# Schema Registries

{% hint style="success" %}
See [provisioning](https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/automation/README.md) for automating connections.

Consider [Rate Limiting](https://github.com/lensesio-dev/docs/blob/master/deployment/prepare-your-environment/rate-limiting.md) if you have a high number of schemas.
{% endhint %}

Lenses can work with the following schema registry implementations which can be added via the **`Connections`** page in Lenses.

Go to **Admin->Connections->New Connections->Schema Registry** and follow the guide for your registry provider.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>AWS Glue</strong></td><td>Connect Lenses to your AWS Glue service for schema registry support.</td><td></td><td><a href="https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/schemas-registries/aws-glue.md">https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/schemas-registries/aws-glue.md</a></td></tr><tr><td><strong>Confluent</strong></td><td>Connect Lenses to Confluent Schema Registry.</td><td></td><td><a href="https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/schemas-registries/confluent.md">https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/schemas-registries/confluent.md</a></td></tr><tr><td><strong>IBM Event Streams</strong></td><td>Connect Lenses to IBM Event Streams Schema Registry</td><td></td><td><a href="https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/schemas-registries/ibm-event-streams-registry.md">https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/schemas-registries/ibm-event-streams-registry.md</a></td></tr><tr><td><strong>Apicurio</strong></td><td>Connect Lenses to Apicurio.</td><td></td><td><a href="https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/schemas-registries/apicurio.md">https://github.com/lensesio-dev/docs/blob/master/getting-started/connections/schemas-registries/apicurio.md</a></td></tr></tbody></table>

## Authentication

TLS and basic authentication are supported for connections to Schema Registries.

## JMX Metrics

Lenses can collect Schema registry metrics via:

1. JMX
2. Jolokia

## Supported formats

* AVRO
* PROTOBUF

{% hint style="warning" %}
JSON and XML formats are supported by Lenses but without a backing schema registry.
{% endhint %}

To connect your Schema Registry with Lenses, select **Schema Registry -> Create Connection.**

## Schema deletion

To enable the deletion of schemas in the UI, set the following in the **`lenses.conf`** file.

```bash
## Enable schema deletion in the Lenses UI
## default: false
lenses.schema.registry.delete = true

## When a topic is deleted,
## automatically delete also its associated Schema Registry subjects
## default: false
lenses.schema.registry.cascade.delete = true
```

{% hint style="danger" %}
IBM Event Streams supports hard deletes only
{% endhint %}


---

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