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# List supported chains

GET https://api.signum.network/chains/

Returns all chains in the LayerZero chain registry. Filter by environment (mainnet/testnet/devnet), VM type (evm/solana), or Signum deployment status. No authentication required.

Reference: https://docs.clossir.com/api-reference/api-reference/chains/get-chains

## Servers

- `https://api.signum.network` (Production, default)
- `http://localhost:5000` (Development)

## Request

### Query parameters

- `environment` (string, optional) — Filter by environment (mainnet | testnet | devnet)
- `vm_type` (string, optional) — Filter by VM type (evm | solana)
- `deployed` (string, optional) — Filter by Signum deployment status (true | false)

## Response

### 200

Response

- `chains` (list of object, required)
  - `id` (string, required) — Chain registry UUID
  - `chain_type` (string, optional, nullable)
  - `chain_key` (string, optional, nullable)
  - `chain_name` (string, optional, nullable)
  - `display_name` (string, optional, nullable)
  - `layerzero_eid` (double, optional, nullable)
  - `vm_type` (string, optional, nullable)
  - `native_chain_id` (double, optional, nullable)
  - `native_currency_symbol` (string, optional, nullable)
  - `chain_layer` (string, optional, nullable)
  - `environment` (string, optional, nullable)
  - `status` (string, optional, nullable)
  - `priority` (double, optional, nullable)
  - `is_signum_deployed` (boolean, optional, nullable)
  - `rpc_url` (string, optional, nullable)
  - `explorer_url` (string, optional, nullable)

## Examples

**Response**

```json
{
  "chains": [
    {
      "id": "string",
      "chain_type": "string",
      "chain_key": "string",
      "chain_name": "string",
      "display_name": "string",
      "layerzero_eid": 1.1,
      "vm_type": "string",
      "native_chain_id": 1.1,
      "native_currency_symbol": "string",
      "chain_layer": "string",
      "environment": "string",
      "status": "string",
      "priority": 1.1,
      "is_signum_deployed": true,
      "rpc_url": "string",
      "explorer_url": "string"
    }
  ]
}
```

**SDK Code**

```typescript TypeScript (SDK)
import { Signum } from "@signum-tech/sdk";

const signum = new Signum({
  serverURL: "https://api.signum.network",
});

const { chains } = await signum.chains.getChains();
console.log(chains);
```

```python
import requests

url = "https://api.signum.network/chains/"

response = requests.get(url)

print(response.json())
```

```go
package main

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

func main() {

	url := "https://api.signum.network/chains/"

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

	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.signum.network/chains/")

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

request = Net::HTTP::Get.new(url)

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.signum.network/chains/")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.signum.network/chains/');

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

```csharp
using RestSharp;

var client = new RestClient("https://api.signum.network/chains/");
var request = new RestRequest(Method.GET);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let request = NSMutableURLRequest(url: NSURL(string: "https://api.signum.network/chains/")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"

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()
```