Flush Application Queue

Flushes all pending requests from an application’s queue.

Authentication: Required via API key

Idempotency:

Optional Idempotency-Key header prevents duplicate flushes on retries
Responses cached for 10 minutes per unique key

Use Cases:

Clear stuck or outdated requests from the queue
Reset queue state during development or testing
Cancel all pending requests for an application

Important:

This operation is irreversible
All pending requests in the queue will be cancelled
Requests already being processed will not be affected

DELETE

serverless

apps

{owner}

{name}

queue

Flush Application Queue

curl --request DELETE \
  --url https://api.fal.ai/v1/serverless/apps/{owner}/{name}/queue \
  --header 'Authorization: <api-key>'

{
  "error": {
    "type": "validation_error",
    "message": "Invalid request parameters"
  }
}

Authorizations

Authorization

string

header

required

API key must be prefixed with "Key ", e.g. Authorization: Key YOUR_API_KEY

Headers

Idempotency-Key

string

Optional idempotency key for safe request retries

Example:

"550e8400-e29b-41d4-a716-446655440000"

Path Parameters

owner

string

required

Username of the app owner

Example:

"user_123"

name

string

required

Application name

Example:

"my-app"

Response

Queue flushed successfully

Prometheus Metrics Returns Prometheus-compatible metrics in text format for integration into your observability stack **Authentication:** Required - Uses API key authentication **Format:** Returns text/plain in Prometheus exposition format **Common Use Cases:** - Export app stats to your observability provider (grafana, datadog etc) - Track runner health and performance - Set up alerts and monitoring See [Prometheus documentation](https://prometheus.io/docs/instrumenting/exposition_formats/) for format details.

⌘I

Flush Application Queue

curl --request DELETE \
  --url https://api.fal.ai/v1/serverless/apps/{owner}/{name}/queue \
  --header 'Authorization: <api-key>'

{
  "error": {
    "type": "validation_error",
    "message": "Invalid request parameters"
  }
}

Documentation Index

Authorizations

Headers

Path Parameters

Response