---
title: NATS
slug: bhdo/nats
createdAt: 2026-10-02T17:53:04.320Z
---

NATS Integration enables Belden Horizon Data Operations to connect to a NATS server.

## Supported communication

- Outbound (Publish data from Edge to NATS server) - Yes
- Inbound (Subscribe data from NATS server to Edge) - Yes

## Configurations

| **Field**                    | **Details**                                                                                                                                                                            | **Required** |
| ---------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ |
| Name                         | Name of the connector instance.                                                                                                                                                        | Yes          |
| Hostname                     | Hostname of the NATS server.                                                                                                                                                           | Yes          |
| Port                         | Port of NATS host.                                                                                                                                                                     | Yes          |
| NATS Username                | Username for authenticating with the NATS server. Leave empty if the server does not require authentication.                                                                           | No           |
| NATS Password                | Password for authenticating with the NATS server. Leave empty if the server does not require authentication.                                                                           | No           |
| Default topic name           | Default NATS subject messages are published to when no subject override is provided by the data pipeline.                                                                              | Yes          |
| Parallel Publish Count       | Number of messages published in parallel. Higher values increase throughput and resource usage.                                                                                        | Yes          |
| Enable TLS secure connection | Encrypt the connection to the NATS server using TLS. Requires a valid server certificate. Use **Insecure skip verify** to bypass certificate validation during testing.                | Yes          |
| Insecure skip verify         | `InsecureSkipVerify` controls whether a client verifies the server's certificate chain and host name.                                                                                  | No           |
| Max Reconnect                | Sets the number of reconnect attempts that will be tried before giving up. If negative, it will never give up trying to reconnect.                                                     | No           |
| Reconnect wait (second)      | ReconnectWait sets the time to backoff after attempting a reconnect to a server that we were already connected to previously.                                                          | No           |
| Connect timeout (second)     | Timeout sets the timeout for a Dial operation on a connection.                                                                                                                         | No           |
| Flush timeout (second)       | Timeout for flushing buffered messages to the server during publish operations.                                                                                                        | No           |
| Throttling limit             | Set a limit on the number of outbound messages per second. If sending data to a server that has restrictions on the rate of incoming messages, this ensures that no messages are lost. | No           |

## Persistent storage configurations

| **Field**                     | **Details**                                                                                                                                                                                          | **Required** |
| ----------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ |
| Persistent storage            | If enabled, messages in the outbound queue are stored on disk. If there are interruptions in connection or power loss, messages are retained and eventually sent when the connection is restored.    | No           |
| Persistent storage size limit | Set the size limit for storing persisted data in GB.                                                                                                                                                 | No           |
| Queue mode                    | Select the sequence of data transfer: `FIFO` or `LIFO`. Selecting `FIFO` (First In First Out) sends the earliest message first. Selecting `LIFO` (Last In First Out) sends the latest message first. | No           |