---
layout: api
page_title: /sys/loggers - HTTP API
description: The `/sys/loggers` endpoint is used modify the verbosity level of logging.
---

# `/sys/loggers`

The `/sys/loggers` endpoint is used modify the verbosity level of logging.

!> **NOTE:** Changes made to the log level using this endpoint are not persisted and will be restored 
to either the default log level (info) or the level specified using `log_level` in vault.hcl or the `VAULT_LOG_LEVEL` 
environment variable once the Vault service is reloaded or restarted.

## Modify verbosity level of all loggers

| Method  | Path           |
| :------ | :------------- |
| `POST`  | `/sys/loggers` |

### Parameters

- `level` `(string: <required>)` – Specifies the log verbosity level to be set for all loggers.
Supported values (in order of detail) are `"trace"`, `"debug"`, `"info"`, `"warn"`, and `"error"`.

### Sample Payload

```json
{
  "level": "debug",
}
```

### Sample Request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/sys/loggers
```

## Modify verbosity level of a single logger

| Method  | Path                 |
| :------ | :------------------- |
| `POST`  | `/sys/loggers/:name` |

### Parameters

- `name` `(string: <required>)` – Specifies the logger to be modified (e.g. `audit`, `core`, `expiration`).
- `level` `(string: <required>)` – Specifies the log verbosity level to be set for the provided logger.
Supported values (in order of detail) are `"trace"`, `"debug"`, `"info"`, `"warn"`, and `"error"`.

### Sample Payload

```json
{
  "level": "debug",
}
```

### Sample Request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/sys/loggers/core
```

## Revert verbosity of all loggers to configured level

| Method    | Path           |
| :-------- | :------------- |
| `DELETE`  | `/sys/loggers` |

### Sample Request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/sys/loggers
```

## Revert verbosity of a single logger to configured level

| Method    | Path                 |
| :-------- | :------------------- |
| `DELETE`  | `/sys/loggers/:name` |

### Parameters

- `name` `(string: <required>)` – Specifies the logger to be modified (e.g. `audit`, `core`, `expiration`).

### Sample Request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/sys/loggers/core
```