---
title: JSON configuration for REST API flow control
description: API Security Enforcer (ASE) flow control is configured separately for each API using the API JSON file.
component: pingintelligence
version: 5.2
page_id: pingintelligence:pingintelligence_reference_guide:pingintelligence_json_configuration_rest_api_flow_control
canonical_url: https://docs.pingidentity.com/pingintelligence/5.2/pingintelligence_reference_guide/pingintelligence_json_configuration_rest_api_flow_control.html
revdate: May 6, 2024
---

# JSON configuration for REST API flow control

API Security Enforcer (ASE) flow control is configured separately for each API using the API JSON file.

The following example shows the flow control-related definitions in an API JSON file:

```json
{
 "api_metadata": {
 "protocol": "http",

 "flow_control": {
 "client_spike_threshold": "0/second",
 "server_connection_queueing" : false
 },
 "servers": [
 {
 "host": "127.0.0.1",
 "port": 8080,
 "server_spike_threshold": "100/second",
 "server_connection_quota": 20
 },
 {
 "host": "127.0.0.1",
 "port": 8081,
 "server_spike_threshold": "200/second",
 "server_connection_quota": 40
 }
 ]
 }
}
```

The flow control section includes definitions that apply globally across the API definition and include the `client_spike_threshold` and `server_connection_queueing` parameters. Server specific definitions include the `server_spike_threshold` and `server_connection_quota` parameters, which are configured on each individual server. The default is no flow control with all values set to 0.

You can specify different values for each server for `server_connection_quota` and `server_spike_threshold`.

|   |                                                                                                                            |
| - | -------------------------------------------------------------------------------------------------------------------------- |
|   | If server connection quota is set to 0 for one server, then it must be 0 for all other servers in the API JSON definition. |