> ## Documentation Index
> Fetch the complete documentation index at: https://www.marqeta.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Simulate ping

> To perform an echo test, send a POST request to the /ping endpoint.

POST/ping

To perform an echo test, send a `POST` request to the `/ping` endpoint.

## Body field details

| Fields | Description |
| - | - |
| token string  Optional | A pass-through field, enter any data. **Allowable Values:**  36 char max |
| payload string  Optional | Sample data. **Allowable Values:**  255 char max |

## Sample request body

```json JSON lines wrap theme={null}
{
  "token": "12345",
  "payload": "This is my payload"
}
```

## Sample response body

```json JSON lines wrap theme={null}
{
  "success": true,
  "id": "12345",
  "payload": "This is my payload"
}
```


## Related topics

- [Validating Connectivity Overview](https://www.marqeta.com/docs/core-api/validating-connectivity.md)
- [Ping webhook](https://www.marqeta.com/docs/core-api/webhooks/ping.md)
- [Perform ping](https://www.marqeta.com/docs/core-api/validating-connectivity/perform-ping.md)
- [Webhooks Overview](https://www.marqeta.com/docs/core-api/webhooks.md)
- [Errors](https://www.marqeta.com/docs/core-api/errors.md)