# pulsar

> For the complete documentation index, see [llms.txt](https://docs.redpanda.com/llms.txt). Component-specific: [connect-full.txt](https://docs.redpanda.com/connect-full.txt)

---
title: pulsar
latest-connect-version: 4.93.0
latest-operator-version: v26.1.4
latest-console-tag: v3.7.3
latest-redpanda-tag: v26.1.9
docname: outputs/pulsar
page-component-name: connect
page-version: master
page-component-version: master
page-component-title: Connect
page-relative-src-path: outputs/pulsar.adoc
page-edit-url: https://github.com/redpanda-data/rp-connect-docs/edit/main/modules/components/pages/outputs/pulsar.adoc
page-git-created-date: "2024-05-24"
page-git-modified-date: "2026-05-26"
---

<!-- Source: https://docs.redpanda.com/connect/components/outputs/pulsar.md -->

**Type:** Output ▼

[Output](https://docs.redpanda.com/connect/components/outputs/pulsar/)[Input](https://docs.redpanda.com/connect/components/inputs/pulsar/)

**Available in:** Self-Managed

Write messages to an Apache Pulsar server.

Introduced in version 3.43.0.

#### Common

```yml
outputs:
  label: ""
  pulsar:
    url: "" # No default (required)
    topic: "" # No default (required)
    tls:
      root_cas_file: ""
    key: ""
    ordering_key: ""
    max_in_flight: 64
```

#### Advanced

```yml
outputs:
  label: ""
  pulsar:
    url: "" # No default (required)
    topic: "" # No default (required)
    tls:
      root_cas_file: ""
    key: ""
    ordering_key: ""
    max_in_flight: 64
    auth:
      oauth2:
        enabled: false
        audience: ""
        issuer_url: ""
        scope: ""
        private_key_file: ""
      token:
        enabled: false
        token: ""
```

## [](#fields)Fields

### [](#auth)`auth`

Optional configuration of Pulsar authentication methods.

Requires version 3.60.0 or later.

**Type**: `object`

### [](#auth-oauth2)`auth.oauth2`

Parameters for Pulsar OAuth2 authentication.

**Type**: `object`

### [](#auth-oauth2-audience)`auth.oauth2.audience`

OAuth2 audience.

**Type**: `string`

**Default**: `""`

### [](#auth-oauth2-enabled)`auth.oauth2.enabled`

Whether OAuth2 is enabled.

**Type**: `bool`

**Default**: `false`

### [](#auth-oauth2-issuer_url)`auth.oauth2.issuer_url`

OAuth2 issuer URL.

**Type**: `string`

**Default**: `""`

### [](#auth-oauth2-private_key_file)`auth.oauth2.private_key_file`

The path to a file containing a private key.

**Type**: `string`

**Default**: `""`

### [](#auth-oauth2-scope)`auth.oauth2.scope`

OAuth2 scope to request.

**Type**: `string`

**Default**: `""`

### [](#auth-token)`auth.token`

Parameters for Pulsar Token authentication.

**Type**: `object`

### [](#auth-token-enabled)`auth.token.enabled`

Whether Token Auth is enabled.

**Type**: `bool`

**Default**: `false`

### [](#auth-token-token)`auth.token.token`

Actual base64 encoded token.

**Type**: `string`

**Default**: `""`

### [](#key)`key`

An optional key to populate for each message. This field supports [interpolation functions](https://docs.redpanda.com/connect/configuration/interpolation/#bloblang-queries).

**Type**: `string`

**Default**: `""`

### [](#max_in_flight)`max_in_flight`

The maximum number of messages to have in flight at a given time. Increase this to improve throughput.

**Type**: `int`

**Default**: `64`

### [](#ordering_key)`ordering_key`

The ordering key to publish messages with. This field supports [interpolation functions](https://docs.redpanda.com/connect/configuration/interpolation/#bloblang-queries).

**Type**: `string`

**Default**: `""`

### [](#tls)`tls`

Specify the path to a custom CA certificate to trust broker TLS service.

**Type**: `object`

### [](#tls-root_cas_file)`tls.root_cas_file`

An optional path of a root certificate authority file to use. This is a file, often with a .pem extension, containing a certificate chain from the parent trusted root certificate, to possible intermediate signing certificates, to the host certificate.

**Type**: `string`

**Default**: `""`

```yaml
# Examples:
root_cas_file: ./root_cas.pem
```

### [](#topic)`topic`

The topic to publish to.

**Type**: `string`

### [](#url)`url`

A URL to connect to.

**Type**: `string`

```yaml
# Examples:
url: pulsar://localhost:6650

# ---

url: pulsar://pulsar.us-west.example.com:6650

# ---

url: pulsar+ssl://pulsar.us-west.example.com:6651
```