# Using Postman

This guide will help you use the Indexer API with Postman.

### Step 1: Open Postman

Launch the Postman application on your computer.

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### Step 2: Select the GraphQL Endpoint

In Postman, choose the **GraphQL** request type.

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### Step 3: Choose the Environment URL

Select the environment you want to connect to and use the corresponding API endpoint:

| Network | API Endpoint |
|  --- | --- |
| Mainnet | https://api.mainnet.kadindexer.io/v1 |
| Testnet | https://api.testnet.kadindexer.io/v1 |


Paste the chosen URL into the request URL field as shown below:

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### Step 4: Add Your API Key

Use the API key you generated earlier. Create a new header entry in Postman to include it, as shown below:

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### Step 5: Introspect the Schema

Click **Introspect Schema** to load all available queries from the GraphQL endpoint.

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### Step 6: Run Your First Query

You are now ready to send requests. Choose a query and execute it, as shown in the example below:

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Once you have introspected the schema, you can explore all the other available queries and build requests interactively.