# Using the GraphiQL Explorer

Prismatic's [GraphiQL explorer](https://prismatic.io/docs/explorer) lets you test queries against the Prismatic API. If you are logged in to the web application, you can perform authenticated queries against Prismatic's GraphQL API using the GraphiQL explorer.

![Screenshot of the Prismatic GraphiQL Explorer Tool](/docs/img/api/graphql-explorer.png)

Open the **Explorer** sidebar for a full reference of all **queries** and **mutations** that you can run.

## Other GraphQL clients[​](#other-graphql-clients "Direct link to Other GraphQL clients")

Other GraphQL clients can be used to query Prismatic's API:

* [Google Chrome extension from Altair](https://chrome.google.com/webstore/detail/altair-graphql-client/flnheeellpciglgpaodhkhmapeljopja)
* [Apollo Client Developer Tools extension](https://chromewebstore.google.com/detail/apollo-client-devtools/jdkknkkbebbapilgoeccciglkfbmbnfm)
* [Postman](https://www.postman.com/)

To query Prismatic's GraphQL API with these tools, [generate an API key](https://prismatic.io/docs/api/authentication.md) and ensure that the API key is passed as an Authorization bearer token:

```
{ "Authorization": "Bearer {{TOKEN}}" }
```

For API endpoint, enter `https://app.prismatic.io/api`.
