      "name": "Telemetries Collector Service v1.4.0 > collect_telemetries",
      "description": "Collect OTEL signals"
    },
    {
      "name": "Telemetries Query Service v1.4.0",
      "description": "API for querying traces, logs and metrics"
    },
    {
      "name": "Telemetries Query Service v1.4.0 > query_telemetries",
      "description": "Query traces and logs"
    },
    {
      "name": "Telemetries Query Service v1.4.0 > metrics",
      "description": "Query metrics"
    },
    {
      "name": "Telemetries Query Service v1.4.0 > reports",
      "description": "Saved reports"
    }
  ],
  "paths": {
    "/mtls-authentication-credentials/{guid}/namespaces": {
      "parameters": [
        {
          "$ref": "#/components/parameters/GUID"
        },
        {
          "$ref": "#/components/parameters/KubeURL"
        }
      ],
      "get": {
        "summary": "Get the list of namespaces for the mtls authentication credential.",
        "operationId": "MtlsAuthenticationCredentialNamespaces",
        "tags": [
          "Provisioning Service v1.4.0 > mtlsAuthenticationCredentials"
        ],
        "responses": {
          "200": {
            "description": "List of namespaces available to this mtls authentication credential.",
            "content": {
              "application/json": {
                "schema": {
                  "type": "array",
                  "items": {
                    "type": "string",
                    "description": "Namespaces"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "parameters": {
      "GUID": {
        "name": "guid",
        "in": "path",
        "required": "true",
        "schema": {
          "type": "string"
        }
      },
      "KubeURL": {
        "name": "kube_api_url",
        "in": "query",
        "required": "true",
        "schema": {
          "type": "string"
        }
      }
    }
  }
}
````