> ## Documentation Index > Fetch the complete documentation index at: https://fal.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # 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prevents duplicate flushes on retries - Responses cached for 10 minutes per unique key **Use Cases:** - Clear stuck or outdated requests from the queue - Reset queue state during development or testing - Cancel all pending requests for an application **Important:** - This operation is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 ## OpenAPI ````yaml /api-reference/platform-apis/openapi/v1.json delete /serverless/apps/{owner}/{name}/queue openapi: 3.1.0 info: title: Platform APIs version: v1 description: fal REST API for programmatic access to platform resources. servers: - url: https://api.fal.ai/v1 description: Production server security: [] paths: /serverless/apps/{owner}/{name}/queue: delete: tags: - Serverless - Apps summary: Flush Application Queue description: >- 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prevents duplicate flushes on retries - Responses cached for 10 minutes per unique key **Use Cases:** - Clear stuck or outdated requests from the queue - Reset queue state during development or testing - Cancel all pending requests for an application **Important:** - This operation is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 operationId: serverlessFlushAppQueue parameters: - schema: type: string description: Username of the app owner example: user_123 required: true description: Username of the app owner name: owner in: path - schema: type: string description: Application name example: my-app required: true description: Application name name: name in: path - schema: type: string description: Optional idempotency key for safe request retries example: 550e8400-e29b-41d4-a716-446655440000 required: false description: Optional idempotency key for safe request retries name: Idempotency-Key in: header responses: '204': description: Queue flushed successfully '400': description: Invalid request parameters content: application/json: schema: type: object properties: error: type: object properties: type: type: string enum: - authorization_error - validation_error - not_found - rate_limited - server_error - not_implemented description: The category of error that occurred message: type: string description: Human-readable error message docs_url: type: string format: uri description: Link to relevant documentation request_id: type: string description: Unique request identifier for debugging required: - type - message description: Error details required: - error description: Standard error response format example: error: type: validation_error message: Invalid request parameters '401': description: Authentication required content: application/json: schema: type: object properties: error: type: object properties: type: type: string enum: - authorization_error - validation_error - not_found - rate_limited - server_error - not_implemented description: The category of error that occurred message: type: string description: Human-readable error message docs_url: type: string format: uri description: Link to relevant documentation request_id: type: string description: Unique request identifier for debugging required: - type - message description: Error details required: - error description: Standard error response format example: error: type: authorization_error message: Authentication required '403': description: Access denied content: application/json: schema: type: object properties: error: type: object properties: type: type: string enum: - authorization_error - validation_error - not_found - rate_limited - server_error - not_implemented description: The category of error that occurred message: type: string description: Human-readable error message docs_url: type: string format: uri description: Link to relevant documentation request_id: type: string description: Unique request identifier for debugging required: - type - message description: Error details required: - error description: Standard error response format example: error: type: authorization_error message: Access denied '404': description: Resource not found content: application/json: schema: type: object properties: error: type: object properties: type: type: string enum: - authorization_error - validation_error - not_found - rate_limited - server_error - not_implemented description: The category of error that occurred message: type: string description: Human-readable error message docs_url: type: string format: uri description: Link to relevant documentation request_id: type: string description: Unique request identifier for debugging required: - type - message description: Error details required: - error description: Standard error response format example: error: type: not_found message: Resource not found '429': description: Rate limit exceeded content: application/json: schema: type: object properties: error: type: object properties: type: type: string enum: - authorization_error - validation_error - not_found - rate_limited - server_error - not_implemented description: The category of error that occurred message: type: string description: Human-readable error message docs_url: type: string format: uri description: Link to relevant documentation request_id: type: string description: Unique request identifier for debugging required: - type - message description: Error details required: - error description: Standard error response format example: error: type: rate_limited message: Rate limit exceeded '500': description: Internal server error content: application/json: schema: type: object properties: error: type: object properties: type: type: string enum: - authorization_error - validation_error - not_found - rate_limited - server_error - not_implemented description: The category of error that occurred message: type: string description: Human-readable error message docs_url: type: string format: uri description: Link to relevant documentation request_id: type: string description: Unique request identifier for debugging required: - type - message description: Error details required: - error description: Standard error response format example: error: type: server_error message: An unexpected error occurred security: - apiKey: [] components: securitySchemes: apiKey: type: apiKey in: header name: Authorization description: >- API key must be prefixed with "Key ", e.g. Authorization: Key YOUR_API_KEY ````