## Usage

```
npx wgc subgraph introspect --routing-url [url] --header [headers...]
```

## Description

The `npx wgc subgraph introspect` command allows you to introspect a subgraph and returns the schema of the subgraph.

## **Options**

- `--routing-url`: Set the URL for the subgraph’s data source. This URL defines the endpoint where the subgraph will fetch data from.  
  - Example: `--routing-url http://localhost:4001/graphql`
- `--header`: The headers to apply when the subgraph is introspected. This is used for authentication and authorization. The headers are passed in the format <key>=<value> <key>=<value>. Use quotes if there exists space in the key/value.  
  - Example: `--header Authorization='Bearer <token>'`
- `-o, --out` : Destination file for the SDL. Prints to standard output if not provided.

## **Example**

1. Introspect a subgraph with routing URL “ [http://localhost:4001/graphql](http://localhost:4001/graphql)”:

```
npx wgc subgraph introspect --routing-url http://localhost:4001/graphql
```