# getChains

GET https://api.0x.org/gasless/chains

Get list of supported chains for gasless

Reference: https://docs.0x.org/api-reference/openapi-yaml/gasless/chains

## OpenAPI Specification

```yaml
openapi: 3.1.1
info:
  title: getChains
  version: endpoint_gasless.chains
paths:
  /gasless/chains:
    get:
      operationId: chains
      summary: getChains
      description: Get list of supported chains for gasless
      tags:
        - - subpackage_gasless
      parameters:
        - name: 0x-api-key
          in: header
          description: Visit dashboard.0x.org to get your API Key
          required: true
          schema:
            type: string
        - name: 0x-version
          in: header
          description: API version
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Gasless_chains_Response_200'
        '500':
          description: 500 error response
          content: {}
components:
  schemas:
    GaslessChainsGetResponsesContentApplicationJsonSchemaChainsItems:
      type: object
      properties:
        chainId:
          type: number
          format: double
        chainName:
          type: string
      required:
        - chainId
        - chainName
    Gasless_chains_Response_200:
      type: object
      properties:
        chains:
          type: array
          items:
            $ref: >-
              #/components/schemas/GaslessChainsGetResponsesContentApplicationJsonSchemaChainsItems
        zid:
          type: string
          description: The unique ZeroEx identifier of the request
      required:
        - chains
        - zid

```

## SDK Code Examples

```python
import requests

url = "https://api.0x.org/gasless/chains"

payload = {}
headers = {
    "0x-api-key": "0x-api-key",
    "0x-version": "v2",
    "Content-Type": "application/json"
}

response = requests.get(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://api.0x.org/gasless/chains';
const options = {
  method: 'GET',
  headers: {
    '0x-api-key': '0x-api-key',
    '0x-version': 'v2',
    'Content-Type': 'application/json'
  },
  body: '{}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.0x.org/gasless/chains"

	payload := strings.NewReader("{}")

	req, _ := http.NewRequest("GET", url, payload)

	req.Header.Add("0x-api-key", "0x-api-key")
	req.Header.Add("0x-version", "v2")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.0x.org/gasless/chains")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["0x-api-key"] = '0x-api-key'
request["0x-version"] = 'v2'
request["Content-Type"] = 'application/json'
request.body = "{}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://api.0x.org/gasless/chains")
  .header("0x-api-key", "0x-api-key")
  .header("0x-version", "v2")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.0x.org/gasless/chains', [
  'body' => '{}',
  'headers' => [
    '0x-api-key' => '0x-api-key',
    '0x-version' => 'v2',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.0x.org/gasless/chains");
var request = new RestRequest(Method.GET);
request.AddHeader("0x-api-key", "0x-api-key");
request.AddHeader("0x-version", "v2");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "0x-api-key": "0x-api-key",
  "0x-version": "v2",
  "Content-Type": "application/json"
]
let parameters = [] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.0x.org/gasless/chains")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```