# Using connectors and operations

> **This page will take you through what endpoints are involved in discovering and using connectors and their operations.** Please be sure to check out our [Building a UI form tutorial](https://tray.ai/documentation/developer/getting-started/tutorials/building-a-ui-form/) for guidance on putting it all into practice!

## Discovering connectors

The [Get connectors endpoint](https://tray.ai/documentation/developer/platform-apis/connectors#endpoint-get-connectors) will return all of the connectors that you have access to:

The response includes:

* connector name

* connector version

These can then be used with the [Get connector operations endpoint](https://tray.ai/documentation/developer/platform-apis/connectors#endpoint-get-connector-operations) to list the available operations within a particular connector.

So if your organization has access to Outreach and Twilio you would see the following:

```json
{
  "elements": [
    {
      "name": "outreach",
      "version": "3.2",
      "title": "Outreach",
      "description": ""
    },
    {
      "name": "twilio-output",
      "version": "2.1",
      "title": "Twilio",
      "description": "Cloud communication platform for developers"
    }
  ]
}
```

## Discovering operations

The operations available within a connector can be identified using the [Get connector operations endpoint](https://tray.ai/documentation/developer/platform-apis/connectors#endpoint-get-connector-operations).

So for Twilio the URL would be:

<https://api.tray.io/core/v1/connectors/twilio-output/versions/2.1/operations>

In the following sample response for Twilio, we have shown only the input schema for the 'Send SMS' operation.

You can use our [Ops Explorer dev tool](https://tray.ai/documentation/developer/developer-tools/operations-explorer) to get complete examples of operation lists and input and output schema:

```json
{
  "elements": [
    {
      "name": "send_sms",
      "title": "Send SMS",
      "description": "Send SMS.",
      "inputSchema": {
        "$schema": "https://api.tray.io/core/v1/connectors/operations/input-schema#",
        "advanced": [],
        "additionalProperties": false,
        "type": "object",
        "properties": {
          "body": {
            "type": "string",
            "description": "The body of the SMS to send.",
            "title": "Body"
          },
          "media_url": {
            "type": "string",
            "title": "Media URL",
            "description": "This parameter specifies the URL of the media you want to include with your message, for sending an MMS message."
          },
          "to": {
            "type": "string",
            "description": "The phone number (including international code) to send the sms to.",
            "title": "To"
          },
          "from": {
            "type": "string",
            "description": "The valid Twilio number (or authorised number) from which the sms message will appear.",
            "title": "From"
          },
          "status_callback": {
            "type": "string",
            "title": "Status callback URL",
            "description": "By including a StatusCallback URL in your API call, you can tell Twilio where to POST information about your message."
          }
        },
        "required": ["to", "from", "body"]
      },
      "hasDynamicOutput": false,
      "authScopes": []
    }
  ]
}
```

## Using operations

When making a call to a particular connector operation using the [Call connector endpoint](https://tray.ai/documentation/developer/platform-apis/connectors#endpoint-call-connector), the body needs to contain:

* The `operation` that is being called

* The unique `authId` which identifies the End User and their auth credentials

* The required `input` as dictated by Tray's input schema for the connector being called

## Using the Ops Explorer

Our in-browser [Ops Explorer dev tool](https://tray.ai/documentation/developer/developer-tools/operations-explorer) can help you quickly identify all of the above for any connector operation.

The following screenshot shows using it to obtain the required inputs for the Twilio 'Send SMS' operation:

![ops-explorer-twilio-example](https://tray.ai/documentation/images/developer-portal/ops-explorer-twilio-example.png "#width=70%;")

## Testing operations with the form builder demo

You can also download and run our [Form Builder demo app](https://tray.ai/documentation/developer/developer-tools/connector-tester) to connect to your Tray Embedded account and **run live tests** of any operations you wish to use.

This will show you the input payload being built, and also the response coming from Tray and the 3rd party once you hit 'submit'

We also highly recommend you follow our [Building a UI form tutorial](https://tray.ai/documentation/developer/getting-started/tutorials/building-a-ui-form/) which explains how this was built and will give you a great headstart in building your own integrations:

![form-builder-twilio-example](https://tray.ai/documentation/images/developer-portal/form-builder-twilio-example.png "#width=70%;")