curl --request POST \
  --url https://api-partner.houdiniswap.com/v2/dex/chainSignatures \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "quoteId": "69a02882f48d56c923119d95",
  "addressFrom": "0xb7dE6b6eEBF7401aFea5a49D6405C9048fEf2d40",
  "previousSignature": {
    "signature": "<string>",
    "key": "<string>",
    "swapRequiredMetadata": {}
  },
  "signatureKey": "permit",
  "signatureStep": 1
}
'

import requests

url = "https://api-partner.houdiniswap.com/v2/dex/chainSignatures"

payload = {
    "quoteId": "69a02882f48d56c923119d95",
    "addressFrom": "0xb7dE6b6eEBF7401aFea5a49D6405C9048fEf2d40",
    "previousSignature": {
        "signature": "<string>",
        "key": "<string>",
        "swapRequiredMetadata": {}
    },
    "signatureKey": "permit",
    "signatureStep": 1
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    quoteId: '69a02882f48d56c923119d95',
    addressFrom: '0xb7dE6b6eEBF7401aFea5a49D6405C9048fEf2d40',
    previousSignature: {signature: '<string>', key: '<string>', swapRequiredMetadata: {}},
    signatureKey: 'permit',
    signatureStep: 1
  })
};

fetch('https://api-partner.houdiniswap.com/v2/dex/chainSignatures', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api-partner.houdiniswap.com/v2/dex/chainSignatures",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'quoteId' => '69a02882f48d56c923119d95',
    'addressFrom' => '0xb7dE6b6eEBF7401aFea5a49D6405C9048fEf2d40',
    'previousSignature' => [
        'signature' => '<string>',
        'key' => '<string>',
        'swapRequiredMetadata' => [
                
        ]
    ],
    'signatureKey' => 'permit',
    'signatureStep' => 1
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api-partner.houdiniswap.com/v2/dex/chainSignatures"

	payload := strings.NewReader("{\n  \"quoteId\": \"69a02882f48d56c923119d95\",\n  \"addressFrom\": \"0xb7dE6b6eEBF7401aFea5a49D6405C9048fEf2d40\",\n  \"previousSignature\": {\n    \"signature\": \"<string>\",\n    \"key\": \"<string>\",\n    \"swapRequiredMetadata\": {}\n  },\n  \"signatureKey\": \"permit\",\n  \"signatureStep\": 1\n}")

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

	req.Header.Add("Authorization", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api-partner.houdiniswap.com/v2/dex/chainSignatures")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"quoteId\": \"69a02882f48d56c923119d95\",\n  \"addressFrom\": \"0xb7dE6b6eEBF7401aFea5a49D6405C9048fEf2d40\",\n  \"previousSignature\": {\n    \"signature\": \"<string>\",\n    \"key\": \"<string>\",\n    \"swapRequiredMetadata\": {}\n  },\n  \"signatureKey\": \"permit\",\n  \"signatureStep\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-partner.houdiniswap.com/v2/dex/chainSignatures")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"quoteId\": \"69a02882f48d56c923119d95\",\n  \"addressFrom\": \"0xb7dE6b6eEBF7401aFea5a49D6405C9048fEf2d40\",\n  \"previousSignature\": {\n    \"signature\": \"<string>\",\n    \"key\": \"<string>\",\n    \"swapRequiredMetadata\": {}\n  },\n  \"signatureKey\": \"permit\",\n  \"signatureStep\": 1\n}"

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

[
  {
    "key": "permit",
    "type": "chained",
    "step": 1,
    "totalSteps": 2,
    "isComplete": false,
    "data": {
      "primaryType": "Permit",
      "domain": {
        "name": "USD Coin",
        "version": "2",
        "chainId": 1,
        "verifyingContract": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48"
      },
      "types": {
        "Permit": [
          {
            "name": "owner",
            "type": "address"
          },
          {
            "name": "spender",
            "type": "address"
          },
          {
            "name": "value",
            "type": "uint256"
          },
          {
            "name": "nonce",
            "type": "uint256"
          },
          {
            "name": "deadline",
            "type": "uint256"
          }
        ]
      },
      "message": {
        "owner": "0xb7dE6b6eEBF7401aFea5a49D6405C9048fEf2d40",
        "spender": "0x1111111254eeb25477b68fb85ed929f73a960582",
        "value": "1000000000",
        "nonce": "3",
        "deadline": "1767225600"
      }
    }
  }
]

{
  "message": "<string>",
  "code": "<string>",
  "requestId": "<string>"
}

{}

{
  "message": "<string>",
  "code": "<string>",
  "requestId": "<string>"
}

{
  "message": "<string>",
  "code": "<string>",
  "fields": {},
  "requestId": "<string>"
}

{
  "message": "<string>",
  "code": "<string>",
  "requestId": "<string>"
}

{
  "message": "<string>",
  "code": "<string>",
  "requestId": "<string>"
}