script to delete all custom metrics from a stackdriver account

delete_custom_metrics.py

#!/usr/bin/env python

from google.cloud import monitoring_v3

'''
Requires you to be logged in via `gcloud auth application-default login`.
'''

project_id = 'my-project-id' # change project id here
metrics_prefix = 'custom.googleapis.com'

client = monitoring_v3.MetricServiceClient()
project = client.project_path(project_id)

# Delete ALL custom metrics from this project.
all = client.list_metric_descriptors(project, filter_='metric.type=starts_with("'+metrics_prefix+'")')
for a in all:
    print("deleting: "+a.type)
    client.delete_metric_descriptor(a.name)
    
print("done")

Update this seems to be working more recently

#!/usr/bin/env python

from google.cloud import monitoring_v3

'''
Requires you to be logged in via `gcloud auth application-default login`.
'''

project_id = 'my-project-id' # change project id here
metrics_prefix = 'custom.googleapis.com'

client = monitoring_v3.MetricServiceClient()
project = client.common_project_path(project_id)
project_name = f"projects/{project_id}"
request = dict(
      name=project_name,
      filter=f'metric.type = starts_with("'+metrics_prefix+'")'
      )
# Delete ALL custom metrics from this project.
all = client.list_metric_descriptors(request=request)
for a in all:
    print("deleting: "+a.type)
    client.delete_metric_descriptor(name=a.name)